<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
This schedule contains Summary Financial Information extracted from the Form
N-SAR and the financial statements and is qualified in its entirety by
references to such documents.
</LEGEND>
<SERIES>
   <NUMBER> 042
   <NAME> NUVEEN MASSACHUSETTS INSURED MUNI BOND FUND - CLASS B
<MULTIPLIER> 1000

<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          FEB-29-2000
<PERIOD-START>                             MAR-01-1999
<PERIOD-END>                               FEB-29-2000
<INVESTMENTS-AT-COST>                            65413
<INVESTMENTS-AT-VALUE>                           65079
<RECEIVABLES>                                     1615
<ASSETS-OTHER>                                       1
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   66695
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          767
<TOTAL-LIABILITIES>                                767
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         66201
<SHARES-COMMON-STOCK>                              159
<SHARES-COMMON-PRIOR>                              156
<ACCUMULATED-NII-CURRENT>                           67
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                            (6)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         (334)
<NET-ASSETS>                                     65928
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                 4141
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     605
<NET-INVESTMENT-INCOME>                           3536
<REALIZED-GAINS-CURRENT>                            52
<APPREC-INCREASE-CURRENT>                       (5572)
<NET-CHANGE-FROM-OPS>                           (1984)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           66
<DISTRIBUTIONS-OF-GAINS>                             2
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                             45
<NUMBER-OF-SHARES-REDEEMED>                         44
<SHARES-REINVESTED>                                  1
<NET-CHANGE-IN-ASSETS>                          (5886)
<ACCUMULATED-NII-PRIOR>                             32
<ACCUMULATED-GAINS-PRIOR>                            9
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              380
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    615
<AVERAGE-NET-ASSETS>                              1568
<PER-SHARE-NAV-BEGIN>                            10.59
<PER-SHARE-NII>                                    .43
<PER-SHARE-GAIN-APPREC>                          (.81)
<PER-SHARE-DIVIDEND>                             (.42)
<PER-SHARE-DISTRIBUTIONS>                        (.01)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9.78
<EXPENSE-RATIO>                                   1.75


</TABLE>