<TABLE> <S> <C><ARTICLE>    6<CIK>    0000811869<NAME>    The AAL Mu<SERIES>    <NAME>    The AAL Mid Cap Institutional Index Fund    <NUMBER>    141</SERIES><MULTIPLIER>    1<S>                                                      <C><PERIOD-TYPE>                                          6-MOS<PERIOD-START>                                   May-01-2000<FISCAL-YEAR-END>                                Apr-30-2001<PERIOD-END>                                     Oct-31-2000<INVESTMENTS-AT-COST>                             11,497,425<INVESTMENTS-AT-VALUE>                            12,386,465<RECEIVABLES>                                         87,637<ASSETS-OTHER>                                        37,560<OTHER-ITEMS-ASSETS>                                       0<TOTAL-ASSETS>                                    12,511,662<PAYABLE-FOR-SECURITIES>                             155,550<SENIOR-LONG-TERM-DEBT>                                    0<OTHER-ITEMS-LIABILITIES>                             65,514<TOTAL-LIABILITIES>                                  221,064<SENIOR-EQUITY>                                            0<PAID-IN-CAPITAL-COMMON>                          10,774,307<SHARES-COMMON-STOCK>                              1,043,678<SHARES-COMMON-PRIOR>                                814,985<ACCUMULATED-NII-CURRENT>                             81,197<OVERDISTRIBUTION-NII>                                     0<ACCUMULATED-NET-GAINS>                              546,054<OVERDISTRIBUTION-GAINS>                                   0<ACCUM-APPREC-OR-DEPREC>                             889,040<NET-ASSETS>                                      12,290,598<DIVIDEND-INCOME>                                     55,835<INTEREST-INCOME>                                      4,016<OTHER-INCOME>                                             0<EXPENSES-NET>                                        10,600<NET-INVESTMENT-INCOME>                               49,251<REALIZED-GAINS-CURRENT>                             303,984<APPREC-INCREASE-CURRENT>                            452,997<NET-CHANGE-FROM-OPS>                                806,232<EQUALIZATION>                                             0<DISTRIBUTIONS-OF-INCOME>                                  0<DISTRIBUTIONS-OF-GAINS>                                   0<DISTRIBUTIONS-OTHER>                                      0<NUMBER-OF-SHARES-SOLD>                              236,706<NUMBER-OF-SHARES-REDEEMED>                          (8,013)<SHARES-REINVESTED>                                        0<NET-CHANGE-IN-ASSETS>                             3,411,252<ACCUMULATED-NII-PRIOR>                               31,946<ACCUMULATED-GAINS-PRIOR>                            242,070<OVERDISTRIB-NII-PRIOR>                                    0<OVERDIST-NET-GAINS-PRIOR>                                 0<GROSS-ADVISORY-FEES>                                 13,233<INTEREST-EXPENSE>                                         0<GROSS-EXPENSE>                                       74,421<AVERAGE-NET-ASSETS>                              10,471,658<PER-SHARE-NAV-BEGIN>                                   10.9<PER-SHARE-NII>                                         0.04<PER-SHARE-GAIN-APPREC>                                 0.84<PER-SHARE-DIVIDEND>                                       0<PER-SHARE-DISTRIBUTIONS>                                  0<RETURNS-OF-CAPITAL>                                       0<PER-SHARE-NAV-END>                                    11.78<EXPENSE-RATIO>                                          0.2<FN></FN></TABLE>