This paper describes a computer-managed instruction (CMI) system used in teaching self-instructional modules in an educational media course covering communication theory, instructional design, media utilization, and production. The system is based on three underlying assumptions about the course: (1) the course consists of a set of discrete modules or topics, each containing units linked in some definable hierarchical structure; (2) tests consist of multiple choice items or questions to which the answer is a small integer number; and (3) once a student has chosen to study a particular unit, then the test for that unit must be passed before he may proceed to any other unit. The system was used by one section of students in the fall of 1977, refinements were made, and it was used with all sections in the fall semester of 1978 and 1979. Comments by students indicated that the majority were enthusiastic about the system for two reasons: using the terminal and the management system was an intrinsically interesting experience, and the system allowed students to assess their own performance and keep track of their own progress. (CHC)