This report summarizes information found in a survey of the literature on radio as an educational medium which covered the published literature from many areas of the world. Comments on the literature reviewed are provided throughout the text, which is organized under seven major headings: (1) Radio, Mass Medium; (2) Radio, the Medium (broadening the scope of the medium, radio cassettes, radio as a medium for distance education, and radio for adult education); (3) Educational Radio (harnessing the medium for education, supporting visual materials and radio-vision, one sensory channel, and cost); (4) Comparing Educational Media; (5) Educational Radio--Developing the Programs (supporting communication and evaluation, training provisions, analyzing the audience, attitudes, rigorous instructional design, program preferences, and listening habits); (6) Suggested Model for Developing an Educational Radio Program; and (7) Suggested Model for Educational-Radio Script). (12 references) (CGD)