Document:

<PAGE>

                                 EXHIBIT 10.117

                   LEASE AGREEMENT WITH THE APOLLO GROUP, INC.
                     FOR A PORTION OF WINDY POINT I BUILDING

<PAGE>

                            WINDY POINT OF SCHAUMBURG

                                  OFFICE LEASE

                                     BETWEEN

                        WINDY POINT OF SCHAUMBURG L.L.C.
                                   as Landlord

                                       AND

                             THE APOLLO GROUP, INC.
                                    as Tenant

Dated:  November 16, 2001

<PAGE>

                                TABLE OF CONTENTS
                                -----------------

<TABLE>
<CAPTION>
<S>                                                                   <C>
1     DEMISE AND TERM..............................................    2

2     RENT.........................................................    2
      A.    Definitions............................................    2
            -----------
      B.    Components of Rent.....................................    4
            ------------------
      C.    Payment of Rent........................................    5
            ---------------

3     USE. ........................................................    6

4     CONDITION OF PREMISES........................................    6
      A.    Initial Condition......................................    6
            ------------------
      B.    Americans With Disabilities Act........................    7
            -------------------------------
      C.    Environmental Protection...............................    7
            ------------------------

5     BUILDING SERVICES............................................    9
      A.    Basic Services.........................................    9
            --------------
      B.    Electricity............................................    9
            -----------
      C.    Telephones.............................................   10
            ----------
      D.    Additional Services....................................   11
            -------------------
      E.    Access.................................................   11
            ------
      F.    Failure or Delay in Furnishing Services................   12
            ---------------------------------------

6     RULES AND REGULATIONS........................................   12

7     CERTAIN RIGHTS RESERVED TO LANDLORD..........................   13

8     MAINTENANCE AND REPAIRS......................................   14

9     ALTERATIONS..................................................   14
      A.    Requirements...........................................   14
            ------------
      B.    Liens..................................................   15
            -----

10    INSURANCE....................................................   15
      A.    Tenant's Insurance.....................................   15
            ------------------
      B.    Landlord's Insurance...................................   16
            --------------------
      C.    Mutual Waiver of Subrogation...........................   16
            ----------------------------

11    WAIVER AND INDEMNITY.........................................   17
      A.    Waiver.................................................   17
            ------
      B.    Tenant's Indemnity.....................................   17
            ------------------
      C.    Landlord's Indemnity...................................   18
            --------------------
</TABLE>

                                        i

<PAGE>

<TABLE>
<S>                                                                    <C>
12    FIRE AND CASUALTY..............................................  18

13    CONDEMNATION...................................................  19

14    ASSIGNMENT AND SUBLETTING......................................  20
      A.    Landlord's Consent.......................................  20
            ------------------
      B.    Standards for Consent....................................  21
            ---------------------

15    SURRENDER......................................................  21

16    DEFAULTS AND REMEDIES..........................................  22
      A.    Default..................................................  22
            -------
      B.    Right of Re-Entry........................................  22
            -----------------
      C.    Reletting................................................  22
            ---------
      D.    Termination of Lease.....................................  23
            --------------------
      E.    Other Remedies...........................................  23
            --------------
      F.    Bankruptcy...............................................  23
            ----------
      G.    Waiver of Trial by Jury..................................  23
            -----------------------
      I.    Default by Landlord......................................  23
            -------------------

17    HOLDING OVER...................................................  24

18    INTENTIONALLY DELETED..........................................  24

19    [INTENTIONALLY DELETED]........................................  24

20    ESTOPPEL CERTIFICATES..........................................  24

21    SUBORDINATION..................................................  24

22    QUIET ENJOYMENT................................................  25

23    BROKER.........................................................  25

24    NOTICES........................................................  26

25    MISCELLANEOUS..................................................  27
      A.    Successors and Assigns...................................  27
            ----------------------
      B.    Entire Agreement.........................................  27
            ----------------
      C.    Time of Essence..........................................  27
            ---------------
      D.    Execution and Delivery...................................  27
            ----------------------
      E.    Severability.............................................  27
            ------------
</TABLE>

                                       ii

<PAGE>

<TABLE>
<S>                                                                    <C>
      F.    Governing Law............................................   27
            -------------
      G.    Attorneys' Fees..........................................   27
            ---------------
      H.    Joint and Several Liability..............................   27
            ---------------------------
      I.    Force Majeure............................................   27
            -------------
      J.    Captions.................................................   28
            --------
      K.    No Waiver................................................   28
            ---------
      L.    No Recording.............................................   28
            ------------
      M.    Limitation of Liability..................................   28
            -----------------------
      N.    Counterparts.............................................   28
            ------------

26.   PARKING........................................................   28

27.   EXTENSION OPTION...............................................   29
      A.    Extension Option.........................................   29
            ----------------
      B.    Terms....................................................   30
            -----
      C.    Amendment................................................   32
            ---------
      D.    Termination..............................................   32
            -----------

28.   EXCLUSIVITY....................................................   33
      A.    Exclusive Use............................................   33
            -------------
      B.    Exclusivity..............................................   33
            -----------
      C.    Enforcement..............................................   33
            -----------

29.   SIGNAGE........................................................   34

30.   TEMPORARY SPACE................................................   34

31.   AUTHORITY......................................................   35

EXHIBIT A - Plan of Premises.........................................  A-1
EXHIBIT B - Rules and Regulations....................................  B-1
EXHIBIT C - Work Letter Agreement....................................  C-1
      Schedule 1 - Base Building Standards
      Schedule 2 - The Space Plan
      Schedule 3 - The Apollo Tenant Standards
      Schedule 4 - Contractor's Insurance Requirements
EXHIBIT D - Suite Acceptance Agreement...............................  D-1
EXHIBIT E - Plan of Temporary Space..................................  E_1
EXHIBIT F - Form of SNDA.............................................  F_1
</TABLE>

                                       iii

<PAGE>

                                  OFFICE LEASE

         THIS LEASE is made as of November 16, 2001, between WINDY POINT OF
SCHAUMBURG L.L.C., a Delaware limited liability company, having an address at
c/o Fifield Realty Corp., 20 North Wacker Drive, Chicago, Illinois 60606
("Landlord"), and THE APOLLO GROUP, INC., an Arizona corporation, having an
address at c/o Apollo Development Corp., 4615 East Elwood Street, Suite 160,
Phoenix, Arizona 85040 ("Tenant"), for space in the building at 1500 McConnor
Parkway, in the office complex known as Windy Point of Schaumburg (such
building, including the land upon which the building and related facilities are
situated, being herein referred to as the "Building"). The following schedule
(the "Schedule") sets forth certain basic terms of this Lease:

                                    SCHEDULE
                                    --------

 1.      Premises:.................................    A)  Suite 700
                                                       B)  Approximately 28,322
                                                           rentable square feet
  Base Rent:
  ---------

                        Rate of Annual
                        --------------
                         Base Rent per     2. Rate of
                         -------------        -------
                           Rentable          Annual
                           --------          ------
      Month of Term       Square Foot       Base Rent      3.  Monthly Base
      -------------       -----------       ---------          ------------
                                                                    Rent
                                                                    ----

         1 - 3                - 0 -              - 0 -                 - 0 -

         4 - 12              $16.85        $477,225.72             $39,768.81

        13 - 24               17.27         489,156.36              40,763.03

        25 - 36               17.70         501,385.20              41,782.10

        37 - 48               18.15         513,919.92              42,826.66

        49 - 60               18.60         526,767.84              43,897.32

        61 - 72               19.06         539,937.12              44,994.76

        73 - 84               19.54         553,435.56              46,119.63

        85 - 87               20.03         567,271.44              47,272.62

 4.      Tenant's Proportionate Share:.......................          15.15%
 5.      Security Deposit:...................................            None
 6.      Scheduled Commencement Date:........................   April 1, 2002
 7.      Scheduled Expiration Date:..........................   June 30, 2009
 8.      Guarantor:..........................................            None
 9.      Broker(s):...............   Fifield Realty Corp., Todd Gould Company

<PAGE>
                                                  and Apollo Development Corp.
10.      Brokerage Agreement:.......        Prospect Registration Policy dated
                                            July 26, 2001, between Fifield
                                            Companies and Todd Gould Company

         1.   DEMISE AND TERM. Landlord leases to Tenant and Tenant leases from
Landlord the premises (the "Premises") described in Item 1 of the Schedule and
shown on the plan attached hereto as Exhibit A, subject to the covenants and
conditions set forth in this Lease, for a term (the "Term") commencing on the
date (the "Commencement Date") which is the earlier to occur of (a) the date
described in Item 6 of the Schedule, or (b) the date that Tenant takes occupancy
of the Premises for the conduct of business, and expiring on the date (the
"Expiration Date") that is the last day of the 87th full calendar month of the
Term, unless terminated earlier as otherwise provided in this Lease. The
Commencement Date is subject to deferment as provided in Paragraph 6 of the Work
Letter Agreement attached hereto as Exhibit C (the "Work Letter Agreement")
based upon the terms and conditions set forth therein. Tenant shall complete and
furnish to Landlord, on or before occupancy of the Premises, the Suite
Acceptance Agreement attached hereto as Exhibit D, which shall acknowledge the
actual Commencement Date and Expiration Date. In addition to the Premises,
Tenant shall have the right to use, in common with Landlord and all other
tenants and occupants of the Building, all portions of the Building designated
by Landlord for the common use of tenants and occupants, including, without
limitation, entrances and exits, hallways and elevators.

         2.   RENT.

         A.   Definitions.  For purposes of this Lease, the following terms
              -----------
shall have the following meanings:

                   (i)   "Expenses" shall mean all expenses, costs and

         disbursements (other than Taxes) paid or incurred by Landlord in
         connection with the ownership, management, maintenance, operation,
         replacement and repair of the Building. Expenses shall not include: (a)
         costs of tenant alterations and expenses for the preparation of
         leasable space or other work which Landlord performs in leasable space
         for any tenant and or prospective tenant of the Building; (b) costs of
         capital improvements (except for costs of any capital improvements (1)
         made or installed for the purpose of reducing Expenses or (2) made or
         installed pursuant to governmental requirement or insurance
         requirement, which costs shall be amortized by Landlord over the useful
         life of the improvement in accordance with sound accounting and
         management principles [and provided that with respect to costs of the
         type described in clause (1), the amortized amount included in Expenses
         in any year shall not exceed the savings in Expenses that occur in such
         year as a result of the capital improvement]); (c) interest and
         principal payments on mortgages and depreciation expenses (except
         interest on the cost of any capital improvements for which amortization
         may be included in the definition of Expenses) or any rental payments
         on any ground leases (except for rental payments which constitute
         reimbursement for Taxes and Expenses), and all other costs, including
         legal fees, transfer taxes, land trust fees, recording taxes and any
         other charges in connection with the transfer of ownership in the
         Building; (d) advertising expenses and

                                        2

<PAGE>

         leasing commissions; (e) any cost or expenditure for which Landlord is
         or will be reimbursed or indemnified, whether by insurance proceeds or
         otherwise (including insurance proceeds paid to Landlord due to a
         casualty), except through Adjustment Rent (hereinafter defined); (f)
         the cost of any kind of service furnished to any other tenant in the
         Building which Landlord does not generally make available to all
         tenants in the Building; (g) legal expenses of negotiating leases and
         amendments and incurred in connection with lease disputes; (h) overhead
         and administrative costs of Landlord not directly incurred in the
         operation and maintenance of the Building; (i) expenses incurred for
         replacement of any item to the extent that it is covered under
         warranty, and the cost of correcting defects in the initial
         construction of the Building or any common areas, provided, however,
         that repairs resulting from ordinary wear and tear shall not be deemed
         to be defects; (j) accounting and legal fees relating to the
         construction, leasing or sale of the Building; (k) any interest or
         penalty incurred due to the late payment of any operating expense
         and/or real estate tax (provided Tenant has paid all Adjustment Rent on
         a timely basis); (l) the cost of any penalty or fine incurred for
         noncompliance with any applicable law, code, ordinance, statute or
         governmental regulation; (m) any personal property taxes of Landlord
         for equipment or items not used in the operation or maintenance of the
         Building; (n) any management fees at a rate in excess of the rate then
         generally charged by property managers of comparable buildings in
         Schaumburg, Illinois; (o) payroll and payroll-related and other
         expenses related to any employees of Landlord above the level of
         Building Manager or equivalent operational level or not working
         full-time on the management or operation of the Building, provided that
         such expenses of part-time workers may be included if equitably
         allocated to reflect actual time spent on the Building; (p) any costs
         or expenses to acquire sculpture, paintings or other works of art; (q)
         the cost of overtime or other expense to Landlord in performing work
         expressly provided in this Lease to be borne at Landlord's expense; (r)
         all expenses directly resulting from the negligence or willful
         misconduct of the Landlord, its agents, servants or other employees;
         (s) all bad debt loss, rent loss or reserve for bad debt or rent loss;
         (t) payroll and payroll related expenses for any employees in
         commercial concessions operated by the Landlord; or (u) any amount paid
         to an entity related to Landlord which exceeds the amount that would
         have been paid for comparable goods or services in an arms-length
         transaction between unrelated parties in said market. Expenses shall be
         determined on a cash or accrual basis, as Landlord may elect (provided
         Landlord shall not change such method of determining Expenses during
         the Term).

                   (ii)  "Rent" shall mean Base Rent, Adjustment Rent and any
         other sums or charges due by Tenant hereunder.

                   (iii) "Rentable" shall mean the area of the applicable space
         determined in accordance with the Standard Method for Measuring Floor
         Area in Office Buildings, ANSI 765.1-1996, as promulgated by the
         Building Owners and Managers Association (BOMA) International.

                                        3

<PAGE>

                   (iv)  "Taxes" shall mean all taxes, assessments and fees
         levied upon the Building, the property of Landlord located therein or
         the rents collected therefrom, by any governmental entity based upon
         the ownership, leasing, renting or operation of the Building, including
         all costs and expenses of protesting any such taxes, assessments or
         fees. Taxes shall not include any net income, capital stock,
         succession, transfer, franchise, gift, estate or inheritance taxes;
         provided, however, if at any time during the Term, a tax or excise on
         income is levied or assessed by any governmental entity, in lieu of or
         as a substitute for, in whole or in part, real estate taxes or other ad
                                                                              --
         valorem taxes, such tax shall constitute and be included in Taxes. For
         -------
         the purposes of determining Taxes for any given year, the amount to be
         included for such year (a) from special assessments payable in
         installments shall be the amount of the installments (and any interest)
         due and payable during such year, and (b) from all other Taxes shall at
         Landlord's election either be the amount accrued, assessed or otherwise
         imposed for such year or the amount due and payable in such year
         (provided Landlord shall not change such method of determining Taxes
         during the Term and the method selected by Landlord shall be
         consistently applied in accordance with Generally Accepted Accounting
         Principles).

                   (v)   "Tenant's Proportionate Share" shall mean the
         percentage set forth in Item 4 of the Schedule which has been
         determined by dividing the rentable square feet in the Premises (i.e.,
         the number of rentable square feet stated in Item 1B of the Schedule)
         by the rentable square feet in the Building (i.e., 186,921).

         B.   Components of Rent.  Tenant agrees to pay the following amounts
              ------------------
to Landlord at the office of the Building or at such other place as Landlord
designates:

                   (i)   Base rent ("Base Rent") to be paid in monthly
         installments in the amount set forth in Item 3 of the Schedule in
         advance on or before the first day of each month of the Term, except
         that Tenant shall pay the fourth month's Base Rent upon execution of
         this Lease.

                   (ii)  Adjustment rent ("Adjustment Rent") in an amount equal
         to Tenant's Proportionate Share of (a) the Expenses for any calendar
         year and (b) the Taxes for any calendar year. Tenant shall not be
         obligated to pay Adjustment Rent for the first three months of the
         Term. Prior to each calendar year, Landlord shall estimate the amount
         of Adjustment Rent due for such year, and Tenant shall pay Landlord
         one-twelfth of such estimate on the first day of each month during such
         year. Such estimate may be revised by Landlord whenever it obtains
         information relevant to making such estimate more accurate. After the
         end of each calendar year, Landlord shall deliver to Tenant a report
         setting forth the actual Expenses and Taxes for such calendar year and
         a statement of the amount of Adjustment Rent that Tenant has paid and
         is payable for such year. Within thirty days after receipt of such
         report, Tenant shall pay to Landlord the amount of Adjustment Rent due
         for such calendar year minus any payments of Adjustment Rent made by
         Tenant for such year. If Tenant's estimated payments of Adjustment Rent
         exceed the amount due Landlord for such

                                        4

<PAGE>

         calendar year, Landlord shall apply such excess as a credit against
         Tenant's other obligations under this Lease or promptly refund such
         excess to Tenant if the Term has already expired, provided Tenant is
         not then in default hereunder, in either case without interest to
         Tenant.

              (iii)   Solely for purposes of calculating Tenant's Adjustment
         Rent, Controllable Expenses for any year of the Term shall not be
         deemed to exceed Controllable Expenses for the immediately preceding
         year of the Term by more than 5%. "Controllable Expenses" shall mean
         only those items of Expenses where the cost or expense thereof shall be
         within the reasonable ability of Landlord to control (specifically
         excluded from Controllable Expenses, without limitation, are the costs
         and expenses of electricity, fuels, insurance and snow-plowing and the
         wages of union employees [and the costs and expenses of independent
         contractors who may employ union employees]). Such limitation on
         Controllable Expenses shall apply only to Controllable Expenses and not
         to other items of Expenses or Taxes and shall not limit or otherwise
         affect Tenant's obligations regarding the payment of any component of
         Rent other than the Controllable Expenses component of Adjustable Rent.

         C.   Payment of Rent. The following provisions shall govern the payment
              ---------------
of Rent: (i) if this Lease commences or ends on a day other than the first day
or last day of a calendar year, respectively, the Rent for the year in which
this Lease so begins or ends shall be prorated and the monthly installments
shall be adjusted accordingly; (ii) except as otherwise expressly provided
herein, all Rent shall be paid to Landlord without offset or deduction, and the
covenant to pay Rent shall be independent of every other covenant in this Lease;
(iii) if during all or any portion of any year the Building is not at least 95%
rented and occupied, Landlord may elect to make an appropriate adjustment of
Expenses and/or Taxes for such year to determine the Expenses and/or Taxes that
would have been paid or incurred by Landlord had the Building been 95% rented
and occupied for the entire year and the amount so determined shall be deemed to
have been the Expenses and/or Taxes for such year; (iv) any sum due from Tenant
to Landlord which is not paid when due shall bear interest from the date due
until the date paid at the annual rate of 12% per annum, but in no event higher
than the maximum rate permitted by law (the "Default Rate"); and, in addition,
Tenant shall pay Landlord a late charge for any Rent payment which is paid more
than five days after its due date equal to 5% of such payment (provided Tenant
shall not be liable for such 5% late charge or such interest the first two times
Tenant fails to timely pay Rent when due in any calendar year unless, with
respect to each such incidence, such failure continues for more than five days
after written notice); (v) if changes are made to this Lease or the Building
changing the number of square feet contained in the Premises or in the Building,
Landlord shall make an appropriate adjustment to Tenant's Proportionate Share;
(vi) Tenant shall have the right, upon reasonable prior written notice to
Landlord, to inspect Landlord's accounting records relative to Expenses and
Taxes during normal business hours at any time within 120 days following the
furnishing to Tenant of the annual statement of Adjustment Rent; and, unless
Tenant shall take written exception to any item in any such statement within
such 120-day period, such statement shall be considered as final and accepted by
Tenant. Tenant must timely pay all Adjustment Rent billed by Landlord pending
the outcome of its inspection or any audit of Landlord's accounting records. If
Tenant makes such timely written exception, Landlord and Tenant shall act in
good faith to resolve any dispute. If Landlord and Tenant

                                       5

<PAGE>

are unable to resolve the dispute within 30 days, then by written notice to
Landlord given not later than 35 days after the date Tenant made the written
exception, Tenant may require that an audit as to the proper amount of
Adjustment Rent for such period shall be performed by an independent certified
public accounting firm selected by Tenant, but subject to Landlord's reasonable
approval, which audit shall be final and conclusive. If Tenant fails to timely
make a written exception or to timely require an audit by an independent
accounting firm, Landlord's statement shall be considered as final and accepted
by Tenant. If the results of such audit reveal that Tenant has overpaid or
underpaid Adjustment Rent for the applicable year, Landlord shall pay to Tenant
such overpayment or Tenant shall pay to Landlord such underpayment, as
applicable, within 30 days after the results of such audit are reported to the
parties. Tenant agrees to pay the entire cost of such audit unless it is
determined that Landlord's original determination of the Adjustment Rent for the
year in issue was in error by more than 3%, in which case Landlord agrees to pay
the cost of such audit. If Tenant makes a written exception to an item in
Landlord's statement and the audit reveals an error in such item for any prior
year in addition to the year in question, such error for the prior year shall
also be addressed in the manner set forth above; (vii) in the event of the
termination of this Lease prior to the determination of any Adjustment Rent,
Tenant's agreement to pay any such sums and Landlord's obligation to refund any
such sums (provided Tenant is not in default hereunder) shall survive the
termination of this Lease; (viii) no adjustment to the Rent by virtue of the
operation of the rent adjustment provisions in this Lease shall result in the
payment by Tenant in any year of less than the Base Rent shown on the Schedule;
(ix) Landlord may at any time change the fiscal year of the Building; (x) each
amount owed to Landlord under this Lease for which the date of payment is not
expressly fixed shall be due on the same date as the Rent listed on the
statement showing such amount is due; (xi) if Landlord fails to give Tenant an
estimate of Adjustment Rent prior to the beginning of any calendar year, Tenant
shall continue to pay Adjustment Rent at the rate for the previous calendar year
until Landlord delivers such estimate; and (xii) Tenant shall be entitled to
Tenant's Proportionate Share of any refund of Operating Expenses or Taxes
received by Landlord, but only to the extent Tenant paid a share of the
Operating Expenses or Taxes being refunded.

         3.   USE.   Tenant agrees that it shall occupy and use the Premises
only as business offices and as classrooms for adult education and for no other
purposes. Tenant shall comply with all federal, state and municipal laws,
ordinances and regulations and all covenants, conditions and restrictions of
record applicable to Tenant's use or occupancy of the Premises. Without limiting
the foregoing, Tenant shall not cause, nor permit, any hazardous or toxic
substances to be brought upon, produced, stored, used, discharged or disposed of
in, on or about the Premises without the prior written consent of Landlord and
then only in compliance with all applicable environmental laws.

         4.   CONDITION OF PREMISES.

         A.   Initial Condition. Tenant's taking possession of the Premises
              -----------------
shall be conclusive evidence that the Premises were in good order and
satisfactory condition when Tenant took possession, subject to "Punchlist Items"
described in the Work Letter Agreement. No agreement of Landlord to alter,
remodel, decorate, clean or improve the Premises or the Building (or to provide
Tenant with any credit or allowance for the same), and no representation
regarding the condition of

                                        6

<PAGE>

the Premises or the Building, have been made by or on behalf of Landlord or
relied upon by Tenant, except as stated in the Work Letter Agreement.

