Document:

EXHIBIT
      10.1.7

     

      July
        25,
        2007

    

    Camden
      Learning Corporation

    500
      East
      Pratt Street

    Suite
      1200

    Baltimore,
      MD 21202

    

    Morgan
      Joseph & Co. Inc.

    600
      Fifth
      Avenue, 19 th
      floor

    New
      York,
      NY 10020

    

    
      	 	
              Re:

            	
              Camden
                Learning Corporation (the “ Company ”)

            

    

    

    Gentlemen:

    

      The
        undersigned, in consideration of Morgan Joseph & Co. Inc. (“Morgan
        Joseph”)
        entering into a letter of intent (the “Letter
        of Intent”)
        to
        underwrite an initial public offering (the “IPO”)
        of the
        securities of the Company and embarking on, undertaking and continuing to
        participate in the IPO process, hereby agrees as follows (certain capitalized
        terms used herein are defined in paragraph XV hereof):

    

    I. 
      (1)   In the event the Company fails to consummate a Business Combination
      within 24 months from the effective date (the “Effective
      Date”)
      of the
      registration statement relating to the IPO (the “Termination
      Date”),
      the
      undersigned shall, in accordance with all applicable requirements of the
      Delaware General Corporation Law (the “DGCL”),
      (i)
      cause the Trustee to liquidate the Trust Account to the holders of the IPO
      Shares and (ii) take all reasonable actions within his power to cause the
      Company to liquidate as soon as reasonably practicable.

    

    (2)
        Except with respect to any of the IPO Shares acquired by the undersigned
      in connection with or following the IPO, the undersigned hereby (a) waives
      any
      and all right, title, interest or claim of any kind (a “Claim”)
      in or
      to all funds in the Trust Account and any remaining net assets of the Company
      upon liquidation of the Trust Account and dissolution of the Company, (b) waives
      any Claim the undersigned may have in the future as a result of, or arising
      out
      of, any contracts or agreements with the Company and (c) agrees the undersigned
      will not seek recourse against the Trust Account for any reason
      whatsoever.

    

    II. 
In
      order to minimize potential conflicts of interest which may arise from multiple
      affiliations, the undersigned agrees, in accordance with the Right of First
      Refusal Agreement, to present to the Company for its consideration, prior
      to presentation to any other person or entity, any suitable opportunity to
      acquire an operating business, until the earlier of (i) the consummation by
      the
      Company of a Business Combination, (ii) the dissolution of the Company or (iii)
      such time as the undersigned ceases to be a director of the Company, subject
      to
      any pre-existing fiduciary and contractual obligations the undersigned might
      have.

    

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

     

    III. 
      The undersigned acknowledges and agrees the Company will not consummate any
      Business Combination which involves a company which is affiliated with any
      of
      the Insiders unless the Company obtains an opinion from an independent
      investment banking firm which is a member of the National Association of
      Securities Dealers, Inc. and is reasonably acceptable to Morgan Joseph that
      the
      Business Combination is fair to the Company’s stockholders from a financial
      perspective.

    

    IV. 
      (1)   Neither the undersigned, any member of the family of the undersigned,
      nor any affiliate of the undersigned (“Affiliate”)
      will
      be entitled to receive, and no such person will accept, any compensation for
      services rendered to the Company by the Company prior to the consummation of
      a
      Business Combination.

    

    (2)
        The undersigned shall be entitled to reimbursement from the Company for
      his out-of-pocket expenses incurred in connection with seeking and consummating
      a Business Combination, only (a) from funds not held in the Trust Account or
      (b)
      upon the consummation of a Business Combination.

    

    V. 
      Neither the undersigned, any member of the family of the undersigned, nor any
      Affiliate will be entitled to receive or accept a finder’s fee or any other
      compensation in the event the undersigned, any member of the family of the
      undersigned or any Affiliate originates a Business Combination.

    

    VI. 
      The undersigned agrees that during his period of service as a director, he
      will
      not become associated with any other special purpose activity corporation that
      is involved or intends to become involved in the activities similar to those
      activities that the Company intends to pursue with respect to a Business
      Combination.

