A well-planned and well-conducted evaluation can provide useful information to funding agencies, sponsoring institutions, instructors, and participants. Evaluating an instructional program, such as a workshop or institute, involves collecting, organizing, analyzing, and reporting data about several features of the program and its impact on the participants. Evaluating a workshop or institute can help in at least four areas: (1) planning (deciding on the overall content, major goals, and more detailed objectives of the workshop/institute); (2) programming (deciding on the procedures, faculty, facilities, budget, and other resources needed for running the workshop/institute); (3) conducting the workshop or institute; and (4) making changes. Planning the evaluation requires the same care that planning the program requires. Both the overall effectiveness of the program and the progress each participant makes toward the specified goals should be evaluated. Both of these levels can be addressed through formative evaluation during the program, summative evaluation at its conclusion, and follow-ups to assess the lasting value of the program. Suggestions are provided for conducting each of these types of evaluations. (SLD)