         B.  Americans With Disabilities Act. The parties acknowledge that the
             -------------------------------
Americans With Disabilities Act of 1990 (42 U.S.C. (S) 12101 et seq.) and
regulations and guidelines promulgated thereunder, as amended and supplemented
from time to time (collectively referred to herein as the "ADA"), establish
requirements under Title III of the ADA ("Title III") pertaining to business
operations, accessibility and barrier removal, and that such requirements may be
unclear and may or may not apply to the Premises and the Building. Tenant
further acknowledges and agrees that to the extent that Landlord prepares,
reviews or approves any of plans or specifications relating to leasehold
improvements in the Premises, such action shall in no event be deemed any
representation or warranty that the same comply with any requirements of the
ADA. Notwithstanding anything to the contrary in this Lease, the parties hereby
agree to allocate responsibility for Title III compliance as follows: (a)
Landlord shall be responsible, at its expense, for causing the base building
restrooms, elevator lobbies and common areas within the Building to comply with
the requirements of the ADA in effect as of the Commencement Date; (b) Landlord
shall perform, at Tenant's expense, any so-called Title III "path of travel"
requirements triggered by Tenant's performance of any construction activities or
alterations in the Premises after substantial completion of the Work; (c)
Landlord shall be responsible for causing the base building restrooms and
elevator lobbies within the Premises and the common areas of the Building to
comply with the requirements of the ADA as they may be changed or modified after
the Commencement Date, provided Landlord may include the expenses of such
compliance in Expenses (if and to the extent allowed pursuant to Section
2A(i)(b)); and (d) except as provided in clauses (a), (b) and (c), Tenant shall
be responsible for all Title III compliance and costs in connection with the
Premises, including structural work, if any, and including any leasehold
improvements or other work to be performed in the Premises under or in
connection with this Lease. Except as set forth above with respect to Landlord's
Title III obligations, Tenant shall be solely responsible for all other
requirements under the ADA relating to Tenant or any affiliates or persons or
entities related to Tenant, operations of Tenant or such affiliates or related
parties, or the Premises, including, without limitation, requirements under
Title I of the ADA pertaining to Tenant's employees.

         C.  Environmental Protection.
             ------------------------

             (i)    Tenant, on behalf of itself, its agents, its employees and
         its contractors, shall not cause or permit to occur (excluding acts of
         Landlord, other tenants of the Building and their respective agents,
         employees and contractors or anyone else not under the direct control
         of Tenant except as otherwise specifically provided above):

                    (1)  any violation of any federal, state or local law,
             ordinance or regulation related to environmental conditions in or
             about the Building, including, but not limited to, improvements or
             alterations made to the Premises at any time by Tenant, its agents
             or contractors, or

                                        7

<PAGE>

                     (2)  the use, generation, release, manufacture,
             refining, production, processing, storage or disposal of any
             Hazardous Substances (as hereinafter defined) in or about the
             Building, or the transportation to or from the Building of any
             Hazardous Substances (save and except reasonable quantities of
             normal office products such as cleaners, solvents and toners, all
             of which shall be stored and used by Tenant, at its expense, in
             compliance with all applicable laws).

    Tenant, on behalf of itself, its agents, its employees and its contractors,
    shall comply with each federal, state and local law, ordinance and
    regulation related to environmental conditions in or about the Premises or
    Tenant's use of the Premises, including, without limitation, all reporting
    requirements and the performance of any cleanups required by any
    governmental authorities. Tenant shall indemnify, defend and hold harmless
    Landlord and its employees from and against all fines, suits, claims,
    actions, damages, liabilities, costs and expenses (including reasonable
    attorneys' and consultants' fees) asserted against or sustained by any such
    person or entity and arising out of or in any way connected with a breach by
    Tenant of this Section 4C (including any action brought by any governmental
    authority or other regulatory body), which obligations shall survive the
    expiration or termination of this Lease.

             (ii)    Landlord, on behalf of itself, its agents, its employees
    and its contractors, shall not cause or permit to occur (excluding acts of
    Tenant, other tenants of the Building and their respective agents, employees
    and contractors or anyone else not under the direct control of Landlord
    except as otherwise specifically provided above):

                     (1)  any violation of any federal, state or local law,
             ordinance or regulation related to environmental conditions in or
             about the Building, including, but not limited to, improvements or
             alterations made to the Building at any time by Landlord, its
             agents or contractors, or

                     (2)  the use, generation, release, manufacture, refining,
             production, processing, storage or disposal of any Hazardous
             Substances in or about the Building, or the transportation to or
             from the Building of any Hazardous Substances (save and except
             reasonable quantities of normal cleaning and janitorial products,
             sanitary sewage and solid wastes, all of which shall be stored,
             disposed and used by Landlord, at its expense, in compliance with
             all applicable laws).

    Landlord, on behalf of itself, its agents, its employees and its
    contractors, shall comply with each federal, state and local law, ordinance
    and regulation related to environmental conditions in or about the Building,
    including, without limitation, all reporting requirements and the
    performance of any cleanups required by any governmental authorities. The
    costs and expenses of such compliance may be included in Expenses unless
    prohibited pursuant to Section 2A(i). Landlord shall indemnify, defend and
    hold harmless Tenant and its employees from and against all fines, suits,
    claims, actions, damages, liabilities, costs and expenses

                                        8

<PAGE>

         (including reasonable attorney's and consultant's fees) asserted
         against or sustained by any such person or entity and arising out of or
         in any way connected with a breach by Landlord of this Section 4C
         (including any action brought by any governmental authority or other
         regulatory body), which obligations shall survive the expiration or
         termination of this Lease.

             (iii)   As used in this Section 4C, "Hazardous Substances" shall
         include, without limitation, flammables, explosives, radioactive
         materials, asbestos containing materials (ACMs), polychlorinated
         biphenyls (PCBs), chemicals known to cause cancer or reproductive
         toxicity, pollutants, contaminants, hazardous wastes, toxic substances,
         petroleum and petroleum products, chlorofluorocarbons (CFCs), medical
         wastes and substances declared to be hazardous or toxic under any
         federal, state or local law, ordinance or regulation.

         5.  BUILDING SERVICES.

         A.  Basic Services. Landlord shall furnish the following services: (i)
             --------------
heating and air conditioning to provide a temperature condition required for
comfortable occupancy of the Premises under normal business operations (provided
Tenant, in designing the Work, has provided for the installation of sufficient
HVAC facilities to service the Premises for Tenant's use). The heating and air
conditioning for the Premises is provided through "heat pumps" which may be
controlled by Tenant (i.e., Tenant controls the hours of operation and the
temperature settings); (ii) water for drinking, and, subject to Landlord's
approval, water at Tenant's expense for any private restrooms and office kitchen
requested by Tenant; (iii) men's and women's restrooms at locations designated
by Landlord and in common with other tenants of the Building; (iv) daily janitor
service in the Premises and common areas of the Building, weekends and holidays
excepted, at a level consistent with that customarily provided to tenants of
comparable office buildings in the Schaumburg, Illinois, metropolitan area,
including periodic outside window washing of the perimeter windows in the
Premises; and (v) passenger elevator service in common with Landlord and other
tenants of the Building, 24 hours a day, 7 days a week; and freight elevator
service daily, weekends and holidays excepted, upon request of Tenant and
subject to scheduling and charges by Landlord. For purposes of this Section 5.A,
"holidays" shall mean New Years Day, Memorial Day, Independence Day, Labor Day,
Thanksgiving and Christmas, as well as, at Landlord's election, any other day
that the majority of comparable office buildings in Schaumburg, Illinois treat
as a public holiday.

         B.  Electricity. Electricity shall be distributed to the Premises by
             -----------
the electric utility company serving the Building (as designated by Landlord
from time to time) and Landlord shall permit Landlord's wire and conduits, to
the extent available, suitable and safely capable, to be used for such
distribution. Tenant at its cost shall make all necessary arrangements with the
electric utility company for metering and paying for electric current furnished
to the Premises. All electricity used during the performance of janitor service,
or the making of any alterations or repairs in the Premises, or the operation of
any special air conditioning systems serving the Premises, shall be paid for by
Tenant. The heat pumps providing heating and air conditioning services for the
Premises draw upon

                                        9

<PAGE>

the Building's electric supply (and the costs of such electricity consumed
during the Building's standard hours of operation shall be included in
Expenses).

         C.  Telephones. Tenant shall be responsible for arranging for its own
             ----------
telecommunications services at the Premises. All telegraph, telephone, and
electric connections which Tenant may desire shall be first approved by Landlord
in writing, before the same are installed (which approval shall not be
unreasonably withheld), and the location of all wires and the work in connection
therewith shall be performed by contractors approved by Landlord (which approval
shall not be unreasonably withheld), and shall be subject to the direction of
Landlord. Landlord reserves the right to designate and control the entity or
entities providing telephone or other communication cable installation, repair
and maintenance in the Building and to restrict and control access to telephone
cabinets, so long as in so doing, Tenant's ability to operate its business in
the Premises is not materially and adversely affected. If Landlord designates a
particular vendor or vendors to provide cable installation, repair and
maintenance for the Building, Tenant agrees to abide by and participate in such
program, so long as in so doing, Tenant's ability to operate its business in the
Premises is not materially and adversely affected. Tenant shall be responsible
for and shall pay all costs incurred in connection with the installation of
telephone cables and related wiring in the Premises, including, without
limitation, any hook-up, access and maintenance fees related to the installation
of such wires and cables in the Premises and the commencement of services
therein, and the maintenance thereafter of such wire and cables; and there shall
be included in Expenses for the Building all installation, hook-up or
maintenance costs incurred by Landlord in connection with telephone cables and
related wiring in the Building which are not allocable to any individual users
of such service but are allocable to the Building generally. If Tenant fails to
maintain all telephone cables and related wiring in the Premises and such
failure affects or interferes with the operation or maintenance of any other
telephone cables or related wiring in the Building, Landlord or any vendor hired
by Landlord may enter into and upon the Premises forthwith and perform such
repairs, restorations or alterations as Landlord reasonably deems necessary in
order to eliminate any such interference (and Landlord may recover from Tenant
all of Landlord's reasonable costs in connection therewith). When reviewing and
approving the locations of and specifications for telephone cables and related
wiring which are installed as part of the Work or subsequent alterations by
Tenant, Landlord shall specify, in writing, whether Tenant must remove such
telephone cables and related wiring at the expiration or termination of this
Lease. Upon expiration or termination of this Lease, Tenant shall remove all
telephone cables and related wiring installed by or for Tenant which Landlord so
requested Tenant to remove. Tenant agrees that neither Landlord nor any of its
agents or employees shall be liable to Tenant, or any of Tenant's employees,
agents, customers or invitees or anyone claiming through, by or under Tenant,
for any damages, injuries, losses, expenses, claims or causes of action because
of any interruption, diminution, delay or discontinuance at any time for any
reason in the furnishing of any telecommunications service to the Premises or
the Building. Notwithstanding the foregoing, the foregoing waiver shall not
relieve Landlord from liability for any damage, injury, loss, expense, claim or
cause of action which results from the negligence or wilful misconduct of
Landlord or its agents or employees, except to the extent that any such damage,
injury, loss, expense, claim or cause of action is insured against, or required
to be insured against, by Tenant pursuant to Section 10 of this Lease
(regardless of the amount of insurance proceeds collected or collectible under
any

                                       10

<PAGE>

insurance policies in effect) and except that Landlord shall in no event be
liable for indirect or consequential damages or lost profits.

         D   Additional Services. The standard hours of operation of the
             -------------------
Building's heating and air conditioning systems are Monday through Friday, 8:00
a.m. to 6:00 p.m., Saturdays, 8:00 a.m. to 1:00 p.m., holidays excepted. If
Tenant operates the heating and air conditioning systems serving the Premises
beyond the foregoing standard hours of operation, then (i) Tenant shall pay to
Landlord for such after-hours use of the heat pumps an amount equal to the
product of (x) the number of hours each such heat pump is used (as indicated by
the DDC program for the heat pump) multiplied by (y) the then-current hourly
charge established by Landlord for operating each heat pump for heating or
cooling, as the case may be (which charge shall include Landlord's electric
costs, and a reasonable fee to Landlord for maintenance and repair of the heat
pumps), and (ii) such operation will activate the Building's fan system, and
Tenant shall pay Landlord for such after-hours operation of the Building's fan
system at the then-current hourly charge established by Landlord (which charge
shall include Landlord's electric costs and a reasonable fee to Landlord for
maintenance and repair of the fan system). Furthermore, if due to an unusual
concentration of personnel or machinery in the Premises (compared to typical
office use), or an unusually large number of heat pumps serving the Premises
(compared to the number of heat pumps serving the other premises in the
Building), the heat pumps serving the Premises consume a disproportionate amount
of electricity, Tenant shall pay the costs and charges for such excess usage to
Landlord. Tenant shall pay all such costs relating to after-hours or excessive
use of the heating or air conditioning systems serving the Premises within 30
days after being billed therefor.

         Landlord shall not be obligated to furnish any services other than
those stated above in this Section 5. If Landlord elects to furnish services
requested by Tenant in addition to those stated above, Tenant shall pay
Landlord's then prevailing reasonable charges for such services. If Tenant shall
fail to make any such payment and such failure continues beyond all applicable
notice and cure periods, Landlord may, in addition to all other remedies
available to Landlord, discontinue any additional services. No discontinuance of
any such additional service shall result in any liability of Landlord to Tenant
or be considered as an eviction or a disturbance of Tenant's use of the
Premises. In addition, if Tenant's concentration of invitees, personnel or
equipment adversely affects the temperature or humidity in the Premises or the
Building, Landlord may install supplementary air conditioning units in the
Premises; and Tenant shall pay for the reasonable cost of installation and
maintenance thereof.

         E.  Access. Tenant's employees will have access to the Premises at all
             ------
times, subject to Landlord's reasonable security requirements and subject to
Sections 5F, 7, 8, 12, 13 and 25I. The Building will have a key card system (or
other comparable or superior system selected by Landlord) to limit after-hours
access. In addition, the Building may have manned security desk at hours
selected by Landlord. Landlord will provide Tenant with key cards for Tenant's
employees (at no charge with respect to the key cards initially provided to
Tenant and at a reasonable charge with respect to any replacements thereof).
Tenant's invitees will be required to present appropriate identification
(and/or, at Landlord's option, key cards supplied by Landlord, at Tenant's
expense), for after-hours access to

                                       11

<PAGE>

the Building. Tenant shall not allow any classes or other activities requiring
occupancy of the Building by Tenant's students or invitees to extend beyond
11:00 p.m. or to start before 8:00 a.m. If Landlord provides after-hours manned
security at the Building, Tenant shall pay its share of the cost of such
service, as reasonably allocated by Landlord among the tenants based upon
Landlord's reasonable determination of the after-hours use of the Building among
the tenants. For purposes of this Section 5E, "after-hours" shall mean before
8:00 a.m. or after 6:00 p.m. on weekdays and at any time on weekends or
holidays. Landlord shall schedule janitorial service to the Premises on weekdays
after 11:00 p.m. and prior to 8:00 a.m.

         F.  Failure or Delay in Furnishing Services. Tenant agrees that
             ---------------------------------------
Landlord shall not be liable for damages for failure or delay in furnishing any
service stated above if such failure or delay is caused, in whole or in part, by
any one or more of the events stated in Section 25I below, nor shall any such
failure or delay be considered to be an eviction or disturbance of Tenant's use
of the Premises, or relieve Tenant from its obligation to pay any Rent when due,
or from any other obligations of Tenant under this Lease. Notwithstanding the
foregoing, if as a result of a negligent act or omission of Landlord or any
employee of Landlord (as distinguished from an act or omission of Tenant or the
occurrence of an event of force majeure [as defined in Section 25I hereof] or
the occurrence of a fire or other casualty which is covered by Section 12
hereof), any service to the Premises as described above is not furnished to the
Premises and if as a result thereof the Premises, or a "material part" (as
defined below) of the Premises, is rendered untenantable or inaccessible for a
period of three consecutive business days, and Tenant does not occupy the
Premises, or such material part thereof which is rendered untenantable or
inaccessible, during such 3-business day period, then as Tenant's sole remedies
for such failure to furnish such service, (i) Base Rent and Adjustment Rent
payable for such portion of the Premises which Tenant does not so occupy shall
abate for the period commencing on the date of the onset of such untenantability
or inaccessibility and expiring on the date such service is restored or Tenant
is able to resume occupancy of the Premises or such material part thereof, as
the case may be and (ii) if such period of untenantability or inaccessibility
exceeds 90 consecutive days, Tenant may elect to terminate this Lease by
delivery of written notice to Landlord within 15 business days after the
expiration of such 90-day period. (As used herein, the phrase "material part"
shall mean an amount in excess of 25% of rentable area of the Premises or an
area within the Premises that is integral for Tenant's normal business
operations.) For purposes of this Lease, the Premises, or a part thereof, shall
be deemed to be "untenantable" if a condition exists such that the Premises, or
such part thereof, cannot be used for the purpose for which it was rented.

         6.  RULES AND REGULATIONS. Tenant shall observe and comply and shall
cause its subtenants, assignees, invitees, employees, contractors and agents to
observe and comply, with the rules and regulations listed on Exhibit B attached
hereto and with such reasonable modifications and additions thereto as Landlord
may make from time to time. Landlord shall not be liable for failure of any
person to obey such rules and regulations. Landlord shall not be obligated to
enforce such rules and regulations against any person, and the failure of
Landlord to enforce any such rules and

                                       12

<PAGE>

regulations. Landlord will provide Tenant with reasonable advance written notice
of any modifications or additions to the rules and regulations. No such
modifications may materially interfere with Tenant's normal business operations.
Furthermore, if any modification or addition to the rules and regulations
conflicts with any right expressly granted to Tenant in this Lease, the terms of
this Lease shall control and prevail.

     7.  CERTAIN RIGHTS RESERVED TO LANDLORD. Landlord reserves the following
rights, each of which Landlord may exercise without notice to Tenant and without
liability to Tenant, and the exercise of any such rights shall not be deemed to
constitute an eviction or disturbance of Tenant's use or possession of the
Premises and shall not give rise to any claim for set-off or abatement of rent
or any other claim: (a) to change the name or street address of the Building or
the suite number of the Premises; (b) to install, affix and maintain any and all
signs on the exterior or interior of the Building; (c) to make repairs,
decorations, alterations, additions, or improvements, whether structural or
otherwise, in and about the Building, and for such purposes to enter upon the
Premises, temporarily close doors, corridors and other areas in the Building and
interrupt or temporarily suspend services or use of common areas, and Tenant
agrees to pay Landlord for overtime and reasonably similar expenses incurred if
such work is done other than during ordinary business hours at Tenant's request;
(d) to retain at all times, and to use in appropriate instances, keys to all
doors within and into the Premises; (e) subject to Section 28, to grant to any
person or to reserve unto itself the exclusive right to conduct any business or
render any service in the Building; (f) to show or inspect the Premises at
reasonable times and upon reasonable prior notice to Tenant and, if vacated or
abandoned, to prepare the Premises for reoccupancy; (g) to install, use and
maintain in and through the Premises, pipes, conduits, wires and ducts serving
the Building, provided that such installation, use and maintenance does not
unreasonably interfere with Tenant's use of the Premises; and (h) to take any
other action which Landlord deems reasonable in connection with the operation,
maintenance or preservation of the Building. In the exercise of the foregoing
rights, Landlord will use reasonable efforts to minimize interference with
Tenant's business operations in the Premises. If, in exercising any of the
foregoing reserved rights and as a result of a negligent act or omission of
Landlord or any employee of Landlord (as distinguished from an act or omission
of Tenant or the occurrence of an event of force majeure [as defined in Section
25I hereof] or the occurrence of a fire or other casualty which is covered by
Section 12 hereof) in connection therewith, the Premises, or a "material part"
(as defined below) of the Premises, is rendered untenantable or inaccessible for
a period of three consecutive business days, and Tenant does not occupy the
Premises, or such material part thereof which is rendered untenantable or
inaccessible, during such 3-business day period, then as Tenant's sole remedies
for untenantability or inaccessibility, (i) Base Rent and Adjustment Rent
payable for such portion of the Premises which Tenant does not so occupy shall
abate for the period commencing on the date of the onset of such untenantability
or inaccessibility and expiring on the date Tenant is able to resume occupancy
of the Premises or such material part thereof, as the case may be and (ii) if
such period of untenantability or inaccessibility exceeds 90 consecutive days,
Tenant may elect to terminate this Lease by delivery of written notice to
Landlord within 15 business days after the expiration of such 90-day notice. (As
used herein, the phrase "material part" shall mean an amount in excess of 25% of
rentable area of the Premises or an area within the Premises that is integral
for Tenant's normal business operations.)

                                       13

<PAGE>

     8. MAINTENANCE AND REPAIRS. Landlord shall maintain in good order and
repair the structural elements, roof, exterior walls and windows and public
common areas of the Building, and the base Building plumbing, heating,
ventilating and air conditioning systems. Subject to Tenant's obligations
pursuant to this Lease, Landlord shall also perform any maintenance or make any
repairs to the Building as Landlord may reasonably deem necessary for the
safety, operation or preservation of the Building, or as Landlord may be
required or requested to do by any governmental authority or by the order or
decree of any court or by any other proper authority. The costs and expenses of
Landlord's maintenance and repairs shall be included in Expenses, except to the
extent prohibited pursuant to Section 2A(i)(b). Tenant, at its expense, shall
maintain and keep the Premises in good order and repair at all times during the
Term, subject to Sections 12 and 13 and Landlord's obligations pursuant to this
Lease. In addition, Tenant shall reimburse Landlord for the cost of any repairs
to the Building necessitated by the acts or omissions of Tenant, its subtenants,
assignees, invitees, employees, contractors and agents, to the extent Landlord
is not reimbursed for such costs under its insurance policies. Subject to the
preceding sentence, Landlord shall perform any maintenance or make any repairs
to the Building as Landlord shall desire or deem necessary for the safety,
operation or preservation of the Building, or as Landlord may be required or
requested to do by any governmental authority or by the order or decree of any
court or by any other proper authority.

     9. ALTERATIONS.

     A. Requirements. Tenant shall not make any replacement, alteration,
        ------------
improvement or addition to or removal from the Premises (collectively an
"alteration") without the prior written consent of Landlord. In the event Tenant
proposes to make any alteration, Tenant shall, prior to commencing such
alteration, submit to Landlord for prior written approval: (i) detailed plans
and specifications; (ii) sworn statements, including the names, addresses and
copies of contracts for all contractors; (iii) all necessary permits evidencing
compliance with all applicable governmental rules, regulations and requirements;
(iv) certificates of insurance in form and amounts required by Landlord, naming
Landlord and any other parties designated by Landlord as additional insureds;
and (v) all other documents and information as Landlord may reasonably request
in connection with such alteration. Tenant agrees to pay all out-of-pocket costs
and expenses incurred by Landlord for review of all such items and supervision
of the alteration. Neither approval of the plans and specifications nor
supervision of the alteration by Landlord shall constitute a representation or
warranty by Landlord as to the accuracy, adequacy, sufficiency or propriety of
such plans and specifications or the quality of workmanship or the compliance of
such alteration with applicable law. Tenant shall pay the entire cost of the
alteration and, if the cost of the alteration, together with all related
alterations, will exceed $100,000 and if requested by Landlord, shall deposit
with Landlord prior to the commencement of the alteration, security for the
payment and completion of the alteration in form and amount reasonably required
by Landlord (not to exceed 50% of the estimated cost of the alteration).
Notwithstanding the foregoing, no consent shall be necessary for any decorative
or cosmetic alteration (or related alteration) that (i) costs less than $100,000
(provided such alteration is not part of related alterations which cost, in the
aggregate, more than $100,000 ), (ii) does not require the issuance of a
building permit, (iii) does not adversely affect the structural elements of the
Building or the base Building mechanical, electrical or plumbing systems, the
common areas of the

                                       14

<PAGE>

Building or the use by other tenants in the Building of their demised premises,
(iv) does not affect the architectural aesthetics of the Building or the
appearance of any part of the Building outside the Premises and (v) does not
involve the introduction or disturbance of any Hazardous Materials (provided
that even if Landlord's consent is not necessary for such an alteration, the
following provisions of this Section 9A shall apply). Each alteration shall be
performed in a good and workmanlike manner, in accordance with the plans and
specifications approved by Landlord, and shall meet or exceed the standards for
construction and quality of materials established by Landlord for the Building.
In addition, each alteration shall be performed in compliance with all
applicable governmental and insurance company laws, regulations and
requirements. Each alteration shall be performed by union contractors if
required by Landlord and in harmony with Landlord's employees, contractors and
other tenants. Each alteration, whether temporary or permanent in character,
made by Landlord or Tenant in or upon the Premises (excepting only Tenant's
furniture, equipment and trade fixtures) shall become Landlord's property and
shall remain upon the Premises at the expiration or termination of this Lease
without compensation to Tenant; provided, however, that Landlord shall have the
right to require Tenant to remove such alteration at Tenant's sole cost and
expense in accordance with the provisions of Section 15 of this Lease.
Notwithstanding anything contained in this Section 9A to the contrary, if
Landlord gives its consent or approval, pursuant to the provisions of this
Section 9A, to allow Tenant to make any alterations in the Premises, Landlord
agrees to notify Tenant in writing at the time of the giving of such consent or
approval whether Landlord will require Tenant to remove such alterations at the
termination or expiration of this Lease.

