<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> 051
   <NAME> NUVEEN FLAGSHIP MISSOURI MUNICIPAL BOND FUND - CLASS A
<MULTIPLIER> 1000

<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAY-31-2000
<PERIOD-START>                             JUN-01-1999
<PERIOD-END>                               MAY-31-2000
<INVESTMENTS-AT-COST>                           210861
<INVESTMENTS-AT-VALUE>                          205066
<RECEIVABLES>                                     4202
<ASSETS-OTHER>                                    3856
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  213124
<PAYABLE-FOR-SECURITIES>                          2178
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          840
<TOTAL-LIABILITIES>                               3018
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        217817
<SHARES-COMMON-STOCK>                            19087
<SHARES-COMMON-PRIOR>                            21447
<ACCUMULATED-NII-CURRENT>                          114
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                         (2030)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        (5795)
<NET-ASSETS>                                    210106
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                14360
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    2299
<NET-INVESTMENT-INCOME>                          12061
<REALIZED-GAINS-CURRENT>                        (2020)
<APPREC-INCREASE-CURRENT>                      (19302)
<NET-CHANGE-FROM-OPS>                           (9261)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        11142
<DISTRIBUTIONS-OF-GAINS>                           181
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                           1628
<NUMBER-OF-SHARES-REDEEMED>                       4424
<SHARES-REINVESTED>                                436
<NET-CHANGE-IN-ASSETS>                         (47515)
<ACCUMULATED-NII-PRIOR>                              5
<ACCUMULATED-GAINS-PRIOR>                          196
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             1258
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   2315
<AVERAGE-NET-ASSETS>                            213759
<PER-SHARE-NAV-BEGIN>                            11.12
<PER-SHARE-NII>                                    .55
<PER-SHARE-GAIN-APPREC>                          (.93)
<PER-SHARE-DIVIDEND>                             (.55)
<PER-SHARE-DISTRIBUTIONS>                        (.01)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              10.18
<EXPENSE-RATIO>                                    .95


</TABLE>