Three telecourse programs offering high school credit courses via interactive satellite communication are described and evaluated. German by Satellite and Physics by Satellite from Oklahoma State University feature biweekly 40-minute broadcasts with audio interaction via regular telephone lines and microcomputer voice recognition software at subscribing schools. Accelerated Learning of Spanish Project Via Satellite, sponsored by the Utah State Board of Education, offers first-year Spanish in 40-minute biweekly broadcasts with computerized voice synthesis and other media at subscribing schools. Broadcasts are videotaped and do not include audio talk-back components. The TI-IN Network Incorporated is the most widely distributed and fastest growing of the satellite systems. It transmits 20 different high school courses in daily live broadcasts using the teacher-present/student-recite method with audio interaction via telephone. The three programs offer exposure to learning experiences and technology not available in the subscribing schools, promote independent study skills, and present excellent instruction and materials. Weaknesses include communication difficulties between schools and program suppliers, lack of inservice training in two of the programs, and remote site equipment problems. Equalization of access to educational resources is the major advantage of instruction by satellite. Addresses of described programs and one new program are included. (LFL)