     B.  Liens. Upon completion of any alteration, Tenant shall promptly furnish
         -----
Landlord with sworn owner's and contractors statements and full and final
waivers of lien covering all labor and materials included in such alteration.
Tenant shall not permit any mechanic's lien to be filed against the Building, or
any part thereof, arising out of any alteration performed, or alleged to have
been performed, by or on behalf of Tenant. If any such lien is filed, Tenant
shall within 25 days thereafter have such lien released of record or deliver to
Landlord a bond in form, amount, and issued by a surety satisfactory to
Landlord, indemnifying Landlord against all costs and liabilities resulting from
such lien and the foreclosure or attempted foreclosure thereof. If Tenant fails
to have such lien so released or to deliver such bond to Landlord, Landlord,
without investigating the validity of such lien, may pay or discharge the same;
and Tenant shall reimburse Landlord upon demand for the amount so paid by
Landlord, including Landlord's reasonable expenses and reasonable attorneys'
fees.

     10. INSURANCE.

     A.  Tenant's Insurance. Tenant, at its expense, shall maintain at all times
         ------------------
extended coverage, vandalism, malicious mischief, sprinkler leakage, water
damage and all risk coverage and demolition and debris removal, insuring the
full replacement cost of all improvements, alterations or additions to the
Premises made at Tenant's expense, and all other property owned or used by
Tenant and located in the Premises; (b) commercial general liability insurance,
including blanket contractual liability insurance, with respect to the Building
and the Premises, with limits to be set by Landlord from time

                                       15

<PAGE>

to time but in any event not less than $3,000,000 each occurrence combined
single limit for bodily injury, sickness or death or for damage to or
destruction of property, including loss of use thereof; (c) workers'
compensation and occupational disease insurance with Illinois statutory benefits
and employers liability insurance with limits of not less than $3,000,000 each
accident, each disease and aggregate for disease; and (d) insurance against such
other risks and in such other amounts as Landlord may from time to time
reasonably require. The form of all such policies and deductibles thereunder
shall be subject to Landlord's prior approval, which approval shall not be
unreasonably withheld, conditioned or delayed. All such policies shall be issued
by insurers reasonably acceptable to Landlord and licensed to do business in
Illinois. The insurance policies shall name Landlord, any mortgage lender their
respective affiliates, subsidiaries, successors and assigns, the property
manager and any other parties designated by Landlord as additional insureds. All
policies shall require at least thirty (30) days' prior written notice to
Landlord of termination or modification and shall be primary and not
contributory. Tenant shall at least ten (10) days prior to the Commencement
Date, and within ten (10) days prior to the expiration of each such policy,
deliver to Landlord certificates evidencing the foregoing insurance or renewal
thereof, as the case may be.

     B.  Landlord's Insurance. Landlord shall at all times during the Term carry
         --------------------
a policy of insurance which insures the Building, including the Premises,
against loss or damage by fire or other casualty (namely, the perils against
which insurance is afforded by a fire insurance policy with "special cause of
loss coverage") in an amount not less than the replacement cost of the Building
(excluding foundations); provided, however, that Landlord shall not be
responsible for, and shall not be obligated to insure against, any loss of or
damage to any personal property of Tenant, or which Tenant may have in the
Building or the Premises or any trade fixtures installed by or paid for by
Tenant on the Premises or any additional improvements which Tenant may construct
on the Premises, and Landlord shall not be liable for any loss or damage to such
property, regardless of cause, including the negligence of Landlord and its
employees, agents, contractors, customers and invitees. If any alterations or
improvements made by Tenant pursuant to Section 9 hereof result in an increase
of the premiums charged during the Term on the casualty insurance carried by
Landlord on the Building, then the cost of such increase in insurance premiums
shall be borne by Tenant, which shall reimburse Landlord for the same as
additional rent after being billed therefor. Landlord shall also carry
commercial general liability insurance with respect to the Building in amounts
and with coverages deemed prudent by Landlord (or may self-insure against the
liabilities covered by such insurance). Such policy shall be excess and
non-contributory of Tenant's liability policies. The cost of all insurance
maintained by Landlord shall be included in Expenses.

     C.  Mutual Waiver of Subrogation. Landlord and Tenant each agree that
         ----------------------------
neither Landlord nor Tenant (nor their respective successors or assigns) will
have any claim against the other for any loss, damage or injury to property
which is covered by insurance carried by either party (or which would have been
covered if it had carried the insurance required by this Lease), notwithstanding
the negligence of either party in causing the loss. The waiver also applies to
each party's directors, officers, employees, shareholders and agents. The waiver
does not apply to claims caused by a party's wilful misconduct.

                                       16

<PAGE>

     If despite a party's best efforts it cannot find an insurance company that
will allow a waiver at reasonable commercial rates, then it shall give notice to
the other party within 30 days after discovering such situation. The other party
shall then have 30 days to find an insurance company that will allow the waiver.
If the other party cannot find such an insurance company, then both parties
shall be released from their obligation to obtain the waiver.

     If an insurance company is found but it will allow the waiver only at rates
greater than reasonable commercial rates, then the parties can agree to pay for
the waiver under any agreement they can negotiate. If the parties cannot in good
faith negotiate an agreement, then both parties shall be released from their
obligation to obtain the waiver.

     11. WAIVER AND INDEMNITY.

     A.  Waiver. Tenant releases Landlord, its property manager and their
         ------
respective agents and employees from, and waives all claims for, damage or
injury to person or property and loss of business sustained by Tenant and
resulting from the Building or the Premises or any part thereof or any equipment
therein becoming in disrepair, or resulting from any accident in or about the
Building. This paragraph shall apply particularly, but not exclusively, to
flooding, damage caused by Building equipment and apparatus, water, snow, frost,
steam, excessive heat or cold, broken glass, sewage, gas, odors, excessive noise
or vibration or the bursting or leaking of pipes, plumbing fixtures or sprinkler
devices. Without limiting the generality of the foregoing, Tenant waives all
claims and rights of recovery against Landlord, its property manager and their
respective agents and employees for any loss or damage to any property of
Tenant, which loss or damage is insured against, or required to be insured
against, by Tenant pursuant to Section 10 above, whether or not such loss or
damage is due to the fault or negligence of Landlord, its property manager or
their respective agents or employees, and regardless of the amount of insurance
proceeds collected or collectible under any insurance policies in effect.
Notwithstanding anything contained in this Section 11A to the contrary, Tenant
shall not be deemed to release Landlord, its property manager or their
respective agents or employees from, or waive claims for, damage or injury to
person or property or loss of business sustained by Tenant to the extent
resulting from the negligence or wilful misconduct of Landlord, its property
manager or their respective agents or employees, except to the extent that such
damage, injury or loss sustained by Tenant is insured against, or required to be
insured against, by Tenant pursuant to Section 10 of this Lease (regardless of
the amount of insurance proceeds collected or collectible under any insurance
policies in effect).

     B.  Tenant's Indemnity. Tenant agrees to indemnify, defend and hold
         ------------------
harmless Landlord, its property manager and their respective agents and
employees, from and against any and all claims, demands, actions, liabilities,
damages, costs and expenses (including attorneys' fees), for injuries to any
persons and damage to or theft or misappropriation or loss of property occurring
in or about the Building and arising from the use and occupancy of the Premises
or from any activity, work, or thing done, permitted or suffered by Tenant in or
about the Premises (including, without limitation, any alteration by Tenant) or
from any breach or default on the part of Tenant in the performance of any
covenant or agreement on the part of Tenant to be performed under this Lease or
due to any other

                                       17

<PAGE>

act or omission of Tenant, its subtenants, assignees, invitees, employees,
contractors and agents. If any such proceeding is filed against Landlord or any
such indemnified party, Tenant agrees to defend Landlord or such party in such
proceeding at Tenant's sole cost by legal counsel reasonably satisfactory to
Landlord, if requested by Landlord. Notwithstanding anything contained in this
Section 11B to the contrary, Tenant shall not be required to indemnify Landlord,
its property manager or their respective agents and employees to the extent of
any claim or matter which results from the negligence or wilful misconduct of
the indemnified party, except to the extent that such claim or matter is insured
against, or required to be insured against, by Tenant pursuant to Section 10 of
this Lease (regardless of the amount of insurance proceeds collected or
collectible under any insurance policies in effect).

     C.  Landlord's Indemnity. Subject to the provisions of Section 25M below,
         --------------------
Landlord agrees to indemnify, defend and hold harmless Tenant and its agents and
employees, from and against any and all claims, demands, actions, liabilities,
damages, costs and expenses (including attorneys' fees), for injuries to any
persons and damage to or theft or misappropriation or loss of tangible property
occurring in or about the Building and arising from any breach or default on the
part of Landlord in the performance of any covenant or agreement on the part of
Landlord to be performed under this Lease or due to any other negligent act or
omission or wilful misconduct of Landlord, its employees, contractors and
agents. If any such proceeding is filed against Tenant or any such indemnified
party, Landlord agrees to defend Tenant or such party in such proceeding at
Landlord's sole cost by legal counsel reasonably satisfactory to Tenant, if
requested by Tenant. Notwithstanding anything contained in this Section 11C to
the contrary, Landlord shall not be required to indemnify Tenant or its agents
and employees from or in respect of any claim or matter which results from the
negligence or wilful misconduct of Tenant or its agents and employees.

     12. FIRE AND CASUALTY. Upon a fire or other casualty affecting the Premises
or the Building, Landlord, with reasonable diligence, shall restore the Premises
or the Building, as applicable. Notwithstanding the foregoing, if 25% or more of
the rentable area of the Premises or all or a substantial part of the Building
is rendered untenantable by reason of fire or other casualty, Landlord may, at
its option, either restore the Premises and the Building, or terminate this
Lease effective as of the date of such fire or other casualty. Landlord agrees
to give Tenant written notice within 60 days after the occurrence of any such
fire or other casualty designating whether Landlord elects to so restore or
terminate this Lease. If Landlord elects to terminate this Lease, Rent shall be
paid through and apportioned as of the date of such fire or other casualty. If
Landlord elects to restore, Landlord's obligation to restore the Premises shall
be limited to restoring those improvements in the Premises existing as of the
date of such fire or other casualty which were made at Landlord's expense and
shall exclude any furniture, equipment, fixtures, additions, alterations or
improvements in or to the Premises which were made at Tenant's expense. If
Landlord elects to restore, Rent shall abate for that part of the Premises which
is untenantable (as defined in Section 5F) on a per diem basis from the date of
such fire or other casualty until Landlord has substantially completed its
repair and restoration work, provided that Tenant does not occupy such part of
the Premises during said period.

                                       18

<PAGE>

     Notwithstanding anything contained in this Section 12 to the contrary,
within 60 days after the date of any fire or other casualty which renders all or
a substantial part of the Premises or the Building untenantable, Landlord shall
provide to Tenant in writing Landlord's good faith estimate of the time required
by Landlord to restore the Premises ("Landlord's Restoration Estimate"). If
Landlord's Restoration Estimate exceeds 270 days from the date of such fire or
casualty, then Tenant shall have the right, exercisable by written notice to
Landlord within 15 business days after delivery of Landlord's Restoration
Estimate, to terminate this Lease as of the date of such fire or other casualty.
Furthermore, if neither party elects to terminate this Lease as provided above
and Landlord fails to substantially complete the restoration of the Premises
within the time period set forth in Landlord's Restoration Estimate (subject to
delays caused by or attributable to Tenant or its agents, employees or
contractors or to events of the type described in Section 25I), as Tenant's sole
and exclusive remedy for such delay in substantial completion of the
restoration, Tenant shall have the right, exercisable by written notice to
Landlord within 15 business days after the expiration of the time period set
forth in Landlord's Restoration Estimate, to terminate this Lease as of the date
of such fire or other casualty. Notwithstanding the foregoing, Tenant shall have
no right to terminate this Lease if the fire or other casualty was caused, in
whole or in part, by the negligence or intentional misconduct of Tenant or
Tenant's agents, employees, contractors, invitees, subtenants or assigns.

     13.  CONDEMNATION. If the Premises or the Building is rendered unusable by
Tenant for the normal conduct of its business in the Premises, by reason of a
condemnation (or by a deed given in lieu thereof), then either party may
terminate this Lease by giving written notice of termination to the other party
within 30 days after such condemnation, in which event this Lease shall
terminate effective as of the date which is the day immediately preceding the
date of such condemnation. If this Lease so terminates, Rent shall be paid
through and apportioned as of such termination date. If such condemnation does
not render the Premises or the Building unusable, this Lease shall continue in
effect and Landlord shall promptly restore the portion not condemned to the
extent reasonably possible to the condition existing prior to the condemnation.
In such event, however, Landlord shall not be required to expend an amount in
excess of the proceeds received by Landlord from the condemning authority.
Landlord reserves all rights to compensation for any condemnation. Tenant hereby
assigns to Landlord any right Tenant may have to such compensation, and Tenant
shall make no claim against Landlord or the condemning authority for
compensation for termination of Tenant's leasehold interest under this Lease or
interference with Tenant's business. Tenant's assignment of its interest in any
condemnation award to Landlord is conditioned upon its legal right to prosecute
a separate claim in the condemnation proceeding for any relocation award to
which it may be entitled or for any furniture, trade fixtures or other fixtures
which Tenant is entitled to remove at the termination of the Lease and which are
subject to the taking, for the unamortized cost of any improvements paid for by
Tenant and for any relocation or other business disruption loss Tenant incurs as
a result of such taking. If Tenant's access to the Premises is permanently taken
as a result of the condemnation, the Lease shall terminate upon the effective
date of the taking unless the parties agree otherwise.

                                       19

<PAGE>

     14. ASSIGNMENT AND SUBLETTING.

     A.  Landlord's Consent. Tenant shall not, without the prior written consent
         ------------------
of Landlord: (i) assign, convey, mortgage or otherwise transfer this Lease or
any interest hereunder, or sublease the Premises, or any part thereof, whether
voluntarily or by operation of law; or (ii) permit the use of the Premises by
any person other than Tenant and its employees. As provided in Section 14B,
Landlord shall not unreasonably withhold, condition or delay its consent to any
assignment or sublease. Any such transfer, sublease or use described in the
preceding sentence (a "Transfer") occurring without the prior written consent of
Landlord shall be void and of no effect. Landlord's consent to any Transfer
shall not constitute a waiver of Landlord's right to withhold its consent to any
future Transfer. Landlord's consent to any Transfer or acceptance of rent from
any party other than Tenant shall not release Tenant from any covenant or
obligation under this Lease. Landlord may require as a condition to its consent
to any assignment of this Lease that the assignee execute an instrument in which
such assignee assumes the obligations of Tenant hereunder. For the purposes of
this paragraph, the transfer (whether direct or indirect) of all or a majority
of the capital stock in a corporate Tenant (other than the shares of the capital
stock of a corporate Tenant whose stock is publicly traded) or the merger,
consolidation or reorganization of such Tenant and the transfer of all or any
general partnership interest in any partnership Tenant shall be considered a
Transfer. If Tenant is a general or limited partnership (or is comprised of two
or more persons or entities), the change or conversion of Tenant to (i) a
limited liability company, (ii) a limited liability partnership or (iii) any
other entity which possesses the characteristics of limited liability shall be
prohibited unless the prior written consent of Landlord is obtained, which
consent may be withheld in Landlord's sole discretion. Any such change or
conversion without Landlord's consent shall not release the individuals or
entities comprising Tenant from personal liability hereunder. Notwithstanding
anything contained in this Section 14A to the contrary, provided Tenant is not
then in Default under this Lease, Tenant shall have the right to assign this
Lease or sublease the Premises, or any part thereof, to an "Affiliate" (as
defined below) without the prior written consent of Landlord, subject to all of
the other provisions of this Lease, specifically including, without limitation,
the continuation of liability of Tenant under this Lease (and provided Tenant
notifies Landlord of such assignment or sublease within 30 days after it
occurs). Upon an assignment of this Lease to an Affiliate, the Affiliate shall
assume the obligations of the lessee under this Lease from and after the
effective date of such assignment pursuant to a written assumption agreement
executed and delivered to Landlord within 30 days after the effective date of
such assignment. "Affiliate" shall mean (i) any corporation or other entity
controlling, controlled by or under the common control with Tenant, (ii) the
surviving entity formed as a result of a merger or consolidation with Tenant or
(iii) any person or entity that acquires substantially all of Tenant's assets as
a going concern. The word "control", as used herein, shall mean the power to
direct or cause the direction of the management and policies of the controlled
entity through ownership of more than 50% of the voting securities in such
controlled entity. Nothing contained in this Section 14A shall permit an
assignment of this Lease or the subleasing of the Premises to any Affiliate that
is disreputable, non-creditworthy or otherwise not in keeping with the nature or
class of tenants in a Class A office building, as reasonably determined by
Landlord. In addition, Tenant shall have the right to provide space in the
Premises from time to time (i) to business entities or other organizations for
the purpose of conducting educational

                                       20

<PAGE>

programs and/or meetings from classrooms within the Premises (provided (w)
Tenant shall not allow the use of more than three classrooms, in the aggregate,
by such third parties at any time, (x) all such programs and/or meetings shall
be a business use consistent with the uses and expectations of tenants in a
Class A office building, (y) any school or other educational facility using such
space shall not use such space for more than 90 consecutive days at one time,
and (z) Tenant shall provide Landlord with at least two business days prior
written notice before each such use), and (ii) to concessionaires or independent
contractors who provide services directly related to Tenant's use (such as a
bookstore or a food and beverage service [provided any such food and beverage
service operates only between the hours of 6:00 p.m. and 11:00 p.m. on
weekdays]) or serving Tenant's staff and students (but not to exceed 10% of the
rentable area of the Premises, in the aggregate with all such concessionaires
and contractors), and such use of the Premises shall not constitute a Transfer
requiring Landlord's consent. Tenant shall remain liable for all acts or
omissions of such users, concessionaires and contractors as if they were
employees of Tenant.

     B.  Standards for Consent. If Tenant desires the consent of Landlord to a
         ---------------------
Transfer, Tenant shall submit to Landlord, at least 30 days prior to the
proposed effective date of the Transfer, a written notice which includes such
information as Landlord may require about the proposed Transfer and the
transferee. Landlord shall not unreasonably withhold or condition its consent to
any assignment or sublease. Landlord shall notify Tenant whether Landlord
withholds or conditions its consent within 15 days after Tenant has submitted to
Landlord the written notice and accompanying information described above.
Landlord shall not be deemed to have unreasonably withheld its consent if, in
the reasonable judgment of Landlord: (i) the transferee is of a character or
engaged in a business which is not in keeping with the standards or criteria
used by Landlord in leasing the Building; (ii) the financial condition of the
transferee is such that it may not be able to perform its obligations in
connection with this Lease; (iii) the purpose for which the transferee intends
to use the Premises or portion thereof is in violation of the terms of this
Lease or the lease of any other tenant in the Building; or (iv) any other
reasonable bases. If Landlord consents to any Transfer, Tenant shall pay to
Landlord 50% of all rent and other consideration received by Tenant in excess of
the Rent paid by Tenant hereunder for the portion of the Premises so transferred
(after deducting therefrom the amount of all reasonable brokerage commissions,
cash allowances and tenant improvement costs actually paid by Tenant in
connection with such Transfer, which amount shall be amortized on a
straight-line basis over the lease term of the applicable Transfer). Such rent
shall be paid as and when received by Tenant. In addition, Tenant shall pay to
Landlord any attorneys' fees and expenses incurred by Landlord in connection
with any proposed Transfer, whether or not Landlord consents to such Transfer.

     15. SURRENDER. Upon termination of the Term or Tenant's right to possession
of the Premises, Tenant shall return the Premises to Landlord in good order and
condition, ordinary wear and damage by fire or other casualty excepted. If
Landlord requires Tenant to remove any alterations pursuant to Section 9, then
such removal shall be done in a good and workmanlike manner; and upon such
removal Tenant shall restore the Premises to its condition prior to the
installation of such alterations. If Tenant does not remove such alterations
after request to do so by Landlord, Landlord may remove the same and restore the
Premises; and Tenant shall pay the cost of such removal and

                                       21

<PAGE>

restoration to Landlord upon demand. Tenant shall also remove its furniture,
equipment, trade fixtures and all other items of personal property from the
Premises prior to the termination of the Term or Tenant's right to possession of
the Premises. If Tenant does not remove such items, Tenant shall be conclusively
presumed to have conveyed the same to Landlord without further payment or credit
by Landlord to Tenant; or at Landlord's sole option such items shall be deemed
abandoned, in which event Landlord may cause such items to be removed and
disposed of at Tenant's expense, without notice to Tenant and without obligation
to compensate Tenant.

     16. DEFAULTS AND REMEDIES.

     A.  Default. The occurrence of any of the following shall constitute a
         -------
default (a "Default") by Tenant under this Lease: (i) Tenant fails to pay any
Rent when due and such default shall continue for five days after written notice
to Tenant; (ii) Tenant fails to perform any other provision of this Lease and
such failure is not cured within 30 days (or immediately if the failure involves
a hazardous condition) after notice from Landlord (or if such failure not
involving a hazardous condition will take longer than 30 days to cure, if Tenant
fails to immediately commence curing such failure or thereafter fails to
diligently pursue such cure to completion and in all events if Tenant fails to
complete such cure within 90 days after such failure); (iii) the leasehold
interest of Tenant is levied upon or attached under process of law; (iv) Tenant
or any guarantor of this Lease dissolves; (v) Tenant abandons or vacates the
Premises and ceases paying Rent; or (vi) any voluntary or involuntary
proceedings are filed by or against Tenant or any guarantor of this Lease under
any bankruptcy, insolvency or similar laws and, in the case of any involuntary
proceedings, are not dismissed within 60 days after filing.

     B.  Right of Re-Entry. Upon the occurrence of a Default, Landlord may elect
         -----------------
to terminate this Lease, or, without terminating this Lease, terminate Tenant's
right to possession of the Premises. Upon any such termination, Tenant shall
immediately surrender and vacate the Premises and deliver possession thereof to
Landlord. Tenant grants to Landlord the right to enter and, using such force as
may be allowed by law, repossess the Premises, expel Tenant and any others who
may be occupying the Premises and remove any and all property therefrom, without
being deemed in any manner guilty of trespass and without relinquishing
Landlord's rights to Rent or any other right given to Landlord hereunder or by
operation of law.

     C.  Reletting. If Landlord terminates Tenant's right to possession of the
         ---------
Premises without terminating this Lease, Landlord may relet the Premises or any
part thereof. In such case, Landlord shall use reasonable efforts to relet the
Premises on such terms as Landlord shall reasonably deem appropriate; provided,
however, Landlord may first lease Landlord's other available space and shall not
be required to accept any tenant offered by Tenant or to observe any
instructions given by Tenant about such reletting. Tenant shall reimburse
Landlord for the reasonable costs and expenses of reletting the Premises
including, but not limited to, all brokerage, advertising, legal, alteration and
other expenses incurred to secure a new tenant for the Premises. In addition, if
the consideration collected by Landlord upon any such reletting, after payment
of the expenses of reletting the Premises which have not been reimbursed by
Tenant, is insufficient to pay monthly the full amount

                                       22

<PAGE>

of the Rent, Tenant shall pay to Landlord the amount of each monthly deficiency
as it becomes due. If such consideration is greater than the amount necessary to
pay the full amount of the Rent, the full amount of such excess shall be
retained by Landlord and shall in no event be payable to Tenant.

