<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> 031
<NAME> NUVEEN FLAGSHIP ALL-AMERICAN MUNI BOND FUND - CLASS A
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> APR-30-2000
<PERIOD-START> MAY-01-1999
<PERIOD-END> APR-30-2000
<INVESTMENTS-AT-COST> 357813
<INVESTMENTS-AT-VALUE> 352217
<RECEIVABLES> 17663
<ASSETS-OTHER> 518
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 370398
<PAYABLE-FOR-SECURITIES> 6196
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1974
<TOTAL-LIABILITIES> 8170
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 376999
<SHARES-COMMON-STOCK> 25068
<SHARES-COMMON-PRIOR> 27307
<ACCUMULATED-NII-CURRENT> 4
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (9178)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (5597)
<NET-ASSETS> 362228
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 24390
<OTHER-INCOME> 0
<EXPENSES-NET> 3964
<NET-INVESTMENT-INCOME> 20426
<REALIZED-GAINS-CURRENT> (9176)
<APPREC-INCREASE-CURRENT> (31918)
<NET-CHANGE-FROM-OPS> (20668)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 15132
<DISTRIBUTIONS-OF-GAINS> 654
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 13501
<NUMBER-OF-SHARES-REDEEMED> 16168
<SHARES-REINVESTED> 428
<NET-CHANGE-IN-ASSETS> (64588)
<ACCUMULATED-NII-PRIOR> 1
<ACCUMULATED-GAINS-PRIOR> 1109
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1939
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 4001
<AVERAGE-NET-ASSETS> 285414
<PER-SHARE-NAV-BEGIN> 11.43
<PER-SHARE-NII> .56
<PER-SHARE-GAIN-APPREC> (1.08)
<PER-SHARE-DIVIDEND> (.56)
<PER-SHARE-DISTRIBUTIONS> (.02)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.33
<EXPENSE-RATIO> .83
</TABLE>
