<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>                   6-MOS
<FISCAL-YEAR-END>                          FEB-28-2001
<PERIOD-START>                             MAR-01-2000
<PERIOD-END>                               AUG-31-2000
<INVESTMENTS-AT-COST>                            65739
<INVESTMENTS-AT-VALUE>                           67374
<RECEIVABLES>                                     1564
<ASSETS-OTHER>                                     325
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   69263
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          204
<TOTAL-LIABILITIES>                                204
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         37320
<SHARES-COMMON-STOCK>                              172
<SHARES-COMMON-PRIOR>                              159
<ACCUMULATED-NII-CURRENT>                           34
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                             69
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                          1636
<NET-ASSETS>                                     69059
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                 2027
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     324
<NET-INVESTMENT-INCOME>                           1703
<REALIZED-GAINS-CURRENT>                            75
<APPREC-INCREASE-CURRENT>                         1970
<NET-CHANGE-FROM-OPS>                             3748
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           35
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                             20
<NUMBER-OF-SHARES-REDEEMED>                          6
<SHARES-REINVESTED>                                  1
<NET-CHANGE-IN-ASSETS>                            3131
<ACCUMULATED-NII-PRIOR>                             67
<ACCUMULATED-GAINS-PRIOR>                          (7)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              185
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    327
<AVERAGE-NET-ASSETS>                              1615
<PER-SHARE-NAV-BEGIN>                             9.78
<PER-SHARE-NII>                                    .21
<PER-SHARE-GAIN-APPREC>                            .30
<PER-SHARE-DIVIDEND>                             (.21)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              10.08
<EXPENSE-RATIO>                                   1.84


</TABLE>