     

    

        VII.
          (1)
The
          undersigned agrees to be a director of the Company until the earlier of
          the
          consummation of a Business Combination or the dissolution of the Company.
          The
          undersigned agrees to not resign (or advise the Board that the undersigned
          declines to seek re-election to the Board of Directors) from his position
          as
          director of the Company as set forth in the Registration Statement without
          the
          prior consent of Morgan Joseph (such
          consent not to be unreasonably withheld)
          until
          the earlier of the consummation by the Company of a Business Combination,
          liquidation of the Trust Account, or the dissolution of the Company. The
          undersigned acknowledges the foregoing does not interfere with or limit
          in any
          way the right of the Company to terminate the undersigned’s employment at any
          time (subject to other contractual rights the undersigned may have) nor
          confer
          upon the undersigned any right to continue in the employ of
          Company.

    

     

    (2)
        The undersigned’s biographical information furnished to the Company and
      Morgan Joseph and included as part of the Registration Statement for the IPO
      is
      true and accurate in all respects, does not omit any material information with
      respect to the undersigned’s background and contains all of the information
      required to be disclosed pursuant to Item 401 of Regulation S-K, promulgated
      under the Securities Act of 1933, as amended (the “Securities
      Act”).
      The
      undersigned’s Questionnaire previously furnished to the Company and Morgan
      Joseph is true and accurate in all respects as of the date first written
      above.

    

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

     

    (3)
        The undersigned represents and warrants:

    

    (a)
        he is not subject to or a respondent in any legal action for, any
      injunction relating to, or any cease-and-desist order or order or stipulation
      to
      desist or refrain from any act or practice relating to the offering of
      securities in any jurisdiction;

    

    (b)
        he has never been convicted of or pleaded guilty to any crime (i)
      involving any fraud or (ii) relating to any financial transaction or handling
      of
      funds of another person, or (iii) pertaining to any dealings in any securities,
      and he is not currently a defendant in any such criminal proceeding;
      and

    

    (c)
        he has never been suspended or expelled from membership in any securities
      or commodities exchange or association or had a securities or commodities
      license or registration denied, suspended or revoked.

    

    VIII. 
      The undersigned has full right and power, without violating any agreement by
      which he is bound, to enter into this letter agreement and to serve as a
      director of the Company.

    

      IX. The
        undersigned hereby agrees not to propose, or vote in favor of, any amendment
        to
        the Company’s Certificate of Incorporation that requires the affirmative vote of
        at least 95% of the IPO Shares. This paragraph may not be modified or amended
        under any circumstances.

    

      X. 
        The undersigned authorizes any employer, financial institution, or consumer
        credit reporting agency to release to Morgan Joseph and its legal
        representatives or agents (including any investigative search firm retained
        by
        Morgan Joseph) any information they may have about the undersigned’s background
        and finances (“Information”).
        Neither Morgan Joseph nor its agents shall be violating the undersigned’s right
        of privacy in any manner in requesting and obtaining the Information and
        the
        undersigned hereby releases them from liability for any damage whatsoever
        in
        that connection.

    

      XI. 
In
        connection with the vote required to consummate a Business Combination, the
        undersigned agrees that he will vote all shares of common stock, par value
        $.0001 per share (the “Common
        Stock”)
        (i)
        owned by him (either directly or indirectly) prior to the IPO (the “Insider
        Shares”)
        in
        accordance with the majority of the votes cast by the holders of the IPO
        Shares
        and (ii) purchased by him in or following the IPO “for” a Business
        Combination

    

      XII. 
        The undersigned will escrow all of the Insider Shares beneficially owned
        by him,
        if any, for the period commencing on the Effective Date and ending on the
        first
        anniversary following a Business Combination, subject to the terms of a
        Securities Escrow Agreement which the Company will enter into with the
        undersigned and an escrow agent acceptable to the Company.

    

      XIII. 
        The undersigned hereby waives his right to exercise redemption rights with
        respect to any Insider Shares owned or to be owned by the undersigned, directly
        or indirectly, and agrees that he will not seek redemption with respect to
        such
        shares in connection with any vote to approve a Business
        Combination.