     D.  Termination of Lease. If Landlord terminates this Lease, Landlord may
         --------------------
recover from Tenant and Tenant shall pay to Landlord, on demand, as and for
liquidated and final damages, an accelerated lump sum amount equal to the amount
by which Landlord's reasonable estimate of the aggregate amount of Rent owing
from the date of such termination through the Expiration Date plus Landlord's
reasonable estimate of the aggregate reasonable expenses of reletting the
Premises, exceeds Landlord's estimate of the fair rental value of the Premises
for the same period (after deducting from such fair rental value the time needed
to relet the Premises and the amount of concessions which would normally be
given to a new tenant), both discounted to present value at the rate of 7% per
annum.

     E.  Other Remedies. Landlord may but shall not be obligated to perform any
         --------------
obligation of Tenant under this Lease; and, if Landlord so elects, all costs and
expenses paid by Landlord in performing such obligation, together with interest
at the Default Rate, shall be reimbursed by Tenant to Landlord on demand. Any
and all remedies set forth in this Lease: (i) shall be in addition to any and
all other remedies Landlord may have at law or in equity, (ii) shall be
cumulative, and (iii) may be pursued successively or concurrently as Landlord
may elect. The exercise of any remedy by Landlord shall not be deemed an
election of remedies or preclude Landlord from exercising any other remedies in
the future.

     F.  Bankruptcy. If Tenant becomes bankrupt, the bankruptcy trustee shall
         ----------
not have the right to assume or assign this Lease unless the trustee complies
with all requirements of the United States Bankruptcy Code; and Landlord
expressly reserves all of its rights, claims, and remedies thereunder.

     G.  Waiver of Trial by Jury. Landlord and Tenant waive trial by jury in the
         -----------------------
event of any action, proceeding or counterclaim brought by either Landlord or
Tenant against the other in connection with this Lease.

     H.  Venue. If either Landlord or Tenant desires to bring an action against
         -----
the other in connection with this Lease, such action shall be brought in the
federal or state courts located in Chicago, Illinois. Landlord and Tenant
consent to the jurisdiction of such courts and waive any right to have such
action transferred from such courts on the grounds of improper venue or
inconvenient forum.

     I.  Default by Landlord. Landlord's failure to perform or observe any of
         -------------------
its material obligations under this Lease shall constitute a default by Landlord
under this Lease only if such failure shall continue for a period of 30 days (or
the additional time, if any, that is reasonably necessary to cure the failure)
after Landlord receives written notice from Tenant specifying the default. The
notice shall give in reasonable detail the nature and extent of the failure and
shall

                                       23

<PAGE>

identify the Lease provision(s) containing the obligation(s). If Landlord shall
default in the performance of any of its obligations under this Lease (after
notice and opportunity to cure as provided herein), Tenant may pursue any
remedies available to it under the law and this Lease.

     17. HOLDING OVER. If Tenant retains possession of the Premises after the
expiration or termination of the Term or Tenant's right to possession of the
Premises, Tenant shall pay Rent during such holding over at 150% of the rate in
effect immediately preceding such holding over computed on a monthly basis for
each month or partial month that Tenant remains in possession. Tenant shall also
pay, indemnify and defend Landlord from and against all claims and damages,
consequential as well as direct, sustained by reason of Tenant's holding over
(provided Tenant shall not be liable for consequential damages unless such
holding over extends more than 30 days after the last to occur of (x) the
expiration or termination of this Lease and (y) written notice from Landlord
that holding over by Tenant may result in consequential damages). The provisions
of this Section do not waive Landlord's right of re-entry or right to regain
possession by actions at law or in equity or any other rights hereunder, and any
receipt of payment by Landlord shall not be deemed a consent by Landlord to
Tenant's remaining in possession or be construed as creating or renewing any
lease or right of tenancy between Landlord and Tenant.

     18. INTENTIONALLY DELETED.

     19. [INTENTIONALLY DELETED]

     20. ESTOPPEL CERTIFICATES. Tenant agrees that, from time to time upon not
less than 10 business days' prior written request by Landlord, Tenant shall
execute and deliver to Landlord a written certificate certifying: (i) that this
Lease is unmodified and in full force and effect (or if there have been
modifications, a description of such modifications and that this Lease as
modified is in full force and effect); (ii) the dates to which Rent has been
paid; (iii) that Tenant is in possession of the Premises, if that is the case;
(iv) that Landlord is not in default under this Lease, or, if Tenant believes
Landlord is in default, the nature thereof in detail; (v) that Tenant has no
off-sets or defenses to the performance of its obligations under this Lease (or
if Tenant believes there are any off-sets or defenses, a full and complete
explanation thereof); and (vi) such additional matters as may be requested by
Landlord, it being agreed that such certificate may be relied upon by any
prospective purchaser, mortgagee or other person having or acquiring an interest
in the Building. If Tenant fails to execute and deliver any such certificate
within 10 business days after request, and such failure continues for more than
five days after a second written request from Landlord, then such failure shall
constitute a Default hereunder (without the necessity of delivering any further
notice as otherwise required pursuant to Section 16A).

     21. SUBORDINATION. This Lease is and shall be expressly subject and
subordinate at all times to (a) any present or future ground, underlying or
operating lease of the Building, and all amendments, renewals and modifications
to any such lease, and (b) the lien of any present or future mortgage or deed of
trust encumbering fee title to the Building and/or the leasehold estate under
any such lease. If any such mortgage or deed of trust be foreclosed, or if any
such lease be terminated,

                                       24

<PAGE>

upon request of the mortgagee, beneficiary or lessor, as the case may be, Tenant
will attorn to the purchaser at the foreclosure sale or to the lessor under such
lease, as the case may be. The foregoing provisions are declared to be
self-operative and no further instruments shall be required to effect such
subordination and/or attornment; provided, however, that Tenant agrees upon
request by any such mortgagee, beneficiary, lessor or purchaser at foreclosure,
as the case may be, to execute such subordination and/or attornment instruments
as may be required by such person to confirm such subordination and/or
attornment on the form customarily used by such party. Notwithstanding the
foregoing to the contrary, any such mortgagee, beneficiary or lessor may elect
to give the rights and interests of Tenant under this Lease (excluding rights in
and to insurance proceeds and condemnation awards) priority over the lien of its
mortgage or deed of trust or the estate of its lease, as the case may be. In the
event of such election and upon the mortgagee, beneficiary or lessor notifying
Tenant of such election, the rights and interests of Tenant shall be deemed
superior to and to have priority over the lien of said mortgage or deed of trust
or the estate of such lease, as the case may be, whether this Lease is dated
prior to or subsequent to the date of such mortgage, deed of trust or lease. In
such event, Tenant shall execute and deliver whatever instruments may be
required by such mortgagee, beneficiary or lessor to confirm such superiority on
the form customarily used by such party. If Tenant fails to execute any
instrument required to be executed by Tenant under this Section 21 within 10
business days after written request, and such failure continues for more than
five days after a second written request from Landlord, then such failure shall
constitute a Default hereunder (without the necessity of delivering any further
notice as otherwise required pursuant to Section 16A). Notwithstanding anything
in this Section 21 to the contrary, Landlord agrees to procure and deliver to
Tenant prior to the Commencement Date a non-disturbance agreement from the
present first mortgagee on the form attached hereto as Exhibit F. Landlord
represents to Tenant that, as of the date of this Lease, National City Bank of
Michigan-Illinois is the only mortgagee upon the Building. Furthermore, Tenant's
agreement under this Section to subordinate this Lease to the interest of any
holder of a ground, underlying or operating lease or mortgage or deed of trust
executed or delivered after the execution and delivery of this Lease is subject
to and conditioned on Landlord causing such party to deliver to Tenant a
non-disturbance and attornment agreement on such party's customary form whereby
such party agrees that so long as Tenant is not in default under the terms of
this Lease, Tenant's tenancy for the use and purposes herein described and all
rights granted to Tenant herein will not be disturbed and will remain in full
force and effect throughout the Term of this Lease and any extensions thereof.

     22. QUIET ENJOYMENT. As long as no Default exists, Tenant shall peacefully
and quietly have and enjoy the Premises for the Term, free from interference by
Landlord, subject, however, to the provisions of this Lease. The loss or
reduction of Tenant's light, air or view will not be deemed a disturbance of
Tenant's occupancy of the Premises nor will it affect Tenant's obligations under
this Lease or create any liability of Landlord to Tenant.

     23. BROKER. Tenant represents to Landlord that Tenant has dealt only
with the brokers set forth in Item 9 of the Schedule (the "Brokers") in
connection with this Lease and that, insofar as Tenant knows, no other broker
negotiated this Lease or is entitled to any commission in connection herewith.
Tenant agrees to indemnify, defend and hold Landlord, its property manager and
their

                                       25

<PAGE>

respective employees harmless from and against all claims, demands, actions,
liabilities, damages, costs and expenses (including, attorneys' fees) arising
from either (i) a claim for a fee or commission made by any broker, other than
the Brokers, claiming to have acted by or on behalf of Tenant in connection with
this Lease, or (ii) a claim of, or right to, lien under the statutes of Illinois
relating to real estate broker liens with respect to any such broker retained by
Tenant. Landlord represents to Tenant that Landlord has dealt only with the
Brokers in connection with this Lease and that, insofar as Landlord knows, no
other broker negotiated this Lease or is entitled to any commission in
connection herewith. Landlord agrees to indemnify, defend and hold Tenant
harmless from and against all claims, demands, actions, liabilities, damages,
costs and expenses (including, attorneys' fees) arising from a claim for a fee
or commission made by any broker, other than the Brokers, claiming to have acted
by or on behalf of Landlord in connection with this Lease. Landlord agrees to
pay the Brokers a commission in accordance with the separate agreement between
Landlord and the Brokers described in Item 10 of the Schedule.

     24. NOTICES. All notices and demands to be given by one party to the other
party under this Lease shall be given in writing, mailed or delivered to
Landlord or Tenant, as the case may be, at the address set forth below or at
such other address as either party may hereafter designate. Notices shall be
delivered by hand by a documented service or by United States certified or
registered mail, postage prepaid, return receipt requested, or by a nationally
recognized overnight air courier service.

         If to Tenant:                       The University of Phoenix, Inc.
                                             c/o Apollo Development Corp.
                                             4615 East Elwood Street, Suite 160
                                             Phoenix, Arizona 85040
                                             Attention: Mr. William J. Swirtz,
                                             President

         With copies (in cases of            Snell & Wilmer L.L.P.
         notices of default only) to:        One Arizona Center
                                             Phoenix, Arizona 85004-2202
                                             Attention: Jody Pokorski, Esq.

         If to Landlord:                     Windy Point of Schaumburg L.L.C.
                                             c/o Fifield Realty Corp.
                                             20 North Wacker Drive
                                             Suite 3200
                                             Chicago, Illinois 60606
                                             Attention: President

         With copies to:                     Citigroup Investments
                                             190 South LaSalle Street
                                             Suite 2740
                                             Chicago, Illinois 60603
                                             Attn: Vice President

                                       26

<PAGE>

Notices shall be considered to have been given upon actual receipt (or refusal
to accept delivery).

         25.  MISCELLANEOUS.

         A.   Successors and Assigns. Subject to Section 14 of this Lease, each
              ----------------------
provision of this Lease shall extend to, bind and inure to the benefit of
Landlord and Tenant and their respective legal representatives, successors and
assigns; and all references herein to Landlord and Tenant shall be deemed to
include all such parties.

         B.   Entire Agreement. This Lease, and the riders and exhibits, if any,
              ----------------
attached hereto which are hereby made a part of this Lease, represent the
complete agreement between Landlord and Tenant; and Landlord has made no
representations or warranties except as expressly set forth in this Lease. No
modification or amendment of or waiver under this Lease shall be binding upon
Landlord or Tenant unless in writing signed by Landlord and Tenant.

         C.   Time of Essence. Time is of the essence of this Lease and each and
              ---------------
all of its provisions.

         D.   Execution and Delivery. Submission of this instrument for
              ----------------------
examination or signature by Tenant does not constitute a reservation of space or
an option for lease, and it is not effective until execution and delivery by
both Landlord and Tenant. Execution and delivery of this Lease by Tenant to
Landlord shall constitute an irrevocable offer by Tenant to lease the Premises
on the terms and conditions set forth herein, which offer may not be revoked for
seven days after such delivery.

         E.   Severability. The invalidity or unenforceability of any provision
              ------------
of this Lease shall not affect or impair any other provisions.

         F.   Governing Law. This Lease shall be governed by and construed in
              -------------
accordance with the laws of the State in which the Premises are located.

         G.   Attorneys' Fees. The nonprevailing party shall pay the prevailing
              ---------------
party all costs and expenses, including reasonable attorneys' fees, incurred by
such prevailing party in successfully enforcing the nonprevailing party's
obligations or successfully defending the prevailing party's rights under this
Lease against the nonprevailing party. Each party hereto shall pay the costs and
expenses, including reasonable attorneys' fees, incurred by the other party as a
result of any litigation in which such first party causes such second party,
without such second party's fault to become involved as a result of this Lease.

         H.   Joint and Several Liability. If Tenant is comprised of more than
              ---------------------------
one party, each such party shall be jointly and severally liable for Tenant's
obligations under this Lease.

         I.   Force Majeure. Landlord shall not be in default hereunder and
              -------------
Tenant shall not be excused from performing any of its obligations hereunder if
Landlord is prevented from performing

                                       27

<PAGE>

any of its obligations hereunder due to any accident, breakage, strike, shortage
of materials, acts of God or other causes beyond Landlord's reasonable control.
Tenant shall not be in default hereunder and Landlord shall not be excused from
performing any of its obligations hereunder if Tenant is prevented from
performing any of its obligations hereunder due to any accident, breakage,
strike, shortage of materials, acts of God or other causes beyond Tenant's
reasonable control (provided, however, no cause of any sort shall excuse Tenant
from its obligations to pay Rent when due and to surrender the Premises upon the
expiration of the Term as provided herein).

     J.  Captions. The headings and titles in this Lease are for convenience
         --------
only and shall have no effect upon the construction or interpretation of this
Lease.

     K.  No Waiver. No receipt of money by either party from the other after
         ---------
termination of this Lease or after the service of any notice or after the
commencing of any suit or after final judgment for possession of the Premises
shall renew, reinstate, continue or extend the Term or affect any such notice or
suit. No waiver of any default of either party shall be implied from any
omission by the other to take any action on account of such default if such
default persists or be repeated, and no express waiver shall affect any default
other than the default specified in the express waiver and then only for the
time and to the extent therein stated.

     L.  No Recording. Tenant shall not record this Lease or a memorandum of
         ------------
this Lease in any official records.

     M.  Limitation of Liability. Any liability of Landlord under this Lease
         -----------------------
shall be limited solely to its equity interest in the Building, and in no event
shall any personal liability be asserted against Landlord in connection with
this Lease nor shall any recourse be had to any other property or assets of
Landlord.

     N.  Counterparts. This Lease may be executed in multiple counterparts
         ------------
which, when taken together, shall be deemed to constitute a single instrument.

     26. PARKING. The Windy Point of Schaumburg complex currently consists of
two office towers (designated as "Phase I" [which is the Building] and "Phase
II"), a Morton's restaurant, an undeveloped restaurant site and two hotels
(collectively, the "Complex"). Serving the Complex there are a total of
approximately 2,150 parking spaces as of the date of this Lease (including
estimated spaces on the undeveloped restaurant site). Within the Complex there
are, as of said date, approximately 830 parking spaces serving Phase I and
approximately 970 parking spaces serving Phase II (or a total of approximately
1,800 spaces for Phases I and II combined). Of the Phases I and II parking
spaces, as of said date, a total of 683 spaces are reserved either to existing
tenants or are designated as Handicapped or 45-Minute Spots. As of the date of
this Lease, Phase II is a fully-occupied, single tenant building to the East of
the Building. Tenant may use for parking the surface parking areas serving the
Complex, free of charge on a first come, first-served basis. Such use of the
parking spaces shall be subject to rules and regulations promulgated from time
to time by Landlord. Tenant acknowledges and agrees that Landlord or other
owners may designate certain spaces or areas

                                       28

<PAGE>

in the Complex as "reserved," and Tenant agrees not to permit its employees,
agents, guests and invitees to park in such spaces or areas (subject to the
following limitation on Landlord's right to designate additional reserved
parking spaces). Furthermore, Tenant agrees that during the hours 8:00 a.m. to
5:30 p.m. on weekdays, Tenant and its employees, agents, contractors and
invitees shall not use more than 4.0 parking spaces per 1,000 rentable square
feet of the Premises (i.e., initially, 113 parking spaces). Tenant's business
operates primarily after normal business hours and requires parking capacity
beyond normal office usage. Landlord acknowledges that, for Tenant to optimize
its business operations at the Premises, Tenant would like to have available up
to 380 parking spaces in the parking lots serving Phase I and Phase II of the
Complex between the hours of 5:30 p.m. and 11:30 p.m. on weekdays and during
normal business hours on weekends ("Tenant's Hours"). Tenant acknowledges that
there are a total of approximately 1,117 unreserved parking spaces serving Phase
I and Phase II as of the date of this Lease. Tenant further acknowledges that
the use of such spaces will be on a first-come, first-served basis. Tenant
further acknowledges that the current tenants and occupants of the Complex are
not limited in the number of parking spaces that they may use during Tenant's
Hours.

     Landlord agrees that, to the extent within Landlord's control, Landlord
will not (a) knowingly permit any of the parking lots serving the Complex to be
used for off-site parking or by any parties other than owners, occupants and
tenants of the Complex and their invitees, (b) after the date of this Lease,
reserve so many additional parking spaces that thereafter less than 380 parking
spaces in the lots serving the Complex are available for Tenant's use on a
first-come, first-served basis during Tenant's Hours, and/or (c) restripe or
reconfigure the parking lots so that, as a result of such reconfiguration or
restriping, less than 380 parking spaces in the lots serving the Complex are
available for Tenant's use on a first-come, first-served basis during Tenant's
Hours. Landlord agrees that in entering into a lease with a new tenant for Phase
I or Phase II, Landlord will not enter into such lease if Landlord reasonably
believes, at the time of execution of such new lease, that as the result of the
proposed business operations of such new tenant there will not be 380 parking
spaces in the lots serving the Complex available for Tenant's use, on a
first-come, first served basis, during Tenant's Hours. Furthermore, in deciding
whether to consent to any proposed subletting or assignment of any lease in
Phase I or Phase II, to the extent allowed by law and the applicable lease,
Landlord will withhold its consent to such subletting or assignment if Landlord
reasonably believes at the time of execution of such sublease or assignment
that, as the result of the proposed business operations of such subtenant or
assignee, there will not be 380 parking spaces in the lots serving the Complex
available for Tenant's use, on a first-come, first served basis, during Tenant's
Hours. Both parties covenant and agree that they will cooperate fully and
reasonably with one another to develop viable plans and alternatives to satisfy
Tenant's parking needs of up to 380 parking spaces during Tenant's Hours if
unreserved parking serving the Complex proves to be inadequate on a first-come,
first-served basis.

     27. EXTENSION OPTION.

     A.  Extension Option. Tenant shall have an option (the "Extension Option")
         ----------------
to extend the Term with respect to all (but not less than all) of the Premises
demised under or pursuant to this

                                       29

<PAGE>

Lease as of the expiration date of the initial Term, for one additional term
(the "Extension Term") of five years, upon the following terms and conditions:

          (1)    Tenant gives Landlord written notice of Tenant's election to
     exercise the Extension Option not later than nine months prior to the
     expiration date of the initial Term;

          (2)    Tenant submits current financial statements of Tenant to
     Landlord concurrently with Tenant's notice exercising the Extension Option
     (provided Tenant shall not be required to submit such financial statements
     concurrently with exercise of the Extension Option if Tenant's financial
     statements are readily available through public sources) and such financial
     statements are reasonably satisfactory to Landlord; and

          (3)    Tenant is not in Default under this Lease, either on the date
     Tenant exercises the Extension Option or on the expiration date of the
     initial Term, and this Lease is in full force and effect on the date on
     which Tenant exercises the Extension Option and on the proposed
     commencement date of the Extension Term.

     B.   Terms. If Tenant timely and properly exercises the Extension Option:
          -----

          (1)    The Rent payable for the Extension Term shall be equal to the
     "market rate of rent" that Landlord reasonably anticipates will be in
     effect at the commencement of the Extension Term. "Market rate of rent"
     shall mean 95% of the rate of Base Rent (including component parts of such
     rate of Base Rent such as fixed and/or indexed rental adjustments and
     taking into account tenant concessions, if any, such as rent abatements and
     tenant improvement allowances), plus 100% of the rental adjustments for
     Taxes and Expenses for the Building, which landlords of comparable
     buildings in Schaumburg, Illinois are offering to third party tenants for
     office space comparable to the Premises (taking into account the lengths of
     the terms and the sizes and levels of improvement of the spaces demised
     under such leases to third party tenants). The Base Rent payable during the
     Extension Term shall be subject to adjustment during the Extension Term as
     provided in Landlord's written notice setting forth the market rate of
     rent. There shall be no abatement of Base Rent or Adjustment Rent for the
     Premises during the Extension Term, except as may be specifically provided
     in Landlord's written notice setting forth the market rate of rent.

          (2)    Upon Tenant's exercise of the Extension Option, Landlord shall
     provide to Tenant written notice of Landlord's determination of the "market
     rate of rent" within 30 days. Tenant shall have 20 days ("Tenant's Review
     Period") after receipt of Landlord's notice of the proposed "market rate of
     rent" within which to accept such proposed "market rate of rent" or to
     object thereto in writing. If Tenant so objects, Landlord and Tenant shall
     attempt to agree upon such "market rate of rent" in good faith. If Landlord
     and Tenant fail to reach agreement by the date that is 20 days following
     the expiration of Tenant's Review Period (the "Outside Agreement Date"),
     then each party's good faith determination of "market rate of

                                       30

<PAGE>

     rent" shall be submitted by sealed bid to arbitration in accordance with
     the following procedure:

               (a) Not later than 20 days following the Outside Agreement Date,
          Landlord and Tenant shall each appoint one independent arbitrator who
          shall by profession be a real estate appraiser (with the professional
          designation of M.A.I. or, if M.A.I. ceases to exist, a comparable
          designation from an equivalent professional appraiser organization)
          who shall have been active over the 10-year period ending on the date
          of such appointment in appraising commercial office properties in
          Rosemont, Illinois. The determination of the arbitrators shall be
          limited solely to the issue of whether Landlord's or Tenant's
          submitted "market rate of rent" for the Extension Term is the closest
          to the "market rate of rent" for the Extension Term as determined by
          the arbitrators, taking into account the elements listed in Section
          27B(1).

               (b) The two arbitrators so appointed shall within 10 days of the
          date of the appointment of the last appointed arbitrator agree upon
          and appoint a third arbitrator who shall be qualified under the same
          criteria set forth hereinabove for qualification of the initial two
          arbitrators. If the two arbitrators fail to agree upon and appoint a
          third arbitrator, both arbitrators shall be dismissed and Landlord and
          Tenant each shall promptly select and appoint one new arbitrator each
          possessing the qualifications above.

               (c) The three arbitrators shall within 30 days of the appointment
          of to the third arbitrator reach a decision as to whether the parties
          shall use Landlord's or Tenant's submitted "market rate of rent" and
          shall notify Landlord and Tenant thereof in writing.

               (d) The decision of the majority of the three arbitrators shall
          be binding upon Landlord and Tenant and judgment upon such decision
          may be entered into by any court having jurisdiction over Landlord and
          Tenant.

               (e) The cost of arbitration shall be paid by Landlord if Tenant's
          submitted "market rate of rent" is selected and by Tenant if
          Landlord's submitted "market rate of rent" is selected.

