SECTION 906 CERTIFICATION

                CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


Name of Issuer:  USAA INVESTMENT TRUST (except Total Return Strategy Fund)

In connection  with the Annual Report on Form N-CSR (Report) of the  above-named
issuer for the Funds for the period ended  November 30,  2005,  the  undersigned
hereby certifies, that:

1.   The Report fully complies with the  requirements  of Section 13(a) or 15(d)
     of the Securities Exchange Act of 1934; and

2.   The information  contained in the Report fairly  presents,  in all material
     respects, the financial condition and results of operations of the issuer.


Date: January 25, 2006                              /s/ CHRISTOPHER W. CLAUS
      ----------------                                 ---------------------
                                                        Christopher W. Claus
                                                        President










                            SECTION 906 CERTIFICATION

                CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


Name of Issuer:  USAA INVESTMENT TRUST (except Total Return Strategy Fund)

In connection  with the Annual Report on Form N-CSR (Report) of the  above-named
issuer for the Funds for the period ended  November 30,  2005,  the  undersigned
hereby certifies, that:

1.   The Report fully complies with the  requirements  of Section 13(a) or 15(d)
     of the Securities Exchange Act of 1934; and

2.   The information  contained in the Report fairly  presents,  in all material
     respects, the financial condition and results of operations of the issuer.



Date:  January 24, 2006                                /s/ DEBRA K. DUNN
       ----------------                                 ----------------
                                                           Debra K. Dunn
                                                           Treasurer