    

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

     

      XIV. 
        This letter agreement shall be governed by and construed and enforced in
        accordance with the laws of the State of New York, without giving effect
        to
        conflicts of law principles that would result in the application of the
        substantive laws of another jurisdiction. The undersigned hereby: (i) agrees
        that any action, proceeding or claim against him arising out of or relating in
        any way to this letter agreement (a “Proceeding”)
        shall
        be brought and enforced in the federal courts of the United States of America
        for the Southern District of New York, and irrevocably submits to the
        jurisdiction of such courts, which jurisdiction shall be exclusive, (ii)
        waives
        any objection to the exclusive jurisdiction of such courts and any objection
        that such courts represent an inconvenient forum and (iii) irrevocably agrees
        to
        appoint Ellenoff Grossman & Schole LLP as agent for the service of process
        in the State of New York to receive, for the undersigned and on his behalf,
        service of process in any Proceeding. If for any reason such agent is unable
        to
        act as such, the undersigned will promptly notify the Company and Morgan
        Joseph
        and appoint a substitute agent acceptable to each of the Company and Morgan
        Joseph within 30 days and nothing in this letter will affect the right of
        either
        party to serve process in any other manner permitted by law.

    

      XV. 
As
        used herein, (i) a “Business
        Combination”
shall
        mean a merger, capital stock exchange, asset acquisition or other similar
        business combination between the Company and one or more operating businesses
        in
        the education industry; (ii) “Insiders”
shall
        mean all officers, directors and stockholders of the Company immediately
        prior
        to the IPO; (iii) “IPO
        Shares”
shall
        mean the shares of Common Stock issued in the Company’s IPO; (iv) “Trust
        Account”
shall
        mean the trust account in which most of the proceeds to the Company of the
        IPO
        will be deposited and held for the benefit of the holders of the IPO shares,
        as
        described in greater detail in the prospectus relating to the IPO; and (vi)
        Right of First Refusal Agreement refers to such agreement executed by all
        the
        officers and directors in connection with the transactions completed hereby;
        and
        (v) “Trustee”
shall
        mean Continental Stock Transfer & Trust Company.

    

      XVI. 
        This letter agreement shall supersede any other letter agreement signed by
        the
        undersigned with respect to the subject matter hereof.  

    

    [Signature
      Page to Follow]

    

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

      
        	 	 	 	
                
                  
                    Very
                      truly yours,

                  

                

              
	 	 	 	 
	
              	 	 	
                
                  
                    
                      
                        
                          /s/
                            William
                            Jews   

                        

                      

                    

                  

                

              
	
              	 	 	
                

                
                  
                    
                      
                        
                          William
                            JewsExhibit
      4.6

     

    AMENDMENT
      NO. 2

    to

    RIGHTS
      AGREEMENT

    between

    

    BEACON
      POWER CORPORATION

    and

    EQUISERVE
      TRUST COMPANY, N.A.

    

    Dated
      as
      of August 8, 2007

    

    AMENDMENT
      NO. 2 dated as of August 8, 2007 to Rights Agreement, dated as of September
      25,
      2002, between Beacon Power Corporation, a Delaware corporation (the
“Company”),
      and
Computershare
      Trust Company, N.A. (fka
      Equiserve
      Trust Company, N.A.), as Rights Agent (the “Rights
      Agent”),
      as
      amended by Amendment No. 1 dated as of December 27, 2002 (as amended, the
“Rights
      Agreement”).
      Capitalized terms used but not defined herein have the meanings ascribed to
      such
      terms in the Rights Agreement. 

    

    WHEREAS,
      the holdings of Perseus Capital L.L.C. in the Company and Persons who are
      Beneficial Owners of the Company through Perseus Capital L.L.C. (collectively
      “Perseus”)
      have
      significantly decreased; and

    

    WHEREAS,
      the Board of Directors of the Company (the “Board”)
      has
      resolved to amend the Rights Agreement to delete the special provisions
      applicable to Perseus in the Rights Agreement pursuant to Section 27 of the
      Rights Agreement.