               (f) Notwithstanding the foregoing, if either Landlord or Tenant
          fails to appoint an arbitrator within 30 days after the Outside
          Agreement Date as provided above and such failure to appoint an
          arbitrator is not cured within 10 days after receipt by such failing
          party of written demand to do so by the other party (which other party
          shall have appointed its arbitrator prior to sending such written
          demand), then the arbitrator appointed by the party sending such
          demand, acting alone, shall reach a decision on the applicable "market
          rate of rent," notify Landlord and Tenant

                                       31

<PAGE>

          in writing thereof, and such arbitrator's decision shall be binding on
          Landlord and Tenant.

               (g) If for any reason whatsoever the applicable "market rate of
          rent" has been determine by the commencement date of the Extension
          Term, the average of (a) the "market rate of rent" (and terms of
          payment)as proposed by Landlord and (b) the be rent" (and terms of
          payment) as proposed by Tenant, shall be utilized as the rate of rent
          until such time as the final "market rate of rent" has been
          conclusively determined (at which time, (x) if Landlord's submitted
          "market rate of rent" is selected, Tenant shall promptly pay Landlord
          the excess amount due, if any, for the period during which the
          "average" market rate of base rent was utilized or (y) if Tenant's
          submitted "market rate of rent" is selected, Landlord shall credit
          against rent next coming due the excess amount paid by Tenant, if any,
          for the period during which the "average" market rate of rent was
          utilized.)

          (3)  Tenant shall have no further options to extend the Term of this
     Lease be yond the expiration date of the Extension Term.

          (4)  Landlord shall not be obligated to perform any leasehold
     improvement work in the Premises or give Tenant any allowance for any such
     work or any other purposes during or for the Extension Term, except as to
     any allowance which may be specifically provided in Landlord's written
     notice setting forth the market rate of rent.

          (5)  Except for the rate of Base Rent and except as otherwise provided
     herein, all of the terms and provisions of this Lease shall remain the same
     and in full force and effect during the Extension Term.

     C.   Amendment. If Tenant exercises the Extension Option, Landlord and
          ---------
Tenant shall execute and deliver an amendment to this Lease reflecting the lease
of the Premises by Landlord to Tenant for the Extension Term on the terms
provided above, which amendment shall be executed and delivered within 30 days
after the final determination of the market rate of rent for the Extension Term.

     D.   Termination. The Extension Option shall automatically terminate and
          -----------
become null and void upon the earlier to occur of (1) the expiration or
termination of this Lease, (2) the termination of Tenant's right to possession
of all or any part of the Premises, (3) the assignment of this Lease by Tenant,
in whole or in part (other than to an Affiliate), (4) the sublease by Tenant of
all or any part of the Premises (other than to an Affiliate), or (5) the failure
of Tenant to timely or properly exercise the Extension Option.

                                       32

<PAGE>

     28.  EXCLUSIVITY.

     A.   Exclusive Use. As used in this Section, the "Exclusive Use" shall mean
          -------------
the operation of an adult educational facility (not including an educational
facility for a tenant's or occupant's own employees or contractors).

     B.   Exclusivity. So long as Tenant is not in Default under this Lease and
          -----------
the primary use being made of the Premises is the Exclusive Use, and subject to
applicable anti-trust and fair trade laws, statutes, rules and regulations,
Landlord agrees that Landlord will not itself hereafter lease at any time during
the Term any space in the Building to a tenant for the express permitted primary
use and purpose of the Exclusive Use; provided, however, that Landlord shall not
be obligated to expressly state in any lease that the tenant thereunder may not
use its premises for the Exclusive Use. It shall not be a breach of the
aforesaid covenant and Landlord shall have no liability to Tenant hereunder if:

          (1) any tenant of the Building uses its premises for the Exclusive Use
     in violation of the express permitted use set forth in such tenant's lease;

          (2) any tenant of the Building uses its premises for the Exclusive
     Use, but such use is incidental to and not the primary use permitted under
     such tenant's lease;

          (3) any tenant of the Building under a lease in existence as of the
     date of this Lease (including, without limitation, Global Knowledge
     Network, Inc.) uses its premises for the Exclusive Use; or

          (4) any tenant of the Building subleases its premises or transfers or
     assigns its lease (whether by voluntary transfer, bankruptcy or operation
     of law) to a tenant which uses its premises for the Exclusive Use;
     provided, however, that Landlord shall, if and to the extent permitted by
     law and the provisions of the applicable tenant's lease, withhold its
     consvvent to any such sublease, transfer or assignment, in which event
     Tenant shall indemnify, defend and hold Landlord harmless from and against
     all claims, actions, damages, liabilities, costs and expenses (including
     court costs and attorneys' fees) asserted against or sustained by Landlord
     by reason of such withholding of consent.

     C.   Enforcement. In the event of the occurrence of an event described in
          -----------
either clause (1) or (4) of subsection B above, Landlord shall use reasonable
efforts (but shall not be obligated to institute any legal action) to cause the
applicable tenant to cease such unpermitted use; provided, however, that if such
unpermitted use continues for 90 days or more and Landlord has not instituted
any legal action to cause such tenant to cease such unpermitted use, then Tenant
shall be authorized, at Tenant's expense and as Landlord's agent, to institute
legal action to cause such tenant to cease such unpermitted use, in which event
Tenant shall indemnify, defend and hold Landlord harmless from and against all
claims, actions, damages, liabilities, costs and expenses (including court costs
and attorneys' fees) asserted against or sustained by Landlord by reason of such
legal action.

                                       33

<PAGE>

         29. SIGNAGE. Tenant, at Tenant's expense, shall have the right during
the Term to maintain a pylon sign at a location designated by Landlord north of
the Building and visible from the Interstate 90 Tollway. The design of Tenant's
pylon sign shall be in compliance with all applicable codes, ordinances, laws,
regulations and statutes and the Declaration and further subject to Landlord's
reasonable approval and supervision. The pylon shall not exceed 15 feet in
height and shall have no more than two sign surfaces, each such surface not to
exceed 100 square feet. The parties shall agree upon a vendor to prepare and
install the sign, and Tenant shall arrange for said vendor to prepare a to scale
rendering of the proposed sign for Landlord's approval. Once Landlord has
approved the signage, Tenant shall be responsible for obtaining any signage
permit or license required. Tenant shall pay the cost of such signage and
installation. Tenant acknowledges that Landlord has made no representation,
warranty or covenant that Tenant can obtain all approvals, permits and licenses
for Tenant's desired sign (and the failure to obtain any such approval, permit
or license shall not affect Tenant's other obligations under this Lease, shall
not give rise to any abatement of Rent or other credit and shall not constitute
a default by Landlord). It shall be a condition of Tenant's right to maintain
such pylon sign that (a) Tenant is not in Default under this Lease and (b) this
Lease is in full force and effect. It shall be a further condition of Tenant's
right to maintain such pylon sign that Tenant is an occupant of at least 20,000
rentable square feet of space in the Building (not including occupancy of any
subtenants or assignees other than Affiliates). Landlord shall install and
maintain the pylon sign at Tenant's expense. Upon the expiration or termination
of the Term or Tenant's right to retain such signage, Landlord, at Tenant's
expense, may remove the pylon sign. The rights granted to Tenant in this Section
29 are personal to The University of Phoenix, Inc. and shall not inure for the
benefit of any subtenant or assignee (other than an Affiliate).

         30. TEMPORARY SPACE. Landlord grants a license to Tenant to use certain
space on the second floor of the Building, consisting of approximately 1,029
rentable square feet (the "Temporary Space"), as shown on Exhibit E attached
hereto, for Tenant to conduct business operations while Landlord performs the
Work described in the Work Letter Agreement. Tenant's occupancy of the Temporary
Space shall be upon all of the same terms and provisions as are contained in
this Lease with respect to the Premises, except as follows:

             (1) Tenant shall pay Base Rent for the Temporary Space in the
         amount of $1,444.89 per month. Furthermore, Tenant shall pay Adjustment
         Rent for the Temporary Space and Tenant's Proportionate Share therefore
         shall be 0.550%. Base Rent and Adjustment Rent for the Temporary Space
         shall be payable in the manner set forth in Section 2. Tenant shall pay
         for all electricity and building services used in the Temporary Space;

             (2) Tenant's right to occupy the Temporary Space shall commence
         on November 26, 2001 and, subject to clause (5) below, shall expire on
         the first to occur of (i) substantial completion of the Work, (ii)
         March 31, 2002 (unless the current tenant of the Temporary Space
         agrees, in its sole and absolute discretion, to allow an

                                       34

<PAGE>

         extension of the period of Tenant's occupancy), or (iii) the date that
         this Lease is terminated;

                  (3) Tenant shall accept the Temporary Space in its "as-is"
         physical condition, without any representation, credit or allowance
         from Landlord with respect to the condition or improvement thereof,
         provided, however, at Tenant's option, Landlord, at Landlord's expense,
         shall construct two offices within the Temporary Space. If Landlord
         constructs such offices and the succeeding tenant of such space desires
         the demolition of the offices, Tenant shall reimburse Landlord for the
         reasonable costs of such demolition;

                  (4) It shall be a condition of Tenant's right to occupy the
         Temporary Space that this Lease is in full force and effect and Tenant
         is not in Default under this Lease at any time while Tenant is
         occupying the Temporary Space; and

                  (5) The current tenant of the Temporary Space has the right to
         reclaim the Temporary Space effective as of the last day of any
         calendar month. If the current tenant reclaims the Temporary Space,
         Landlord shall have the right, upon not less than 20 days prior written
         notice to Tenant, to terminate Tenant's license of the Temporary Space.
         Tenant agrees to vacate the Temporary Space on or before the effective
         termination date of the license. Furthermore, if Tenant still requires
         the use of temporary space, Landlord shall arrange for Tenant to have
         available for its use two rooms at one of the hotels in the Complex and
         Landlord shall reimburse Tenant, monthly, for any room charges for such
         rooms in excess of the amount Tenant would otherwise have paid to
         Landlord for the Temporary Space pursuant to clause (1) above.

         31. AUTHORITY. Landlord represents and warrants to Tenant that the
individual executing this Lease on behalf of Landlord is authorized to do so.
Upon written request from Tenant, Landlord will deliver to Tenant a copy of a
resolution or other document evidencing such authority. Landlord has good and
marketable fee simple title to the Building, including the Premises, with full
right and authority to grant the estate demised herein and to execute and
perform all of the terms and conditions of this Lease. Tenant represents and
warrants to Landlord that the individual executing this Lease on behalf of
Tenant is authorized to do so. Upon written request from Landlord, Tenant will
deliver to Landlord a copy of a resolution or other document evidencing such
authority.

                     [Signatures are on the following page]

                                       35

<PAGE>

         IN WITNESS WHEREOF, Landlord and Tenant have executed this Lease as of
the day and year first above written.

LANDLORD:                                         TENANT:
--------                                          ------

WINDY  POINT  OF  SCHAUMBURG                      THE APOLLO GROUP, INC., an
L.L.C., a  Delaware limited liability company     Arizona corporation

By:      FRC WINDY POINT L.L.C., an Illinois      By:    /s/ [ILLEGIBLE]
                                                      -------------------------
         limited liability company, its managing  Title:     President
         member                                          ----------------------

         By:    /s/ Steven D. FiField
             ----------------------------
         Title:     Managing Member
                -------------------------

                                       36

<PAGE>

                           (Landlord's Acknowledgment)

STATE OF ILLINOIS  )
                   )  SS.
COUNTY OF COOK     )

         On this ______________ day of __________________, 2001, before me
appeared ____________________________________________, to me personally known,
who being by me duly sworn, did say that he/she is the ____________________ of
FRC WINDY POINT, L.L.C., an Illinois limited liability company ("Manager") and
managing member of WINDY POINT OF SCHAUMBURG L.L.C., a Delaware limited
liability company ("Owner"), the company that executed the within and foregoing
instrument and that said instrument was signed and sealed in behalf of said
Manager and Owner, and said __________________________________ acknowledged said
instrument to be the free act and deed of said Manager and Owner.

                                                  ______________________________
                                                           NOTARY PUBLIC

                                       37

<PAGE>

                        (Tenant Corporate Acknowledgment)

STATE OF ARIZONA  )
                  )  SS.
COUNTY OF MARICOPA)

     On this 16/th/ day of November, 2001, before me appeared Todd S. Nelson, to
me personally known, who being by me duly sworn, did say that (he) (she) is the
President of THE APOLLO GROUP, INC., an Arizona corporation, the corporation
that executed the within and foregoing instrument and that said instrument was
signed and sealed in behalf of said corporation by authority of its Board of
Directors, and that the seal affixed is the corporate seal of said corporation
and said President acknowledged said instrument to be the free act and deed of
said corporation.

=====================================            /s/ Erin M. Hugus
 [LOGO]    "OFFICIAL SEAL"                       ------------------------------
            Erin M. Hugus                                  NOTARY PUBLIC
         Notary Public-Arizona
            Maricopa County
    My Commission Expires 11/12/2004
=====================================

                                       38

<PAGE>

                                     EXHIBIT A

                                   [FLOOR PLAN]<PAGE>

                                 EXHIBIT 10.118

               LEASE AGREEMENT WITH GLOBAL KNOWLEDGE NETWORK, INC.
                     FOR A PORTION OF WINDY POINT 1 BUILDING

<PAGE>

                            WINDY POINT OF SCHAUMBURG

                                  OFFICE LEASE

                                     BETWEEN

                        WINDY POINT OF SCHAUMBURG L.L.C.
                                   as Landlord

                                       AND

                         GLOBAL KNOWLEDGE NETWORK, INC.
                                    as Tenant

Dated: DECEMBER 9, 1999

<PAGE>

                                TABLE OF CONTENTS
                                -----------------

<TABLE>
<S>                                                                           <C>
1.    DEMISE AND TERM. .....................................................   1

2.    RENT. ................................................................   2
      A.   Definitions. ....................................................   2
           -----------
      B.   Components of Rent. .............................................   3
           ------------------
      C.   Payment of Rent. ................................................   4
           ---------------

3.    USE. .................................................................   5

4.    CONDITION OF PREMISES. ...............................................   5
      A.   Initial Condition ...............................................   5
           -----------------
      B.   Americans With Disabilities Act .................................   5
           -------------------------------

5.    BUILDING SERVICES. ...................................................   6
      A.   Basic Services. .................................................   6
           --------------
      B.   Electricity. ....................................................   7
           -----------
      C.   Telephones. .....................................................   7
           ----------
      D.   Additional Services. ............................................   8
           -------------------
      E.   Failure or Delay in Furnishing Services. ........................   8
           ---------------------------------------

6.    RULES AND REGULATIONS. ...............................................   9

7.    CERTAIN RIGHTS RESERVED TO LANDLORD. .................................   9

8.    MAINTENANCE AND REPAIRS. .............................................  10

9.    ALTERATIONS. .........................................................  10
      A.   Requirements. ...................................................  10
           ------------
      B.   Liens. ..........................................................  11
           -----

10.   INSURANCE. ...........................................................  11
      A.   Tenant's Insurance. .............................................  11
           ------------------
      B.   Mutual Waiver of Subrogation. ...................................  12
           ----------------------------

11.   WAIVER AND INDEMNITY. ................................................  12
      A.   Waiver. .........................................................  12
           ------
      B.   Tenant's Indemnity. .............................................  13
           ------------------
      C.   Landlord's Indemnity. ...........................................  13
           --------------------

12.   FIRE AND CASUALTY. ...................................................  13
</TABLE>

                                       i

<PAGE>

<TABLE>
<S>                                                                           <C>
13.   CONDEMNATION. ........................................................  14

14.   ASSIGNMENT AND SUBLETTING. ...........................................  14
      A.   Landlord's Consent. .............................................  14
           ------------------
      B.   Standards for Consent. ..........................................  16
           ---------------------
      C.   Recapture. ......................................................  16
           ---------

15.   SURRENDER. ...........................................................  17

16.   DEFAULTS AND REMEDIES. ...............................................  17
      A.   Default. ........................................................  17
           -------
      B.   Right of Re-Entry. ..............................................  17
           -----------------
      C.   Reletting. ......................................................  18
           ---------
      D.   Termination of Lease. ...........................................  18
           --------------------
      E.   Other Remedies. .................................................  18
           --------------
      F.   Bankruptcy. .....................................................  18
           ----------
      G.   Waiver of Trial by Jury. ........................................  18
           -----------------------

17.   HOLDING OVER. ........................................................  19

19.   [Intentionally Deleted). .............................................  20

20.   ESTOPPEL CERTIFICATES. ...............................................  20

21.   SUBORDINATION. .......................................................  21

22.   QUIET ENJOYMENT. .....................................................  21

23.   BROKER. ..............................................................  22

24.   NOTICES. .............................................................  22

25.   MISCELLANEOUS. .......................................................  22
      A.   Successors and Assigns. .........................................  22
           ----------------------
      B.   Entire Agreement. ...............................................  23
           ----------------
      C.   Time of Essence. ................................................  23
           ---------------
      D.   Execution and Delivery. .........................................  23
           ----------------------
      E.   Severability. ...................................................  23
           ------------
      F.   Governing Law. ..................................................  23
           -------------
      G.   Attorneys' Fees. ................................................  23
           ---------------
      H.   Delay in Possession. ............................................  23
           -------------------
      I.   Joint and Several Liability. ....................................  23
           ---------------------------
      J.   Force Majeure. ..................................................  23
           -------------
</TABLE>

                                       ii

<PAGE>

<TABLE>
<S>                                                                                     <C>
      K.   Captions. .................................................................  23
           --------
      L.   No Waiver. ................................................................  24
           ---------
      M.   No Recording. .............................................................  24
           ------------
      N.   Limitation of Liability. ..................................................  24
           -----------------------

26.   PARKING. .......................................................................  24

27.   LANDLORD'S TERMINATION OPTION. .................................................  24
      A.   Termination Option. .......................................................  24
           ------------------
      B.   Terms. ....................................................................  25
           -----

28.   RENEWAL OPTION. ................................................................  25
      A.   Renewal Option. ...........................................................  25
           --------------
      B.   Terms. ....................................................................  25
           -----
      C.   Amendment. ................................................................  26
           ---------
      D.   Termination. ..............................................................  26
           -----------

EXHIBIT A - Plan of Premises. ........................................................  A-1
EXHIBIT B - Rules and Regulations. ...................................................  B-1
EXHIBIT C - Work Letter Agreement. ...................................................  C-1
EXHIBIT D - Suite Acceptance Agreement. ..............................................  D-1
EXHIBIT E - Form of Subordination, Non-Disturbance and Attornment Agreement . ........  E-1
EXHIBIT F - Current Janitorial Specifications ........................................  F-1
EXHIBIT G - Form of Letter of Credit .................................................  G-1
</TABLE>

                                      iii

<PAGE>

                                  OFFICE LEASE

         THIS LEASE is made as of December 9, 1999, between WINDY POINT OF
SCHAUMBURG L.L.C., a Delaware limited liability company, having an address at
c/o Fifield Realty Corp., 20 North Wacker Drive, Chicago, Illinois 60606
("Landlord"), and GLOBAL KNOWLEDGE NETWORK, INC., a Delaware corporation, having
an address at One Van De Graff Drive, Burlington, Massachusetts 01803
("Tenant"), for space in the building at 1500 McConnor Parkway, in the office
complex known as Windy Point of Schaumburg (such building, including the land
upon which the building and related facilities are situated, being herein
referred to as the "Building"). The following schedule (the "Schedule") sets
forth certain basic terms of this Lease:

                                    SCHEDULE
                                    --------

 1.      Premises: .............................        A)  Suite 500
                                                        B)  Approximately 22,028
                                                            rentable square feet

    Base Rent:
    ---------

<TABLE>
<CAPTION>
                                        2.                      3.
               Year of Term            Annual Base Rent        Monthly Base Rent
               ------------            ----------------        -----------------
               <S>                     <C>                     <C>
                    1                    $371,171.76               $30,930.98
                    2                     382,306.92                31,858.91
                    3                     393,776.16                32,814.68
                    4                     405,589.44                33,799.12
                    5                     417,757.08                34,813.09
                    6                     430,289.88                35,857.49
                    7                     443,198.52                36,933.21
                    8                     456,494.52                38,041.21
                    9                     470,189.28                39,182.44
                    10                    484,295.04                40,357.92
</TABLE>

<TABLE>
<S>                       <C>
4.     Tenant's Proportionate Share:. ................................................ 11.785%
5.     Security Deposit:. .......................................... $100,000 Letter of Credit
6.     Commencement Date:. ....................................................... May 1, 2000
 7.    Expiration Date:. ...................................................... April 30, 2010
 8.    Brokers:. ........ Fifield Realty Corp., Corporate Realty Advisors and CB Richard Ellis
 9.    Brokerage Agreement:. .............. Agreement dated November 17, 1999 between Landlord
                                              and Brokers.
</TABLE>

         1.   DEMISE AND TERM. Landlord leases to Tenant and Tenant leases from
Landlord the premises (the "Premises") described in Item 1 of the Schedule and
shown on the

<PAGE>

plan attached hereto as Exhibit A, subject to the covenants and conditions set
forth in this Lease, for a term (the "Term") commencing on the date described in
Item 6 of the Schedule (the "Commencement Date") and expiring on the date (the
"Expiration Date") that immediately precedes the tenth anniversary of the
Commencement Date, unless terminated earlier as otherwise provided in this Lease
(or, if such anniversary of the Commencement Date is not the first day of a
calendar month, the Expiration Date shall be the last day of the month in which
the tenth anniversary of the Commencement Date occurs). Tenant may occupy the
Premises for the conduct of business prior to the Commencement Date, provided
such occupancy shall be upon all of the terms and conditions of this Lease other
than the obligations to pay Base Rent and Adjustment Rent (as hereinafter
defined) for such period prior to the Commencement Date. Tenant shall complete
and furnish to Landlord, on or before occupancy of the Premises, the Suite
Acceptance Agreement attached hereto as Exhibit D, which shall acknowledge the
actual Commencement Date and Expiration Date.

     2.  RENT.

     A.  Definitions. For purposes of this Lease, the following terms shall have
         -----------
the following meanings:

               (i) "Expenses" shall mean all expenses, costs and disbursements
     (other than Taxes) paid or incurred by Landlord in connection with the
     ownership, management, maintenance, operation, replacement and repair of
     the Building. Expenses shall not include: (a) costs of tenant alterations;
     (b) costs of capital improvements (except for costs of any capital
     improvements made or installed for the purpose of reducing Expenses or made
     or installed pursuant to governmental requirement or insurance requirement,
     which costs shall be amortized by Landlord in accordance with sound
     accounting and management principles); (c) interest and principal payments
     on mortgages (except interest on the cost of any capital improvements for
     which amortization may be included in the definition of Expenses) or any
     rental payments on any ground leases (except for rental payments which
     constitute reimbursement for Taxes and Expenses); (d) advertising expenses
     and leasing commissions; (e) any cost or expenditure for which Landlord is
     reimbursed, whether by insurance proceeds or otherwise, except through
     Adjustment Rent (hereinafter defined); (f) the cost of any kind of service
     furnished to any other tenant in the Building which Landlord does not
     generally make available to all tenants in the Building;(g) legal expenses
     of negotiating leases, (h) costs of special services rendered to individual
     tenants (including Tenant) for which a special charge is made, (i) costs of
     repairs directly resulting from the negligence or willful misconduct of
     Landlord, its agents or employees, (j) costs for which Landlord is
     reimbursed by other tenants of the Building other than through payment of
     tenants' shares of Expenses and Taxes,(k) fines or penalties incurred due
     to Landlord's violation of any law and (l) management fees substantially in
     excess of the management fees then generally charged by managers of
     comparable office buildings in the Chicago metropolitan area. Expenses
     shall be determined on a cash or accrual basis, as Landlord

                                       2

<PAGE>

     may elect (provided Landlord shall not change such method of determining
     Expenses during the Term).

               (ii)   "Rent" shall mean Base Rent, Adjustment Rent and any other
     sums or charges due by Tenant hereunder.

