The author attempts in this book to reveal what can reasonably be expected from the use of television for instructional purposes. He catalogs the many possible applications of television in instruction. He discusses the criteria for choosing television over another media, concluding that only those applications which reduce the responsibility of classroom teachers should be said to capture the fundamental virtue of the medium. The potential of television in the light of today's educational realities is discussed. He surveys briefly the technical aspects of the medium--production, storage, and transmission--and evaluates the various methods for effectiveness in an educational setting. (JY)