    

    NOW
      THEREFORE, in consideration of the premises and mutual agreements contained
      herein, the parties hereto agree as follows:

    

    1. AMENDMENTS.
      The Rights Agreement is amended as follows:

    

    
      	1.1  	
              Section
                1(a) (Definition of “Acquiring Person”) is amended to delete the
                references to Perseus Capital and affiliates, and restated in its
                entirety
                to read as follows: 

            

    

    

    ““Acquiring
      Person” shall mean any Person who or which, together with all Affiliates and
      Associates of such Person, shall be the Beneficial Owner of 15% or more of
      the
      Common Shares of the Company, but shall not include (i) the Company, any
      Subsidiary of the Company, any employee benefit or compensation plan of the
      Company or of any Subsidiary of the Company, or any Person holding Common Shares
      for or pursuant to the terms of any such plan (each, an “Exempt Person”), (ii)
      any such Person who has become and is the Beneficial Owner of 15% or more of
      the
      Common Shares of the Company solely as a result of (A) the acquisition by such
      Person or one or more of its Affiliates or Associates of Beneficial Ownership
      of
      additional Common Shares if such acquisition was made in the good faith belief
      that such acquisition would not (x) cause the Beneficial Ownership by such
      Person, together with its Affiliates and Associates, to be 15% or more of the
      Common Shares of the Company outstanding at the time of such acquisition and
      such good faith belief was based on the good faith reliance on information
      contained in publicly filed reports or documents of the Company that are
      inaccurate or out-of-date or (y) otherwise cause a Distribution Date or the
      adjustment provided for in Section 11(a) to occur or (B) the acquisition by
      such
      Person or one or more of its Affiliates or Associates of Beneficial Ownership
      of
      additional Common Shares of the Company if the Board of Directors determines
      that such acquisition was made in good faith without the knowledge by such
      Person or Affiliates or Associates that such Person would thereby become an
      Acquiring Person, which determination of the Board of Directors shall be
      conclusive and binding on such Person, the Rights Agent, the holders of the
      Rights and all other Persons or (iii) any such Person who has become and is
      the
      Beneficial Owner of 15% or more of the Common Shares of the Company solely
      as a
      result of the operation of part (iii) of the definition of Beneficial Ownership
      if, in the sole opinion of the Directors, the agreement, arrangement or
      understanding that gives rise to the Beneficial Ownership was already extant
      on
      the date hereof, provided that Beneficial Ownership of no more than 5% of the
      Common Shares of the Company has been acquired by the parties to such agreement,
      arrangement or understanding in the aggregate after the date hereof.
      Notwithstanding the foregoing, if any Person that is not an Acquiring Person
      due
      to (ii)(A) or (ii)(B) of the prior sentence does not reduce its percentage
      of
      Beneficial Ownership of Common Shares of the Company to less than 15% by the
      Close of Business on the tenth calendar day after notice from the Company (the
      date of notice being the first day) that such Person's Beneficial Ownership
      of
      Common Shares would make it an Acquiring Person, such Person shall, at the
      end
      of such ten calendar day period, become an Acquiring Person (and such clause
      (ii)(A) or (ii)(B) shall no longer apply to such Person). For purposes of this
      definition, the determination whether any Person acted in “good faith” shall be
      conclusively determined by the Board of Directors. Notwithstanding anything
      in
      this definition of Acquiring Person to the contrary, no Person shall become
      an
“Acquiring Person” as the result of an acquisition of Common Shares by the
      Company which, by reducing the number of shares outstanding, increases the
      proportionate number of shares beneficially owned by such Person to 15% or
      more
      of the Common Shares of the Company; provided, however, that if a Person shall
      become the Beneficial Owner of 15% or more of the Common Shares of the Company
      by reason of share acquisitions by the Company and shall, after such share
      acquisitions by the Company, become the Beneficial owner of any additional
      Common Shares of the Company (other than pursuant to a dividend or distribution
      paid or made by the Company on the outstanding Common Shares or pursuant to
      a
      split or subdivision of the outstanding Common Shares), then such Person shall
      be deemed to be an “Acquiring Person” unless upon becoming the Beneficial Owner
      of such additional Common Shares such Person does not beneficially own 15%
      or
      more of the Common Shares.”