               (iii)  "Taxes" shall mean all taxes, assessments and fees levied
     upon the Building, the property of Landlord located therein or the rents
     collected therefrom, by any governmental entity based upon the ownership,
     leasing, renting or operation of the Building, including all costs and
     expenses of protesting any such taxes, assessments or fees. Taxes shall not
     include any net income, capital stock, succession, transfer, franchise,
     gift, estate or inheritance taxes; provided, however, if at any time during
     the Term, a tax or excise on income is levied or assessed by any
     governmental entity, in lieu of or as a substitute for, in whole or in
     part, real estate taxes or other ad valorem taxes, such tax shall
                                      ----------
     constitute and be included in Taxes. For the purposes of determining Taxes
     for any given year, the amount to be included for such year (a) from
     special assessments payable in installments shall be the amount of the
     installments (and any interest) due and payable during such year, and (b)
     from all other Taxes shall at Landlord's election either be the amount
     accrued, assessed or otherwise imposed for such year or the amount due and
     payable in such year (provided Landlord shall not change such method of
     determining Taxes during the Term).

               (iv)   "Tenant's Proportionate Share" shall mean the percentage
     set forth in Item 4 of the Schedule which has been determined by dividing
     the rentable square feet in the Premises (i.e., the number of rentable
     square feet stated in Item 1B of the Schedule) by the rentable square feet
     in the Building (i.e., 186,921).

     B.  Components of Rent. Tenant agrees to pay the following amounts to
         ------------------
Landlord at the office of the Building or at such other place as Landlord
designates:

               (i)    Base rent ("Base Rent") to be paid in monthly installments
     in the amount set forth in Item 3 of the Schedule in advance on or before
     the first day of each month of the Term, except that Tenant shall pay the
     first month's Base Rent upon execution of this Lease.

               (ii)   Adjustment rent ("Adjustment Rent") in an amount equal to
     Tenant's Proportionate Share of (a) the Expenses for any calendar year and
     (b) the Taxes for any calendar year. Prior to each calendar year, Landlord
     shall estimate the amount of Adjustment Rent due for such year, and Tenant
     shall pay Landlord one-twelfth of such estimate on the first day of each
     month during such year. Such estimate may be revised by Landlord whenever
     it obtains information relevant to making such estimate more accurate.
     After the end of each calendar year, Landlord shall deliver to Tenant a
     report setting forth the actual Expenses and Taxes for such calendar year
     and a statement of the

                                        3

<PAGE>

     amount of Adjustment Rent that Tenant has paid and is payable for such
     year. Within thirty days after receipt of such report, Tenant shall pay to
     Landlord the amount of Adjustment Rent due for such calendar year minus any
     payments of Adjustment Rent made by Tenant for such year. If Tenant's
     estimated payments of Adjustment Rent exceed the amount due Landlord for
     such calendar year, Landlord shall apply such excess as a credit against
     Tenant's other obligations under this Lease or promptly refund such excess
     to Tenant if the Term has already expired, provided Tenant is not then in
     Default hereunder, in either case without interest to Tenant.

     C.  Payment of Rent. The following provisions shall govern the payment of
         ---------------
Rent: (i) if this Lease commences or ends on a day other than the first day or
last day of a calendar year, respectively, the Rent for the year in which this
Lease so begins or ends shall be prorated and the monthly installments shall be
adjusted accordingly; (ii) all Rent shall be paid to Landlord without offset or
deduction, and the covenant to pay Rent shall be independent of every other
covenant in this Lease; (iii) if during all or any portion of any year the
Building is not fully rented and occupied, Landlord may elect to make an
appropriate adjustment of Expenses and/or Taxes for such year to determine the
Expenses and/or Taxes that would have been paid or incurred by Landlord had the
Building been fully rented and occupied for the entire year and the amount so
determined shall be deemed to have been the Expenses and/or Taxes for such year;
(iv) any sum due from Tenant to Landlord which is not paid within five days
after its due date shall bear interest from the date due until the date paid at
the annual rate of 14% per annum, but in no event higher than the maximum rate
permitted by law (the "Default Rate"); and, in addition, Tenant shall pay
Landlord a late charge for any Rent payment which is paid more than five days
after its due date equal to 5% of such payment; (v) if changes are made to this
Lease or the Building changing the number of square feet contained in the
Premises or in the Building, Landlord shall make an appropriate adjustment to
Tenant's Proportionate Share; (vi) Tenant shall have the right, upon reasonable
prior written notice to Landlord, to inspect Landlord's accounting records
relative to Expenses and Taxes during normal business hours at any time within
60 days following the furnishing to Tenant of the annual statement of Adjustment
Rent; and, unless Tenant shall take written exception to any item in any such
statement within such 60-day period, such statement shall be considered as final
and accepted by Tenant. Tenant must timely pay all Adjustment Rent billed by
Landlord pending the outcome of its inspection or any audit of Landlord's
accounting records. If Tenant makes such timely written exception, an audit as
to the proper amount of Adjustment Rent for such period shall be performed by an
independent certified public accounting firm selected by Landlord, but subject
to Tenant's reasonable approval, which audit shall be final and conclusive. If
the results of such audit reveal that Tenant has overpaid or underpaid
Adjustment Rent for the applicable year, Landlord shall pay to Tenant such
overpayment or Tenant shall pay to Landlord such underpayment, as applicable,
within 30 days after the results of such audit are reported to the parties.
Tenant agrees to pay the entire cost of such audit unless it is determined that
Landlord's original determination of the Adjustment Rent for the year in issue
was in error by more than 5%, in which case Landlord agrees to pay one-half of
the cost of such audit; (vii) in the event of the termination of this Lease
prior to the determination of any Adjustment Rent, Tenant's agreement to pay any
such sums and

                                        4

<PAGE>

Landlord's obligation to refund any such sums (provided Tenant is not in default
hereunder) shall survive the termination of this Lease; (viii) no adjustment to
the Rent by virtue of the operation of the rent adjustment provisions in this
Lease shall result in the payment by Tenant in any year of less than the Base
Rent shown on the Schedule; (ix) Landlord may at any time change the fiscal year
of the Building; (x) each amount owed to Landlord under this Lease for which the
date of payment is not expressly fixed shall be due on the same date as the Rent
listed on the statement showing such amount is due; and (xi) if Landlord fails
to give Tenant an estimate of Adjustment Rent prior to the beginning of any
calendar year, Tenant shall continue to pay Adjustment Rent at the rate for the
previous calendar year until Landlord delivers such estimate.

     3.  USE. Tenant agrees that it shall occupy and use the Premises only as
business offices and classrooms for corporate training and technical education
of employees of Tenant's clients and for no other purposes (and in no event as
an elementary or high school, college or university, vocational school, driving
school or other such school). Tenant shall comply with all federal, state and
municipal laws, ordinances and regulations and all covenants, conditions and
restrictions of record applicable to Tenant's use or occupancy of the Premises.
Without limiting the foregoing, Tenant shall not cause, nor permit, any
hazardous or toxic substances to be brought upon, produced, stored, used,
discharged or disposed of in, on or about the Premises without the prior written
consent of Landlord and then only in compliance with all applicable
environmental laws.

     4.  CONDITION OF PREMISES.

     A.  Initial Condition. Tenant's taking possession of the Premises shall be
         -----------------
conclusive evidence that the Premises were in good order and satisfactory
condition when Tenant took possession. No agreement of Landlord to alter,
remodel, decorate, clean or improve the Premises or the Building (or to provide
Tenant with any credit or allowance for the same), and no representation
regarding the condition of the Premises or the Building, have been made by or on
behalf of Landlord or relied upon by Tenant, except as stated in the Work Letter
Agreement attached hereto as Exhibit C.

     B.  Americans With Disabilities Act. The parties acknowledge that the
         -------------------------------
Americans With Disabilities Act of 1990 (42 U.S.C. (S)12101 et seq.) and
regulations and guidelines promulgated thereunder, as amended and supplemented
from time to time (collectively referred to herein as the "ADA") establish
requirements under Title III of the ADA ("Title III") pertaining to business
operations, accessibility and barrier removal, and that such requirements may be
unclear and may or may not apply to the Premises and the Building. The parties
acknowledge and agree that Tenant has been provided an opportunity to inspect
the Premises and the Building sufficient to determine whether or not the
Premises and the Building in their condition as of the date hereof deviate in
any manner from the ADA Accessibility Guidelines ("ADAAG") or any other
requirements under the ADA pertaining to the accessibility of the Premises or
the Building. Tenant further acknowledges and agrees that to the extent that
Landlord prepares, reviews or approves any of plans or specifications relating
to leasehold improvements in the Premises, such

                                        5

<PAGE>

action shall in no event be deemed any representation or warranty that the same
comply with any requirements of the ADA. Notwithstanding anything to the
contrary in this Lease, the parties hereby agree to allocate responsibility for
Title III compliance as follows: (a) Tenant shall be responsible for all Title
III compliance and costs in connection with the Premises, including structural
work, if any, and including any leasehold improvements or other work to be
performed in the Premises under or in connection with this Lease, and (b)
Landlord shall perform, and Tenant shall be responsible for the cost of, any
so-called Title III "path of travel" requirements triggered by any construction
activities or alterations in the Premises. Landlord covenants and agrees that
during the Term, Landlord shall cause the ground floor common areas of the
Building, the entrances to the Building which provide public access to the
Building, and the parking areas serving the Building, to comply with the
requirements (as reasonably interpreted from time to time) of Title III. Tenant
understands and agrees that the costs and expenses of such compliance shall be
included in Expenses. Except as set forth above with respect to Landlord's Title
III obligations, Tenant shall be solely responsible for all other requirements
under the ADA relating to Tenant or any affiliates or persons or entities
related to Tenant (collectively, "Affiliates"), operations of Tenant or
Affiliates, or the Premises, including, without limitation, requirements under
Title I of the ADA pertaining to Tenant's employees.

     5.  BUILDING SERVICES.

     A.  Basic Services. Landlord shall furnish the following services: (i)
         --------------
heating and air conditioning to provide a temperature condition required for
comfortable occupancy of the Premises under normal business operations and
consistent with the heating and air conditioning services provided in comparable
office buildings in and around Schaumburg, Illinois. The heating and air
conditioning for the Premises is provided through "heat pumps" which may be
controlled by Tenant (i.e., Tenant controls the hours of operation and the
temperature settings); (ii) water for drinking, and, subject to Landlord's
approval, water at Tenant's expense for any private restrooms and office kitchen
requested by Tenant; (iii) men's and women's restrooms at locations designated
by Landlord and in common with other tenants of the Building; (iv) daily janitor
service in the Premises and common areas of the Building, weekends and holidays
excepted, including periodic outside window washing of the perimeter windows in
the Premises (the current specifications for the janitor service to be provided
by Landlord are attached as Exhibit F, provided Landlord reserves the right to
alter such specifications from time to time in Landlord's reasonable
discretion);(v) passenger elevator service in common with Landlord and other
tenants of the Building, 24 hours a day, 7 days a week; and (vi) freight
elevator service (as opposed to routine passenger elevator service) daily
between the hours of 7:00 a.m. and 6:00 p.m., weekends and holidays excepted.
Tenant must notify Landlord before bringing freight or large items into the
Building so Landlord can place pads on the walls of the elevator. If Landlord
reasonably believes that Tenant's use of the freight elevator service is
inconveniencing other tenants and occupants of the Building, upon five days
notice to Tenant, Landlord may thereafter prohibit Tenant from using freight
elevator service during one hour in the morning every day (such time to be
designated by Landlord in its sole discretion from time to time). Furthermore,
if Landlord reasonably believes that Tenant's use of the freight elevator
service is still inconveniencing other tenants and occupants of the Building,
upon five days notice to Tenant, Landlord may require that Tenant commence
making its morning deliveries between 6:00 a.m. and 7:00 a.m. (and Tenant shall
be responsible for the costs incurred by Landlord in having an engineer or
security guard at the Building during such hours). Finally, if Landlord
reasonably believes that Tenant's use of the freight elevator service is still
inconveniencing other tenants and occupants of the Building, Tenant must arrange
for partial deliveries on Sundays (taking up to four hours) so that all such
inconvenience during business

                                        6

<PAGE>

days at the start of the week is eliminated (and Tenant shall be responsible for
the costs incurred by Landlord in having an engineer or security guard at the
Building during such time). At all times that deliveries are being made to the
Premises, Tenant shall be responsible for causing the Premises to be accessible
for the delivery (and Landlord's engineer or security guard shall not be
expected to provide access to the Premises or to guard or protect Tenant's
property in the Premises or the Building). In addition to the foregoing, at
Tenant's election (and at Tenant's cost, as provided above), Tenant may commence
making deliveries at 6:00 a.m. on business days and may make deliveries for up
to four hours on Sundays. For purposes of this Section 5.A, "holidays" shall
mean New Years Day, Memorial Day, Independence Day, Labor Day, Thanksgiving and
Christmas, as well as, at Landlord's election, any other day that the majority
of comparable office buildings in Schaumburg, Illinois treat as a public
holiday.

     B.  Electricity. Electricity shall be distributed to the Premises by the
         -----------
electric utility company serving the Building (as designated by Landlord from
time to time) and Landlord shall permit Landlord's wire and conduits, to the
extent available, suitable and safely capable, to be used for such distribution.
Tenant at its cost shall make all necessary arrangements with the electric
utility company for metering and paying for electric current furnished to the
Premises. All electricity used during the performance of janitor service, or the
making of any alterations or repairs in the Premises, or the operation of any
special air conditioning systems serving the Premises, shall be paid for by
Tenant. The heat pumps providing heating and air conditioning services for the
Premises draw upon the Building's electric supply (and the costs of such
electricity consumed during the Building's standard hours of operation shall be
included in Expenses).

     C.  Telephones. Tenant shall be responsible for arranging for its own
         ----------
telecommunications services at the Premises. All telegraph, telephone, and
electric connections which Tenant may desire shall be first approved by Landlord
in writing (which approval shall not be unreasonably withheld, conditioned or
delayed), before the same are installed, and the location of all wires and the
work in connection therewith shall be performed by contractors approved by
Landlord and shall be subject to the direction of Landlord. Landlord reserves
the right to designate and control the entity or entities providing telephone or
other communication cable installation, repair and maintenance in the Building
and to restrict and control access to telephone cabinets. If Landlord designates
a particular vendor or vendors to provide telephone and data cable installation,
repair and maintenance for the Building, Tenant agrees to abide by and
participate in such program. Tenant shall be responsible for and shall pay all
costs incurred in connection with the installation of telephone cables and
related wiring in the Premises, including, without limitation, any hook-up,
access and maintenance fees related to the installation of such wires and cables
in the Premises and the commencement of services therein, and the maintenance
thereafter of such wire and cables; and there shall be included in Expenses for
the Building all installation, hook-up or maintenance costs incurred by Landlord
in connection with telephone cables and related wiring in the Building which are
not allocable to any individual users of such service but are allocable to the
Building generally. If Tenant fails to maintain all telephone cables and related
wiring in the Premises and such failure affects or interferes with the operation
or maintenance of any other telephone cables or related wiring in the Building,
Landlord or any vendor hired by Landlord may enter into and upon the Premises
forthwith and perform such repairs, restorations or alterations as Landlord
deems necessary in order to eliminate any such interference (and Landlord may
recover from Tenant all of Landlord's costs in connection therewith). Upon
expiration of the Term hereof Tenant shall remove all telephone cables and
related wiring installed by or for Tenant which Landlord requests Tenant to
remove. Tenant

                                        7

<PAGE>

agrees that neither Landlord nor any of its agents or employees shall be liable
to Tenant, or any of Tenant's employees, agents, customers or invitees or anyone
claiming through, by or under Tenant, for any damages, injuries, losses,
expenses, claims or causes of action because of any interruption, diminution,
delay or discontinuance at any time for any reason in the furnishing of any
telecommunications service to the Premises or the Building.

     D.  Additional Services. The standard hours of operation of the Building's
         -------------------
heating and air conditioning systems are Monday through Friday, 8:00 a.m. to
6:00 p.m., Saturdays, 8:00 a.m. to 1:00 p.m., holidays excepted. If Tenant
operates the heating and air conditioning systems serving the Premises beyond
the foregoing standard hours of operation, then (i) Tenant shall pay to Landlord
for such after-hours use of the heat pumps an amount equal to the product of (x)
the number of hours each such heat pump is used (as indicated by the DDC program
for the heat pump) multiplied by (y) the then-current hourly charge for
operating each heat pump for heating or cooling, as the case may be (which
charge shall include Landlord's electric costs, at the rates then charged by the
Building's electricity provider, and a reasonable fee to Landlord for
maintenance and repair of the heat pumps), and (ii) such operation will activate
the Building's fan system, and Tenant shall pay Landlord for such after-hours
operation of the Building's fan system at the rate of $16.00 per hour (subject
to increase by 3% per year each year of the Term [i.e., such rate will be $16.48
for the second year of the Term, $16.97 for the third year of the Term, $17.48
for the fourth year of the Term, and so on]). Furthermore, if due to an unusual
concentration of personnel or machinery in the Premises (compared to typical
office use), or an unusually large number of heat pumps serving the Premises
(compared to the number of heat pumps serving the other premises in the
Building), the heat pumps serving the Premises consume a disproportionate amount
of electricity, Tenant shall pay the costs and charges for such excess usage to
Landlord. Tenant shall pay all such costs relating to after-hours or excessive
use of the heating or air conditioning systems serving the Premises within 10
days after being billed therefor.

     Landlord shall not be obligated to furnish any services other than those
stated above in this Section 5. If Landlord elects to furnish services requested
by Tenant in addition to those stated above, Tenant shall pay Landlord's then
prevailing charges for such services. If Tenant shall fail to make any such
payment, Landlord may, without notice to Tenant and in addition to all other
remedies available to Landlord, discontinue any additional services. No
discontinuance of any such additional service shall result in any liability of
Landlord to Tenant or be considered as an eviction or a disturbance of Tenant's
use of the Premises. In addition, if Tenant's concentration of personnel or
equipment adversely affects the temperature or humidity in the Premises or the
Building, Landlord may install supplementary air conditioning units in the
Premises; and Tenant shall pay for the cost of installation and maintenance
thereof.

     E.  Failure or Delay in Furnishing Services. Tenant agrees that Landlord
         ---------------------------------------
shall not be liable for damages for failure or delay in furnishing any service
stated above if such failure or delay is caused, in whole or in part, by any one
or more of the events stated in Section 25J below, nor shall any such failure or
delay be considered to be an eviction or disturbance of Tenant's use of the
Premises, or relieve Tenant from its obligation to pay any Rent when due, or
from any

                                        8

<PAGE>

other obligations of Tenant under this Lease. Notwithstanding the foregoing, if
as a result of an act or omission of Landlord or any employee of Landlord (as
distinguished from an act or omission of Tenant or the occurrence of an event of
force majeure [as defined in Section 25J hereof] or the occurrence of a fire or
other casualty which is covered by Section 12 hereof), any service to the
Premises as described above is not furnished to the Premises and if as a result
thereof the Premises, or a "material part" (as defined below) of the Premises,
is rendered untenantable or inaccessible for a period of five consecutive
business days, and Tenant does not occupy the Premises, or such material part
thereof which is rendered untenantable or inaccessible, during such 5-business
day period, then as Tenant's sole remedy for such failure to furnish such
service, Base Rent and Adjustment Rent payable for such portion of the Premises
which Tenant does not so occupy shall abate for the period commencing on the
expiration of said five business day period and expiring on the date such
service is restored or Tenant is able to resume occupancy of the Premises or
such material part thereof, as the case may be. (As used herein, the phrase
"material part" shall mean an amount in excess of 20% of the Rentable Area of
the Premises.)

     6.  RULES AND REGULATIONS. Tenant shall observe and comply and shall cause
its subtenants, assignees, invitees, employees, contractors and agents to
observe and comply, with the rules and regulations listed on Exhibit B attached
hereto and with such reasonable modifications and additions thereto as Landlord
may make from time to time. Landlord shall not be liable for failure of any
person to obey such rules and regulations. Landlord shall not be obligated to
enforce such rules and regulations against any person, and the failure of
Landlord to enforce any such rules and regulations shall not constitute a waiver
thereof or relieve Tenant from compliance therewith.

     7.  CERTAIN RIGHTS RESERVED TO LANDLORD. Landlord reserves the following
rights, each of which Landlord may exercise without notice to Tenant (except as
otherwise provided) and without liability to Tenant, and the exercise of any
such rights shall not be deemed to constitute an eviction or disturbance of
Tenant's use or possession of the Premises and shall not give rise to any claim
for set-off or abatement of rent or any other claim: (a) to change the name or
street address of the Building or the suite number of the Premises (provided
that if such change is not required by any governmental or quasi-governmental
entity [e.g., the U.S. Postal Service], Landlord shall reimburse Tenant for the
cost of replacing stationery then in stock that is rendered obsolete due to such
change [not to exceed $2,000]); (b) to install, affix and maintain any and all
signs on the exterior or interior of the Building; (c) upon reasonable prior
oral or telephonic notice to Tenant at the Premises (excluding emergencies, when
no such notice shall be required) to make repairs, decorations, alterations,
additions, or improvements, whether structural or otherwise, in and about the
Building, and for such purposes to enter upon the Premises, temporarily close
doors, corridors and other areas in the Building and interrupt or temporarily
suspend services or use of common areas, and Tenant agrees to pay Landlord for
overtime and similar expenses incurred if such work is done other than during
ordinary business hours at Tenant's request; (d) to retain at all times, and to
use in appropriate instances, keys to all doors within and into the Premises;
(e) to grant to any person or to reserve unto itself the

                                        9

<PAGE>

exclusive right to conduct any business or render any service in the Building;
(f) upon reasonable prior oral or telephonic notice to Tenant at the Premises,
to show or inspect the Premises at reasonable times and, if vacated or
abandoned, to prepare the Premises for reoccupancy; (g) to install, use and
maintain in and through the Premises, pipes, conduits, wires and ducts serving
the Building, provided that such installation, use and maintenance does not
unreasonably interfere with Tenant's use of the Premises; and (h) to take any
other action which Landlord deems reasonable in connection with the operation,
maintenance or preservation of the Building.

     8.  MAINTENANCE AND REPAIRS. Tenant, at its expense, shall maintain and
keep the Premises in good order and repair at all times during the Term. In
addition, Tenant shall reimburse Landlord for the cost of any repairs to the
Building necessitated by the acts or omissions of Tenant, its subtenants,
assignees, invitees, employees, contractors and agents, to the extent Landlord
is not reimbursed for such costs under its insurance policies. Subject to the
preceding sentence, Landlord shall perform any maintenance or make any repairs
to the Building as Landlord shall desire or deem necessary for the safety,
operation or preservation of the Building, or as Landlord may be required or
requested to do by any governmental authority or by the order or decree of any
court or by any other proper authority.

