This illustrated booklet presents key points about the place of media in the classroom. The media subsystem is part of the total learning process. The professional media personnel and the teachers work together as a team. The media subsystem provides expertise in message design and in providing the resources for the students' educational experiences. Every school should have a professional media person as part of its staff to work with teachers and students and supervise a supporting staff, including media technicians, clerks, and aides. An instructional media center should be part of every school, providing for large and small group instruction, individualized study, and production of materials not otherwise available. Coordination, supervision, and leadership of the media sybsystem is needed at the district level. The district superintendent, principal, and media director and coordinator are all important in insuring a successful media subsystem. (JK)