This study of the market for media-based educational materials for preschool to high school through 1990 was commissioned to inform learning technologies professionals about the markets that show the greatest potential for their products in schools. Organized into five major sections, the executive summary discusses: (1) the current education market, i.e., curriculum content decision making and the market for educational materials; (2) demographic, social and political, economic, and technological trends that will affect the market for educational materials over the next 5 to 10 years; (3) an overview of projected effects of these trends; (4) a detailed analysis of the projected effects of trends; and (5) the most promising subjects for new productions. Nine subject areas are identified as potential markets for the future: bilingual education, basic skills and application, science education, social studies education, vocational and career education, preschool education, health and social issues education, fine arts education, and foreign language education. Five charts summarize market opportunities for public broadcasters by curricular area and target grade level for bilingual, science, social studies, vocational and career, and basic skills education. (JB)