     9.  ALTERATIONS.

     A.  Requirements. Tenant shall not make any replacement, alteration,
         ------------
improvement or addition to or removal from the Premises (collectively an
"alteration") without the prior written consent of Landlord, which consent shall
not be unreasonably withheld or delayed. Notwithstanding the foregoing, no
consent shall be necessary for any decorative or cosmetic alteration (or related
alteration) that (i) costs less than $15,000 (provided such alteration is not
part of related alterations which cost, in the aggregate, more than $15,000),
(ii) does not require the issuance of a building permit and (iii) does not
adversely affect the structural elements of the Building or the base Building
mechanical, electrical or plumbing systems, the architectural aesthetics of the
Building, the common areas of the Building or the use by other tenants in the
Building of their demised premises (provided that even if Landlord's consent is
not necessary for such an alteration, the following provisions of this Section
9A shall apply). In the event Tenant proposes to make any alteration, Tenant
shall, prior to commencing such alteration, submit to Landlord for prior written
approval: (i) detailed plans and specifications; (ii) sworn statements,
including the names, addresses and copies of contracts for all contractors;
(iii) all necessary permits evidencing compliance with all applicable
governmental rules, regulations and requirements; (iv) certificates of insurance
in form and amounts required by Landlord, naming Landlord and any other parties
designated by Landlord as additional insureds; and (v) all other documents and
information as Landlord may reasonably request in connection with such
alteration. Tenant agrees to reimburse Landlord for Landlord's actual
out-of-pocket costs and fees incurred in reviewing all such items and
supervising the alteration. Neither approval of the plans and specifications nor
supervision of the alteration by Landlord shall constitute a representation or
warranty by Landlord as to the accuracy, adequacy, sufficiency or propriety of
such plans and specifications or the quality of workmanship or the compliance of
such alteration

                                       10

<PAGE>

with applicable law. Tenant shall pay the entire cost of the alteration and, if
requested by Landlord, shall deposit with Landlord prior to the commencement of
the alteration, security for the payment and completion of the alteration in
form and amount required by Landlord. Each alteration shall be performed in a
good and workmanlike manner, in accordance with the plans and specifications
approved by Landlord, and shall meet or exceed the standards for construction
and quality of materials established by Landlord for the Building. In addition,
each alteration shall be performed in compliance with all applicable
governmental and insurance company laws, regulations and requirements. Each
alteration shall be performed by union contractors if required by Landlord and
in harmony with Landlord's employees, contractors and other tenants. Each
alteration, whether temporary or permanent in character, made by Landlord or
Tenant in or upon the Premises (excepting only Tenant's furniture, equipment and
trade fixtures) shall become Landlord's property and shall remain upon the
Premises at the expiration or termination of this Lease without compensation to
Tenant; provided, however, that Landlord shall have the right to require Tenant
to remove such alteration at Tenant's sole cost and expense in accordance with
the provisions of Section 15 of this Lease.

     B.  Liens. Upon completion of any alteration, Tenant shall promptly furnish
         -----
Landlord with sworn owner's and contractors statements and full and final
waivers of lien covering all labor and materials included in such alteration.
Tenant shall not permit any mechanic's lien to be filed against the Building, or
any part thereof, arising out of any alteration performed, or alleged to have
been performed, by or on behalf of Tenant. If any such lien is filed, Tenant
shall within ten days thereafter have such lien released of record or deliver to
Landlord a bond in form, amount, and issued by a surety satisfactory to
Landlord, indemnifying Landlord against all costs and liabilities resulting from
such lien and the foreclosure or attempted foreclosure thereof. If Tenant fails
to have such lien so released or to deliver such bond to Landlord, Landlord,
without investigating the validity of such lien, may pay or discharge the same;
and Tenant shall reimburse Landlord upon demand for the amount so paid by
Landlord, including Landlord's expenses and attorneys' fees.

     10. INSURANCE.

     A.  Tenant's Insurance. Tenant, at its expense, shall maintain at all times
         ------------------
during the Term the following insurance policies: (a) fire insurance, including
extended coverage, vandalism, malicious mischief, sprinkler leakage, water
damage and all risk coverage and demolition and debris removal, insuring the
full replacement cost of all improvements, alterations or additions to the
Premises made at Tenant's expense, and all other property owned or used by
Tenant and located in the Premises; (b) commercial general liability insurance,
including blanket contractual liability insurance, with respect to the Building
and the Premises, with limits to be set by Landlord from time to time but in any
event not less than $3,000,000 each occurrence combined single limit for bodily
injury, sickness or death or for damage to or destruction of property, including
loss of use thereof; (c) workers' compensation and occupational disease
insurance with Illinois statutory benefits and employers liability insurance
with limits of not less than $3,000,000 each accident, each disease and
aggregate for disease; and

                                       11

<PAGE>

(d) insurance against such other risks and in such other amounts as Landlord may
from time to time require. The form of all such policies and deductibles
thereunder shall be subject to Landlord's prior approval. All such policies
shall be issued by insurers acceptable to Landlord and licensed to do business
in Illinois. The insurance policies shall name Landlord, any mortgage lender
(currently Citigroup, Inc.), their respective affiliates, subsidiaries,
successors and assigns, the property manager and any other parties designated by
Landlord as additional insureds. All policies shall require at least thirty (30)
days' prior written notice to Landlord of termination or modification and shall
be primary and not contributory. Tenant shall at least ten (10) days prior to
the Commencement Date, and within ten (10) days prior to the expiration of each
such policy, deliver to Landlord certificates evidencing the foregoing insurance
or renewal thereof, as the case may be.

     B.  Mutual Waiver of Subrogation. Landlord and Tenant each agree that
         ----------------------------
neither Landlord nor Tenant (nor their respective successors or assigns) will
have any claim against the other for any loss, damage or injury to property
which is covered by insurance carried by either party (or, with respect to
Tenant, which would have been covered if Tenant had carried the insurance
required by this Lease), notwithstanding the negligence of either party in
causing the loss. The waiver also applies to each party's directors, officers,
employees, shareholders and agents. The waiver does not apply to claims caused
by a party's wilful misconduct.

     If despite a party's best efforts it cannot find an insurance company (in
the case of Tenant, meeting the requirements of Section 10A) that will allow a
waiver at reasonable commercial rates, then it shall give notice to the other
party within 30 days after discovering such situation. The other party shall
then have 30 days to find an insurance company that will allow the waiver. If
the other party cannot find such an insurance company, then both parties shall
be released from their obligation to obtain the waiver.

     If an insurance company is found but it will allow the waiver only at rates
greater than reasonable commercial rates, then the parties can agree to pay for
the waiver under any agreement they can negotiate. If the parties cannot in good
faith negotiate an agreement, then both parties shall be released from their
obligation to obtain the waiver.

     11. WAIVER AND INDEMNITY.

     A.  Waiver. Tenant releases Landlord, its property manager and their
         ------
respective agents and employees from, and waives all claims for, damage or
injury to person or property and loss of business sustained by Tenant and
resulting from the Building or the Premises or any part thereof or any equipment
therein becoming in disrepair, or resulting from any accident in or about the
Building. This paragraph shall apply particularly, but not exclusively, to
flooding, damage caused by Building equipment and apparatus, water, snow, frost,
steam, excessive heat or cold, broken glass, sewage, gas, odors, excessive noise
or vibration or the bursting or leaking of pipes, plumbing fixtures or sprinkler
devices. Without limiting the generality of the foregoing, Tenant waives all
claims and rights of recovery against Landlord, its property manager and their

                                       12

<PAGE>

respective agents and employees for any loss or damage to any property of
Tenant, which loss or damage is insured against, or required to be insured
against, by Tenant pursuant to Section 10 above, whether or not such loss or
damage is due to the fault or negligence of Landlord, its property manager or
their respective agents or employees, and regardless of the amount of insurance
proceeds collected or collectible under any insurance policies in effect.

     B. Tenant's Indemnity. Tenant agrees to indemnify, defend and hold harmless
        ------------------
Landlord, its property manager and their respective agents and employees, from
and against any and all claims, demands, actions, liabilities, damages, costs
and expenses (including reasonable attorneys' fees), for injuries to any third
parties and damage to or theft or misappropriation or loss of property of third
parties occurring in or about the Building and arising from the use and
occupancy of the Premises or from any activity, work, or thing done, permitted
or suffered by Tenant in or about the Premises (including, without limitation,
any alteration by Tenant) or from any breach or default on the part of Tenant in
the performance of any covenant or agreement on the part of Tenant to be
performed under this Lease or due to any other act or omission of Tenant, its
subtenants, assignees, invitees, employees, contractors and agents. Without
limiting the foregoing, Tenant shall indemnify, defend and hold Landlord
harmless from any claims, liabilities, damages, costs and expenses arising out
of the use or storage of hazardous or toxic materials in the Building by Tenant.
If any such proceeding is filed against Landlord or any such indemnified party,
Tenant agrees to defend Landlord or such party in such proceeding at Tenant's
sole cost by legal counsel reasonably satisfactory to Landlord, if requested by
Landlord.

     C. Landlord's Indemnity. Subject to the provisions of Section 25N below,
        --------------------
Landlord agrees to indemnify, defend and hold harmless Tenant and its agents and
employees, from and against any and all claims, demands, actions, liabilities,
damages, costs and expenses (including reasonable attorneys' fees), for injuries
to any third parties and damage to or theft or misappropriation or loss of
property of third parties occurring in or about the Building and arising from
any breach or default on the part of Landlord in the performance of any covenant
or agreement on the part of Landlord to be performed under this Lease or due to
any other negligent act or omission or wilful misconduct of Landlord, its
employees, contractors and agents. If any such proceeding is filed against
Tenant or any such indemnified party, Landlord agrees to defend Tenant or such
party in such proceeding at Landlord's sole cost by legal counsel reasonably
satisfactory to Tenant, if requested by Tenant. Notwithstanding anything
contained in this Section 11C to the contrary, Landlord shall not be required to
indemnify Tenant or its agents and employees from or in respect of any claim or
matter which results from the negligence or wilful misconduct of Tenant or its
agents and employees.

     12. FIRE AND CASUALTY. Upon a fire or other casualty affecting the
Building, Landlord, with reasonable diligence, shall restore the Building.
Notwithstanding the foregoing, if all or a substantial part of the Premises or
the Building is rendered untenantable by reason of fire or other casualty,
Landlord may, at its option, either restore the Premises and the Building, or
terminate this Lease effective as of the date of such fire or other casualty.
Landlord agrees to give Tenant written notice within 60 days after the
occurrence of any such fire or other casualty

                                       13

<PAGE>

designating whether Landlord elects to so restore or terminate this Lease. If
Landlord elects to terminate this Lease, Rent shall be paid through and
apportioned as of the date of such fire or other casualty. If Landlord elects to
restore, Landlord's obligation to restore the Premises shall be limited to
restoring those improvements in the Premises existing as of the date of such
fire or other casualty which were made at Landlord's expense and shall exclude
any furniture, equipment, fixtures, additions, alterations or improvements in or
to the Premises which were made at Tenant's expense. If Landlord elects to
restore, Rent shall abate for that part of the Premises which is untenantable on
a per diem basis from the date of such fire or other casualty until Landlord has
substantially completed its repair and restoration work, provided that Tenant
does not occupy such part of the Premises during said period. Notwithstanding
anything contained in this Section 12 to the contrary, within 60 days after the
date of any fire or other casualty which renders all or a substantial part of
the Premises or the Building untenantable, Landlord shall provide to Tenant in
writing Landlord's good faith estimate of the time required by Landlord to
restore the Premises. If Landlord's good faith estimate of the time required to
restore the Premises exceeds 270 days from the date of such fire or casualty,
then Tenant shall have the right, exercisable by written notice to Landlord
within 15 days after delivery of Landlord's good faith estimate, to terminate
this Lease as of the date of such fire or other casualty. Notwithstanding the
foregoing, Tenant shall have no right to terminate this Lease if the fire or
other casualty was caused, in whole or in part, by the negligence or intentional
misconduct of Tenant or Tenant's agents, employees, contractors, invitees,
subtenants or assigns.

     13. CONDEMNATION. If the Premises or the Building is rendered untenantable
by reason of a condemnation (or by a deed given in lieu thereof), then either
party may terminate this Lease by giving written notice of termination to the
other party within 30 days after such condemnation, in which event this Lease
shall terminate effective as of the date which is the day immediately preceding
the date of such condemnation. If this Lease so terminates, Rent shall be paid
through and apportioned as of such termination date. If such condemnation does
not render the Premises or the Building untenantable, this Lease shall continue
in effect and Landlord shall promptly restore the portion not condemned to the
extent reasonably possible to the condition existing prior to the condemnation.
In such event, however, Landlord shall not be required to expend an amount in
excess of the proceeds received by Landlord from the condemning authority.
Landlord reserves all rights to compensation for any condemnation. Tenant hereby
assigns to Landlord any right Tenant may have to such compensation, and Tenant
shall make no claim against Landlord or the condemning authority for
compensation for termination of Tenant's leasehold interest under this Lease or
interference with Tenant's business.

     14. ASSIGNMENT AND SUBLETTING.

     A.  Landlord's Consent. Tenant shall not, without the prior written consent
         ------------------
of Landlord (which consent, with respect to a proposed assignment or sublease,
shall not be unreasonably withheld as provided in Section 14.B): (i) assign,
convey, mortgage or otherwise transfer this Lease or any interest hereunder, or
sublease the Premises, or any part thereof, whether voluntarily or by operation
of law; or (ii) permit the use of the Premises by any person

                                       14

<PAGE>

other than Tenant and its employees. Any such transfer, sublease or use
described in the preceding sentence (a "Transfer") occurring without the prior
written consent of Landlord shall be void and of no effect. Landlord's consent
to any Transfer shall not constitute a waiver of Landlord's right to withhold
its consent to any future Transfer. Landlord's consent to any Transfer or
acceptance of rent from any party other than Tenant shall not release Tenant
from any covenant or obligation under this Lease. Landlord may require as a
condition to its consent to any assignment of this Lease that the assignee
execute an instrument in which such assignee assumes the obligations of Tenant
hereunder. For the purposes of this paragraph, the transfer (whether direct or
indirect) of all or a majority of the capital stock in a corporate Tenant (other
than the shares of the capital stock of a corporate Tenant whose stock is
publicly traded) or the merger, consolidation or reorganization of such Tenant
and the transfer of all or any general partnership interest in any partnership
Tenant shall be considered a Transfer. If Tenant is a general or limited
partnership (or is comprised of two or more persons or entities), the change or
conversion of Tenant to (i) a limited liability company, (ii) a limited
liability partnership or (iii) any other entity which possesses the
characteristics of limited liability shall be prohibited unless the prior
written consent of Landlord is obtained, which consent may be withheld in
Landlord's sole discretion. Any such change or conversion without Landlord's
consent shall not release the individuals or entities comprising Tenant from
personal liability hereunder. Notwithstanding anything contained in this Section
14A to the contrary, provided Tenant is not then Default under this Lease,
Tenant shall have the right to assign this Lease or sublease the Premises, or
any part thereof, to an "Affiliate" (as defined below) without the prior written
consent of Landlord (and without Landlord having the right to receive any share
of the excess consideration or to recapture the applicable part of the Premises,
as otherwise provided in Sections 14.B and 14.C, respectively), but only upon at
least 10 days prior written notice to Landlord and subject to all of the other
provisions of this Lease, specifically including, without limitation, the
continuation of liability of Tenant under this Lease. Upon an assignment of this
Lease to an Affiliate, the Affiliate shall assume the obligations of the tenant
under this Lease from and after the effective date of such assignment pursuant
to a written assumption agreement executed and delivered to Landlord prior to
the effective date of such assignment. "Affiliate" shall mean any corporation or
other entity controlling, controlled by or under the common control with Tenant
or the surviving entity formed as a result of a merger or consolidation with
Tenant. The word "control", as used herein, shall mean the power to direct or
cause the direction of the management and policies of the controlled entity
through ownership of more than 50% of the voting securities in such controlled
entity. Nothing contained in this Section 14A shall permit an assignment of this
Lease or the subleasing of the Premises to any Affiliate that is disreputable,
non-creditworthy or otherwise not in keeping with the nature or class of tenants
in the Building, as reasonably determined by Landlord. Notwithstanding anything
contained in this Section 14A to the contrary, provided Tenant is not then
Default under this Lease, Tenant shall have the right to assign this Lease or
sublease the Premises, or any part thereof, to an "Affiliate" (as defined below)
without the prior written consent of Landlord, but only upon at least 10 days
prior written notice to Landlord and subject to all of the other provisions of
this Lease, specifically including, without limitation, the continuation of
liability of Tenant under this Lease. Upon an assignment of this Lease to an
Affiliate, the Affiliate shall assume the obligations of the tenant under this

                                       15

<PAGE>

Lease from and after the effective date of such assignment pursuant to a written
assumption agreement executed and delivered to Landlord prior to the effective
date of such assignment. "Affiliate" shall mean any corporation or other entity
controlling, controlled by or under the common control with Tenant or the
surviving entity formed as a result of a merger or consolidation with Tenant.
The word "control", as used herein, shall mean the power to direct or cause the
direction of the management and policies of the controlled entity through
ownership of more than 50% of the voting securities in such controlled entity.
Nothing contained in this Section 14A shall permit an assignment of this Lease
or the subleasing of the Premises to any Affiliate that is disreputable,
non-creditworthy or otherwise not in keeping with the nature or class of tenants
in the Building, as reasonably determined by Landlord.

     B. Standards for Consent. If Tenant desires the consent of Landlord to a
        ---------------------
Transfer, Tenant shall submit to Landlord, at least 30 days prior to the
proposed effective date of the Transfer, a written notice which includes such
information as Landlord may require about the proposed Transfer and the
transferee. If Landlord does not terminate this Lease, in whole or in part,
pursuant to Section 14C, Landlord shall not unreasonably withhold its consent to
any assignment or sublease. Landlord shall not be deemed to have unreasonably
withheld its consent if, in the judgment of Landlord: (i) the transferee is of a
character or engaged in a business which is not in keeping with the standards or
criteria used by Landlord in leasing the Building; (ii) the financial condition
of the transferee is such that it may not be able to perform its obligations in
connection with this Lease; (iii) the purpose for which the transferee intends
to use the Premises or portion thereof is in violation of the terms of this
Lease or the lease of any other tenant in the Building; (iv) the transferee is a
tenant of the Building (unless Landlord does not then itself have suitable space
available for leasing to the proposed transferee); or (v) any other bases which
Landlord reasonably deems appropriate. If Landlord consents to any Transfer,
Tenant shall pay to Landlord one-half of all rent and other consideration
received by Tenant in excess of the Rent paid by Tenant to Landlord hereunder
for the portion of the Premises so transferred. Such rent shall be paid as and
when received by Tenant. In addition, Tenant shall pay to Landlord any
reasonable attorneys' fees and expenses incurred by Landlord in connection with
any proposed Transfer, whether or not Landlord consents to such Transfer (which
shall not exceed $500, provided the Transfer is a typical sublease or assignment
transaction). If Landlord wrongfully withholds its consent to any Transfer,
Tenant's sole and exclusive remedy therefor, shall be to seek specific
performance of Landlord's obligation to consent to such Transfer.

     C. Recapture. If Tenant proposes to (i) assign this Lease or sublet more
        ---------
than 33% of the Premises, (ii) sublet any part of the Premises for more than
five years or (iii) extend or renew any existing sublease of any part of the
Premises or sublet any part of the Premises that has previously been sublet such
that the applicable part of the Premises will have been sublet (by one or more
parties) for more than five years, then Landlord shall have the right to
terminate this Lease as to that portion of the Premises covered by the Transfer.
Landlord may exercise such right to terminate by giving notice to Tenant at any
time within 30 days after the date on which Tenant has furnished to Landlord all
of the items required under Section 14B above. If Landlord exercises such right
to terminate, Landlord shall be entitled to recover possession of, and Tenant

                                       16

<PAGE>

shall surrender such portion of, the Premises (with appropriate demising
partitions erected at the expense of Tenant) on the later of (i) the effective
date of the proposed Transfer, or (ii) 60 days after the date of Landlord's
notice of termination. In the event Landlord exercises such right to terminate,
Landlord shall have the right to enter into a lease with the proposed transferee
without incurring any liability to Tenant on account thereof.

     15. SURRENDER. Upon termination of the Term or Tenant's right to possession
of the Premises, Tenant shall return the Premises to Landlord in good order and
condition, ordinary wear and damage by fire or other casualty excepted. If
Landlord requires Tenant to remove any alterations pursuant to Section 9, then
such removal shall be done in a good and workmanlike manner; and upon such
removal Tenant shall restore the Premises to its condition prior to the
installation of such alterations. If Tenant does not remove such alterations
after request to do so by Landlord, Landlord may remove the same and restore the
Premises; and Tenant shall pay the reasonable cost of such removal and
restoration to Landlord upon demand. Tenant shall also remove its furniture,
equipment, trade fixtures and all other items of personal property from the
Premises prior to the termination of the Term or Tenant's right to possession of
the Premises. If Tenant does not remove such items, Tenant shall be conclusively
presumed to have conveyed the same to Landlord without further payment or credit
by Landlord to Tenant; or at Landlord's sole option such items shall be deemed
abandoned, in which event Landlord may cause such items to be removed and
disposed of at Tenant's expense, without notice to Tenant and without obligation
to compensate Tenant.

     16. DEFAULTS AND REMEDIES.

     A.  Default. The occurrence of any of the following shall constitute a
         -------
default (a "Default") by Tenant under this Lease: (i) Tenant fails to pay any
Rent when due (and, only with respect to the first two of such defaults within
any 12 month period, such default shall continue for five days after written
notice to Tenant); (ii) Tenant fails to perform any other provision of this
Lease and such failure is not cured within 30 days (or immediately if the
failure involves a hazardous condition) after notice from Landlord; (iii) the
leasehold interest of Tenant is levied upon or attached under process of law;
(iv) Tenant or any guarantor of this Lease dies or dissolves; or (v) any
voluntary or involuntary proceedings are filed by or against Tenant or any
guarantor of this Lease under any bankruptcy, insolvency or similar laws and, in
the case of any involuntary proceedings, are not dismissed within 30 days after
filing.

     B.  Right of Re-Entry. Upon the occurrence of a Default, Landlord may elect
         -----------------
to terminate this Lease, or, without terminating this Lease, terminate Tenant's
right to possession of the Premises. Upon any such termination, Tenant shall
immediately surrender and vacate the Premises and deliver possession thereof to
Landlord. Tenant grants to Landlord the right to enter and repossess the
Premises and to expel Tenant and any others who may be occupying the Premises
and to remove any and all property therefrom, without being deemed in any manner
guilty of trespass and without relinquishing Landlord's rights to Rent or any
other right given to Landlord hereunder or by operation of law.

                                       17

<PAGE>

     C. Reletting. If Landlord terminates Tenant's right to possession of the
        ---------
Premises without terminating this Lease, Landlord may relet the Premises or any
part thereof. In such case, Landlord shall use reasonable efforts to relet the
Premises on such terms as Landlord shall reasonably deem appropriate; provided,
however, Landlord may first lease Landlord's other available space and shall not
be required to accept any tenant offered by Tenant or to observe any
instructions given by Tenant about such reletting. Tenant shall reimburse
Landlord for the reasonable costs and expenses of reletting the Premises
including, but not limited to, all brokerage, advertising, legal, alteration and
other expenses incurred to secure a new tenant for the Premises. In addition, if
the consideration collected by Landlord upon any such reletting, after payment
of the expenses of reletting the Premises which have not been reimbursed by
Tenant, is insufficient to pay monthly the full amount of the Rent, Tenant shall
pay to Landlord the amount of each monthly deficiency as it becomes due. If such
consideration is greater than the amount necessary to pay the full amount of the
Rent, the full amount of such excess shall be retained by Landlord and shall in
no event be payable to Tenant.

     D. Termination of Lease. If Landlord terminates this Lease, Landlord may
        --------------------
recover from Tenant and Tenant shall pay to Landlord, on demand, as and for
liquidated and final damages, an accelerated lump sum amount equal to the amount
by which Landlord's estimate of the aggregate amount of Rent owing from the date
of such termination through the Expiration Date plus Landlord's estimate of the
aggregate expenses of reletting the Premises, exceeds Landlord's estimate of the
fair rental value of the Premises for the same period (after deducting from such
fair rental value the time needed to relet the Premises and the amount of
concessions which would normally be given to a new tenant), both discounted to
present value at the rate of 5% per annum.

     E. Other Remedies. Landlord may but shall not be obligated to perform any
        --------------
obligation of Tenant under this Lease; and, if Landlord so elects, all costs and
expenses paid by Landlord in performing such obligation, together with interest
at the Default Rate, shall be reimbursed by Tenant to Landlord on demand. Any
and all remedies set forth in this Lease: (i) shall be in addition to any and
all other remedies Landlord may have at law or in equity, (ii) shall be
cumulative, and (iii) may be pursued successively or concurrently as Landlord
may elect. The exercise of any remedy by Landlord shall not be deemed an
election of remedies or preclude Landlord from exercising any other remedies in
the future.

     F. Bankruptcy. If Tenant becomes bankrupt, the bankruptcy trustee shall not
        ----------
have the right to assume or assign this Lease unless the trustee complies with
all requirements of the United States Bankruptcy Code; and Landlord expressly
reserves all of its rights, claims, and remedies thereunder.

