The history of Citizens' Forum in Canada 1943-68 shows how it used a combination of radio, television, study pamphlets, and study groups, and led to many new programing techniques and formats for radio and television. Educational needs engendered by the Depression and World War II are described, along with earlier examples of public affairs broadcasting in Canada. Changes in Forum format, administrative organization (national and regional), and broadcasting policy are traced, with emphasis on changing postwar educational needs and demand, varying forms of panel discussion and feedback, the eventual deterioration of the group discussion component, and the characteristics of the televised version of the Forum. Major topic areas over the years have been (in order of numbers of broadcasts) International Affairs; Work; Government; Morality; Ethics; and Religion; and Education. Results of the review suggest that: radio educations's effectiveness is enhanced by listening groups; programs such as Citizens' Forum must alert and inform as well as educate; successful educational radio depends largely on skilled field leadership, extensive promotional activities, and continuity in format and broadcast time. (ly)