This paper describes attempts to evaluate whether teachers who had participated in a staff development program could apply what they had learned in a controlled, specific situation significantly better than teachers who had not had the training. The program under evaluation provided training in peer supervision and evaluation. Test results covering knowledge of the techniques taught in the program showed significant gains by participants. Questionnaires and monitoring reports indicated that teachers did use the peer supervision methods learned through the project. An attempt is being made to develop and standardize an instrument to ascertain application of strategies taught in the course. A major revision of the evaluation procedure was in using a 16mm film instead of a videotaped lesson for the peer supervision participants to evaluate, with structured sections of a response form measuring three areas--observation, analyses, and conferences. Recommendations for future revision of the testing and evaluation procedures include: (1) pretraining staff members in scoring techniques; (2) requiring more specific statements from participants; and (3) measuring concurrent and predictive validity of the instrument from field observation. (JD)