     

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

    

    
      	1.2  	
              The
                address of the Rights Agent for notice purposes in Section 26 is
                deleted
                in its entirety and replaced with the
                following:

            

    

    

    “Computershare
      Trust Company, N.A.

    250
      Royall Street

    Canton,
      Massachusetts 02021

    Attention:
      Client Administration”

    

    
      	1.3  	
              The
                following is added to the Rights Agreement as new Section
                34:

            

    

    

    “SECTION
      34. Force Majeure.

    

    Notwithstanding
      anything to the contrary contained herein, the Rights Agent shall not be liable
      for any delays or failures in performance resulting from acts beyond its
      reasonable control, including, without limitation, acts of God, terrorist acts,
      shortage of supply, breakdowns or malfunctions, interruptions or malfunction
      of
      computer facilities, or loss of data due to power failures or mechanical
      difficulties with information storage or retrieval systems, labor difficulties,
      war, or civil unrest.”

     

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

     

     

    
      	1.4  	
              The
                second full paragraph of Exhibit C (Summary of Rights to Purchase
                Preferred Shares) is amended to delete the references to Perseus
                Capital
                and affiliates, and then restated in its entirety as
                follows:

            

    

    

    “Until
      the earlier to occur of (i) 10 days following a public announcement that a
      person or group of affiliated or associated persons (with certain exceptions,
      an
“Acquiring Person”) have acquired beneficial ownership of 15% or more of the
      outstanding Common Shares or (ii) such date, if any, as may be designated by
      the
      Board of Directors of the Company following the commencement of, or first public
      disclosure of an intention to commence, a tender or exchange offer for
      outstanding Common Shares which could result in such person or group becoming
      the beneficial owner of more than 15% of the outstanding Common Shares (the
      earlier of such dates being the “Distribution Date”), the Rights will not be
      represented by a separate certificate, and will not be transferable apart from
      the Common Stock, but will instead be evidenced, (i) with respect to any of
      the
      shares of Common Stock held in uncertificated book-entry form (a “Book-Entry”)
      outstanding as of the Record Date, by such Book-Entry and (ii) with respect
      to
      the shares of Common Stock evidenced by Common Stock certificates outstanding
      as
      of the Record Date, by such Common Stock certificates, together with a copy
      of
      this Summary of Rights.”

    

    2. Miscellaneous.
      

    

    
      	2.1  	
              No
                Further Amendments.
                Except as specifically amended hereby, the Rights Agreement shall
                remain
                unmodified and in full force and effect, and the Rights Agreement
                is
                hereby ratified and affirmed in all
                respects.

            

    

    

    
      	2.2  	
              Governing
                Law.
                This Amendment No. 2 shall be governed by and construed in accordance
                with
                the laws of the State of Delaware.

            

    

    

    
      	2.3  	
              Counterparts.
                This Amendment No. 2 may be executed in any number of counterparts
                and
                each of such counterparts shall for all purposes be deemed to be
                an
                original, and all such counterparts shall together constitute but
                one and
                the same instrument. 

            

    

    

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

    

    IN
      WITNESS WHEREOF, the parties hereto have caused this Amendment No. 2 to be
      duly
      executed and delivered on August 8, 2007.

    
      	 	 	 
	 	BEACON POWER
              CORPORATION
	 
 	 
 	 
 
	
            	By:  	/s/ James M. Spiezio
	 	
              

              Name:
                James M. Spiezio

            
	 	
              Title:
                Chief Financial Officer

            

    
      	 	 	 
	 	
              COMPUTERSHARE
                TRUST COMPANY, N.A. 

              (fka
                EQUISERVE
                TRUST COMPANY, N.A.)

            
	 
 	 
 	 
 
	
            	By:  	/s/ Darlene M. DioDato
	 	
              

              Name:
                Darlene M. DioDato

            
	 	
              Title:
                Manager, Investor Services

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