     G. Waiver of Trial by Jury. Landlord and Tenant waive trial by jury in the
        -----------------------
event of any action, proceeding or counterclaim brought by either Landlord or
Tenant against the other in connection with this Lease.

                                       18

<PAGE>

     H.  Venue. If either Landlord or Tenant desires to bring an action against
         -----
the other in connection with this Lease, such action shall be brought in the
federal or state courts located in Chicago, Illinois. Landlord and Tenant
consent to the jurisdiction of such courts and waive any right to have such
action transferred from such courts on the grounds of improper venue or
inconvenient forum.

     17. HOLDING OVER. If Tenant retains possession of the Premises after the
expiration or termination of the Term or Tenant's right to possession of the
Premises, Tenant shall pay Rent during such holding over at double the rate in
effect immediately preceding such holding over computed on a monthly basis for
each month or partial month that Tenant remains in possession (provided that
except for a termination pursuant to Section 27, during the first 90 days of
such holding over, the Rent shall instead be 150% of the rate in effect
immediately preceding such holding over). Tenant shall also pay, indemnify and
defend Landlord from and against all claims and damages, consequential as well
as direct, sustained by reason of Tenant's holding over. The provisions of this
Section do not waive Landlord's right of re-entry or right to regain possession
by actions at law or in equity or any other rights hereunder, and any receipt of
payment by Landlord shall not be deemed a consent by Landlord to Tenant's
remaining in possession or be construed as creating or renewing any lease or
right of tenancy between Landlord and Tenant.

     18. SECURITY DEPOSIT.

     A.  Security Deposit. At the time of signing this Lease, Tenant shall
         ----------------
deposit with Landlord an unconditional, irrevocable letter of credit in
Landlord's favor in the amount set forth in Item 5 of the Schedule (the "LOC"),
which LOC shall be freely assignable by Landlord, issued by a "Qualified Issuer"
approved by Landlord, drawable in Chicago, Illinois and in the form of the
letter of credit attached hereto as Exhibit G, which deposit is to be retained
by Landlord as security for the faithful performance and observance by Tenant of
the covenants, agreements and conditions of this Lease. The LOC and any proceeds
drawn thereunder or any other cash or security deposited by Tenant with Landlord
under this Lease are hereinafter collectively called the "Security Deposit." If
and to the extent permitted by applicable law, (a) Tenant shall not be entitled
to any interest on the Security Deposit, (b) Landlord shall not be obligated to
hold the Security Deposit in trust or in a separate account, and (c) Landlord
shall have the right to commingle the Security Deposit with its other funds.
Landlord may use, apply or retain the whole or any part of the Security Deposit
to the extent required for the payment of any Rent payable hereunder as to which
Tenant is in Default or to the extent required for the reimbursement to Landlord
of any sum which Landlord may expend or may be required to expend by reason of
any Default. Upon notice by Landlord of Landlord's application of all or any
portion of the Security Deposit as aforesaid, Tenant shall replenish the
Security Deposit in full by promptly paying to Landlord in cash the amount so
applied. If Tenant shall fully and faithfully comply with all of the covenants,
agreements and conditions of this Lease, the Security Deposit (or balance
thereof) shall be returned to Tenant after the date fixed as the expiration of
the Term and surrender of the Premises to Landlord. If the Building is sold to a
bona fide purchaser,

                                       19

<PAGE>

Landlord shall have the right to transfer the Security Deposit to such
purchaser, by which transfer Landlord shall be released from all liability for
the return thereof, and Tenant shall look solely to the new landlord for the
return thereof. Landlord shall promptly respond to Tenant's request at the time
of such transfer concerning the status of the Security Deposit.

     B.  Replacement Letter of Credit. Tenant shall deposit with Landlord not
         ----------------------------
later than 60 days prior to the expiration date of the original LOC deposited by
Tenant hereunder (and not later than 60 days prior to the expiration date of
each replacement LOC deposited by Tenant hereunder), a replacement LOC in form,
content and amount identical to the original LOC and issued by a "Qualified
Issuer" approved by Landlord. If Tenant fails to timely deposit any such
replacement LOC with Landlord and such failure continues for 10 days after
written notice to Tenant (and which failure is not subject to any notice and
cure period under Section 16), then Landlord may draw the entire proceeds of the
LOC then on deposit with Landlord and the proceeds so drawn shall constitute and
comprise part of the Security Deposit and may be held, transferred and applied
by Landlord in accordance with the provisions of this Section 18.

     C.  Qualified Issuer. For purposes of this Lease, "Qualified Issuer" means
         ----------------
any commercial bank which, at the particular time its status as a Qualified
Issuer is relevant hereunder, has total assets of at least U.S. $500 million and
has an overall financial rating of "B" or better from the Lace Company (and the
Lace Company has not given notice that such bank is on its "watch list" or that
its rating is under reconsideration or reevaluation). If at any time after
issuance of the LOC (or any replacement LOC), the issuing bank fails to be a
Qualified Issuer or is not otherwise financially sound in Landlord's sole
judgment, the LOC or replacement LOC, as the case may be, upon written notice
from Landlord to Tenant, shall be immediately reissued by a Qualified Issuer
approved by Landlord, which reissuance shall be in accordance with the
provisions of this Lease.

     19. [Intentionally Deleted).

     20. ESTOPPEL CERTIFICATES. Tenant agrees that, from time to time upon not
less than 15 days' prior request by Landlord, Tenant shall execute and deliver
to Landlord a written certificate certifying: (i) that this Lease is unmodified
and in full force and effect (or if there have been modifications, a description
of such modifications and that this Lease as modified is in full force and
effect); (ii) the dates to which Rent has been paid; (iii) that Tenant is in
possession of the Premises, if that is the case; (iv) that Landlord is not in
default under this Lease, or, if Tenant believes Landlord is in default, the
nature thereof in detail; (v) that Tenant has no off-sets or defenses to the
performance of its obligations under this Lease (or if Tenant believes there are
any off-sets or defenses, a full and complete explanation thereof); and (vi)
such additional matters as may be requested by Landlord, it being agreed that
such certificate may be relied upon by any prospective purchaser, mortgagee or
other person having or acquiring an interest in the Building. If Tenant fails to
execute and deliver any such certificate within 15 days after request, such
failure shall constitute a Default hereunder (without the necessity for the
delivery of any additional notice as otherwise required pursuant to Section 16).

                                       20

<PAGE>

     21. SUBORDINATION. This Lease is and shall be expressly subject and
subordinate at all times to (a) any present or future ground, underlying or
operating lease of the Building, and all amendments, renewals and modifications
to any such lease, and (b) the lien of any present or future mortgage or deed of
trust encumbering fee title to the Building and/or the leasehold estate under
any such lease. If any such mortgage or deed of trust be foreclosed, or if any
such lease be terminated, upon request of the mortgagee, beneficiary or lessor,
as the case may be, Tenant will attorn to the purchaser at the foreclosure sale
or to the lessor under such lease, as the case may be. The foregoing provisions
are declared to be self-operative and no further instruments shall be required
to effect such subordination and/or attornment; provided, however, that Tenant
agrees upon request by any such mortgagee, beneficiary, lessor or purchaser at
foreclosure, as the case may be, to execute such subordination and/or attornment
instruments as may be required by such person to confirm such subordination
and/or attornment on the form customarily used by such party or, at such party's
election, on the form attached hereto as Exhibit E. Notwithstanding the
foregoing to the contrary, any such mortgagee, beneficiary or lessor may elect
to give the rights and interests of Tenant under this Lease (excluding rights in
and to insurance proceeds and condemnation awards) priority over the lien of its
mortgage or deed of trust or the estate of its lease, as the case may be. In the
event of such election and upon the mortgagee, beneficiary or lessor notifying
Tenant of such election, the rights and interests of Tenant shall be deemed
superior to and to have priority over the lien of said mortgage or deed of trust
or the estate of such lease, as the case may be, whether this Lease is dated
prior to or subsequent to the date of such mortgage, deed of trust or lease. In
such event, Tenant shall execute and deliver whatever instruments may be
required by such mortgagee, beneficiary or lessor to confirm such superiority on
the form customarily used by such party. If Tenant fails to execute any
instrument required to be executed by Tenant under this Section 21 within 15
days after request, Tenant irrevocably appoints Landlord as its
attorney-in-fact, in Tenant's name, to execute such instrument. Notwithstanding
anything in this Section 21 to the contrary, Landlord agrees to use reasonable
efforts to procure a non-disturbance agreement from any present and future first
mortgagee or ground lessor of the Building on such mortgagee's or ground
lessor's customary form. Tenant understands that Landlord shall not be
responsible to expend any funds in order to procure such non-disturbance
agreement and Tenant's obligations under this Lease shall not be conditioned
upon Landlord's obtaining such non-disturbance agreement and Tenant's sole and
exclusive remedy for Landlord's failure to use such efforts shall be a claim for
actual damages directly caused as a result of such breach (excluding any
indirect, consequential or punitive damages), which damages shall not exceed the
amount of Rent payable under this Lease from and after the date of said
Landlord's default, and in no event shall Tenant be entitled to terminate this
Lease or to any abatement of Rent as a result of such breach.

     22. QUIET ENJOYMENT. As long as no Default exists, Tenant shall peacefully
and quietly have and enjoy the Premises for the Term, free from interference by
Landlord, subject, however, to the provisions of this Lease. The loss or
reduction of Tenant's light, air or view will not be deemed a disturbance of
Tenant's occupancy of the Premises nor will it affect Tenant's obligations under
this Lease or create any liability of Landlord to Tenant.

                                       21

<PAGE>

     23. BROKER. Tenant represents to Landlord that Tenant has dealt only with
the broker(s) set forth in Item 9 of the Schedule (the "Broker") in connection
with this Lease and that, insofar as Tenant knows, no other broker negotiated
this Lease or is entitled to any commission in connection herewith. Tenant
agrees to indemnify, defend and hold Landlord, its property manager and their
respective employees harmless from and against all claims, demands, actions,
liabilities, damages, costs and expenses (including, attorneys' fees) arising
from either (i) a claim for a fee or commission made by any broker, other than
the Broker, claiming to have acted by or on behalf of Tenant in connection with
this Lease, or (ii) a claim of, or right to, lien under the statutes of Illinois
relating to real estate broker liens with respect to any such broker retained by
Tenant. Landlord agrees to pay the Broker a commission in accordance with the
separate agreement between Landlord and the Brokers described in Item 10 of the
Schedule.

     24. NOTICES. Except as otherwise expressly provided herein, all notices and
demands to be given by one party to the other party under this Lease shall be
given in writing, mailed or delivered to Landlord at the address set forth above
and to Tenant at the following addresses:

             Stacy Cannon, Esq.
             Vice President and General Counsel
             Global Knowledge Network, Inc.
             One Van De Graff Drive
             Burlington, MA 01803

             With a copy to:

             Mr. Rick Gregory
             Global Knowledge Network, Inc.
             One Van De Graff Drive
             Burlington, MA 01803

or at such other address as either party may hereafter designate. Notices shall
be delivered by hand or by United States certified or registered mail, postage
prepaid, return receipt requested, or by a nationally recognized overnight air
courier service. Notices shall be considered to have been given upon the earlier
to occur of actual receipt, two business days after posting in the United States
mail or the first business day after delivery to the courier service.

     25. MISCELLANEOUS.

     A.  Successors and Assigns. Subject to Section 14 of this Lease, each
         ----------------------
provision of this Lease shall extend to, bind and inure to the benefit of
Landlord and Tenant and their respective legal representatives, successors and
assigns; and all references herein to Landlord and Tenant shall be deemed to
include all such parties.

                                       22

<PAGE>

     B. Entire Agreement. This Lease, and the riders and exhibits, if any,
        ----------------
attached hereto which are hereby made a part of this Lease, represent the
complete agreement between Landlord and Tenant; and Landlord has made no
representations or warranties except as expressly set forth in this Lease. No
modification or amendment of or waiver under this Lease shall be binding upon
Landlord or Tenant unless in writing signed by Landlord and Tenant.

     C. Time of Essence. Time is of the essence of this Lease and each and all
        ---------------
of its provisions.

     D. Execution and Delivery. Submission of this instrument for examination or
        ----------------------
signature by Tenant does not constitute a reservation of space or an option for
lease, and it is not effective until execution and delivery by both Landlord and
Tenant. Execution and delivery of this Lease by Tenant to Landlord shall
constitute an irrevocable offer by Tenant to lease the Premises on the terms and
conditions set forth herein, which offer may not be revoked for 15 days after
such delivery.

     E. Severability. The invalidity or unenforceability of any provision of
        ------------
this Lease shall not affect or impair any other provisions.

     F. Governing Law. This Lease shall be governed by and construed in
        -------------
accordance with the laws of the State in which the Premises are located.

     G. Attorneys' Fees. Tenant shall pay to Landlord all costs and expenses,
        ---------------
including reasonable attorneys fees, incurred by Landlord in connection with any
action between Landlord and Tenant arising out of this Lease or incurred by
Landlord as a result of any litigation to which Landlord becomes a party as a
result of this Lease.

     H. Delay in Possession. In no event shall Landlord be liable to Tenant if
        -------------------
Landlord is unable to deliver possession of the Premises to Tenant on the
Commencement Date for causes outside Landlord's reasonable control.

     I. Joint and Several Liability. If Tenant is comprised of more than one
        ---------------------------
party, each such party shall be jointly and severally liable for Tenant's
obligations under this Lease.

     J. Force Majeure. Landlord shall not be in default hereunder and Tenant
        -------------
shall not be excused from performing any of its obligations hereunder if
Landlord is prevented from performing any of its obligations hereunder due to
any accident, breakage, strike, shortage of materials, acts of God or other
causes beyond Landlord's reasonable control.

     K. Captions. The headings and titles in this Lease are for convenience only
        --------
and shall have no effect upon the construction or interpretation of this Lease.

                                       23

<PAGE>

     L.  No Waiver. No receipt of money by Landlord from Tenant after
         ---------
termination of this Lease or after the service of any notice or after the
commencing of any suit or after final judgment for possession of the Premises
shall renew, reinstate, continue or extend the Term or affect any such notice or
suit. No waiver of any default of Tenant shall be implied from any omission by
Landlord to take any action on account of such default if such default persists
or be repeated, and no express waiver shall affect any default other than the
default specified in the express waiver and then only for the time and to the
extent therein stated.

     M.  No Recording. Tenant shall not record this Lease or a memorandum of
         ------------
this Lease in any official records.

     N.  Limitation of Liability. Any liability of Landlord under this Lease
         -----------------------
shall be limited solely to its equity interest in the Building, and in no event
shall any personal liability be asserted against Landlord in connection with
this Lease nor shall any recourse be had to any other property or assets of
Landlord.

     26. PARKING. Landlord agrees to furnish to Tenant, at no additional charge,
88 unreserved, unassigned parking spaces in the Building's parking lot (which is
four parking spaces per 1,000 rentable square feet of the Premises), for so long
as this Lease is in full force and effect and Tenant is not in Default under
this Lease. If the rentable area of the Premises is reduced below the amount
stated in Item 1B of the Schedule for any reason, then the number of Tenant's
parking spaces shall be reduced proportionately. Tenant shall not allow its
employees or invitees to use more parking spaces than the number furnished to
Tenant pursuant to this Section 26. If Tenant needs additional parking for its
employees and invitees at the Premises, Tenant must make arrangements for such
parking outside the Windy Point of Schaumburg project. Landlord may designate
parking spaces in the parking lots as "reserved" and Tenant shall not allow its
employees or invitees to use such reserved spaces. Tenant's use of all parking
spaces is subject to all applicable codes, ordinances, laws, regulations and
statutes and reasonable rules and regulations promulgated from time to time by
Landlord, as well as the restrictions set forth in the recorded Declaration of
Covenants, Conditions, Restrictions, Reciprocal Rights and Easements encumbering
the project.

     27. LANDLORD'S TERMINATION OPTION.

     A.  Termination Option. Landlord shall have an option (the "Termination
         ------------------
Option") to terminate this Lease effective as of December 31, 2005 (the
"Termination Date"). The Termination Option is granted subject to the following
terms and conditions:

         (i)  Landlord gives Tenant written notice of Landlord's election to
     exercise the Termination Option not later than April 30, 2005; and

         (ii) Landlord pays to Tenant, within 30 days after Tenant vacates the
     Premises (provided Tenant is not then in Default), a cash lease termination
     fee (the "Fee") in an

                                       24

<PAGE>

     amount equal to the product of (x) $10.00 multiplied by (y) the rentable
     area of the Premises (in rentable square feet) as of the Termination Date.

     B.   Terms. If Landlord exercises the Termination Option (1) all Rent
          -----
payable under this Lease shall be paid through and apportioned as of the
Termination Date, (2) neither party shall have any rights, estates, liabilities
or obligations under this Lease for the period accruing after the Termination
Date, except those which, by the provisions of this Lease, are intended to
survive the expiration or termination of the Term of this Lease, and (3)
Landlord and Tenant shall enter into a written agreement reflecting the
termination of this Lease upon the terms provided for herein, which agreement
shall be executed within 30 days after Landlord exercises the Termination
Option.

     28.  RENEWAL OPTION.

     A.   Renewal Option. Tenant shall have an option (the "Renewal Option") to
          --------------
renew the Term with respect to all (but not less than all) of the Premises
demised under or pursuant to this Lease as of the expiration date of the initial
Term, for one additional term (the "Renewal Term") of five years, upon the
following terms and conditions:

          (i)   Tenant gives Landlord written notice of Tenant's election to
     exercise the Renewal Option not later than nine months prior to the
     expiration date of the initial Term;

          (ii)  Tenant submits current financial statements of Tenant to
     Landlord concurrently with Tenant's notice exercising the Renewal Option
     and such financial statements are reasonably satisfactory to Landlord; and

          (iii) Tenant is not in Default under this Lease, either on the date
     Tenant exercises the Renewal Option or on the expiration date of the
     initial Term, and this Lease is in full force and effect on the date on
     which Tenant exercises the Renewal Option and on the proposed commencement
     date of the Renewal Term.

     B.   Terms. If Tenant timely and properly exercises the Renewal Option:
          -----

          (i)   The Rent payable for the Renewal Term shall be equal to the
     "market rate of rent" that Landlord reasonably anticipates will be in
     effect at the commencement of the Renewal Term. Upon Tenant's written
     request given to Landlord not later than 11 months prior to the expiration
     date of the initial Term, Landlord shall give Tenant written notice setting
     forth the market rate of rent not later than 10 months prior to the
     expiration date of the initial Term (if Tenant fails to timely request such
     market rate in advance, then Landlord shall give Tenant written notice
     setting forth the market rate of rent prior to the commencement date of the
     Renewal Term). "Market rate of rent" shall mean the greater of (i) the
     then-escalated rate of Rent for the Premises as of the last year of the
     initial Term (the "Existing Rental Rate") and (ii) the prevailing market
     rental rate that a willing,

                                       25

<PAGE>

     comparable property would accept, in an arm's length transaction, as of the
     commencement of the Renewal Term, for comparable premises, taking into
     account the annual rental rates per rentable square foot, the standard of
     measurement by which the rentable square footage is measured, the type of
     escalation clause, the extent of the tenant's liability under the lease,
     abatement provisions reflecting free rent and/or no rent during the period
     of construction or subsequent to the commencement date as to the space in
     question, the brokerage commission which would be payable by the landlord
     in similar transactions, the length of the lease term, improvement costs
     borne by the landlord, allowances and other concessions to the tenant, and
     the size and location of the premises being leased. The Base Rent payable
     during the Renewal Term shall be subject to adjustment during the Renewal
     Term as provided in Landlord's written notice setting forth the market rate
     of rent (or, if the market rate of rent is the Existing Rental Rate, the
     Base Rent shall increase by 3% per annum during each year of the Renewal
     Term, commencing with the first day of the second year of the Renewal
     Term). There shall be no abatement of Base Rent or Adjustment Rent for the
     Premises during the Renewal Term, except as may be specifically provided in
     Landlord's written notice setting forth the market rate of rent.

          (ii)  Tenant shall have no further options to renew the Term of this
     Lease beyond the expiration date of the Renewal Term.

          (iii) Landlord shall not be obligated to perform any leasehold
     improvement work in the Premises or give Tenant any allowance for any such
     work or any other purposes during or for the Renewal Term, except as to any
     allowance which may be specifically provided in Landlord's written notice
     setting forth the market rate of rent.

          (iv)  Except for the rate of Rent and except as otherwise provided
     herein, all of the terms and provisions of this Lease shall remain the same
     and in full force and effect during the Renewal Term.

     C.   Amendment. If Tenant exercises the Renewal Option, Landlord and Tenant
          ---------
shall execute and deliver an amendment to this Lease reflecting the lease of the
Premises by Landlord to Tenant for the Renewal Term on the terms provided above,
which amendment shall be executed and delivered within 30 days after Tenant
exercises the Renewal Option.

     D.   Termination. The Renewal Option shall automatically terminate and
          -----------
become null and void upon the earlier to occur of (1) the expiration or
termination of this Lease, (2) the termination of Tenant's right to possession
of all or any part of the Premises, (3) the assignment of this Lease by Tenant,
in whole or in part (other than to an Affiliate in accordance with Section
14.A), (4) the sublease by Tenant of all or any part of the Premises (other than
to an Affiliate in accordance with Section 14.A), (5) the recapture by Landlord
of all or any part of the Premises

                                       26

<PAGE>

pursuant to Section 14C hereof, or (6) the failure of Tenant to timely or
properly exercise the Renewal Option.

     IN WITNESS WHEREOF, Landlord and Tenant have executed this Lease as of the
day and year first above written.

LANDLORD:                                       TENANT:
--------                                        ------

WINDY POINT OF SCHAUMBURG                       GLOBAL KNOWLEDGE NETWORK,
L.L.C., a Delaware limited                      INC., a Delaware corporation
liability company

By:  FRC WINDY POINT L.L.C., an
     Illinois limited liability                 By: /s/ Bruce J. Ryan
                                                    ---------------------------
     company, its managing member               Title: Vice President & CFO
                                                       ------------------------

     By: /s/ Steven D. Fifield
         ---------------------------
     Title:_________________________

                                       27

<PAGE>

                           (Landlord's Acknowledgment)

STATE OF ILLINOIS  )
                   ) SS.
COUNTY OF COOK     )

     On this 10th day of January, 2000, before me appeared Steven D. Fifield, to
me personally known, who being by me duly sworn, did say that he/she is the
Managing Member of FRC WINDY POINT, L.L.C., an Illinois limited liability
company ("Manager") and managing member of WINDY POINT OF SCHAUMBURG L.L.C., a
Delaware limited liability company ("Owner"), the company that executed the
within and foregoing instrument and that said instrument was signed and sealed
in behalf of said Manager and Owner, and said Steven D. Fifield acknowledged
said instrument to be the free act and deed of said Manager and Owner.

[SEAL]

                                                   /s/ Kathryn A. Hutcheson
                                                  ------------------------------
                                                            NOTARY PUBLIC

                                       28

<PAGE>

                        (Tenant Corporate Acknowledgment)

STATE OF MASS        )
                     )  SS.
COUNTY OF MIDDLESEX  )

     On this 22 day of December, 1999, before me appeared Bruce J. Ryan, to me
personally known, who being by me duly sworn, did say that (he) is the VP & CFO
of GLOBAL KNOWLEDGE NETWORK, INC., a Delaware corporation, the corporation that
executed the within and foregoing instrument and that said instrument was
signed and sealed in behalf of said corporation by authority of its Board of
Directors, and that the seal affixed is the corporate seal of said corporation
and said Bruce J. Ryan acknowledged said instrument to be the free act and deed
of said corporation.

                                                    /s/ Karen K. Gemmato
                                                 ------------------------------
                                                           NOTARY PUBLIC

                                                 KAREN K. GEMMATO, Notary Public
                                                       My Commission Expires
                                                          June 18, 2005

<PAGE>

                                   EXHIBIT A

                                  [FLOOR PLAN]

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