The Open University of Great Britain is an open-enrollment, home-based institution in which the majority of the instruction is conducted via broadcasts and correspondence. There are over 50,000 students ernolled in nearly 100 courses which require the transmission of 1,000 television and 1,000 radio broadcasts each year. Recently, research has been conducted to: 1) determine which programs are most successful; 2) provide information for research allocation decisions; and 3) determine which combination of resources produces the most effective multimedia presentation. A 1974 postal survey of 1,200 students examined specific programs and attempted to measure the level at which educational objectives were met, the cost and the convenience of the broadcast strategy, and the effectiveness of the media mix. Such studies have resulted in alterations of the courses considered and have illustrated the value of research to decision-making in educational broadcasting. (EMH)