Four instruments were selected or developed for the summative evaluation of the Mathematical Problem Solving Project and pilot tested. The instruments were: (1) Student Attitude Questionnaire (SAQ), developed and validated by the MPSP evaluation staff; (2) problems selected from the National Longitudinal Study of Mathematics Achievement (NLSMA); (3) the problem-solving subtest of the Stanford Achievement Test (SAT); and (4) Problem Solving Survey (PSS), developed by the MPSP evaluation staff. A detailed report on the choice, development, and analysis of the instruments is included. (MP)