WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000894192
<NAME> MUNDER GROWTH OPPORTUNITIES FUND
<SERIES>
<NUMBER> 151
<NAME> CLASS A
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> JUN-30-2000
<PERIOD-START> JUL-01-1999
<PERIOD-END> JUN-30-2000
<INVESTMENTS-AT-COST> 11176731
<INVESTMENTS-AT-VALUE> 13019010
<RECEIVABLES> 15483
<ASSETS-OTHER> 1515
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 13036008
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 12269
<TOTAL-LIABILITIES> 12269
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 9868709
<SHARES-COMMON-STOCK> 841704
<SHARES-COMMON-PRIOR> 316395
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1312751
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1842279
<NET-ASSETS> 13023739
<DIVIDEND-INCOME> 24946
<INTEREST-INCOME> 22905
<OTHER-INCOME> 0
<EXPENSES-NET> (76053)
<NET-INVESTMENT-INCOME> (28202)
<REALIZED-GAINS-CURRENT> 1355201
<APPREC-INCREASE-CURRENT> 1481757
<NET-CHANGE-FROM-OPS> 2808756
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (70348)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 603228
<NUMBER-OF-SHARES-REDEEMED> (85083)
<SHARES-REINVESTED> 7164
<NET-CHANGE-IN-ASSETS> 9589532
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 56100
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 48000
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 79000
<AVERAGE-NET-ASSETS> 6460000
<PER-SHARE-NAV-BEGIN> 10.85
<PER-SHARE-NII> (0.03)
<PER-SHARE-GAIN-APPREC> 4.87
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> (0.22)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 15.47
<EXPENSE-RATIO> 1.18
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>