This orientation course in educational media for teachers in secondary schools consists of nine illustrated lectures. Lecture topics are: (1) effective media use; (2) educational media for teaching and learning; (3) books and other printed media; (4) transparencies and the overhead projector; (5) slides, slide-sound programs, filmstrips, and films; (6) sound recordings and audio equipment; (7) the use of video in education; (8) the use of media in practice; and (9) planning media services for effective media use in schools. References are included for each lecture. (GL)