Modern technology has developed the primitive still projector into a powerful audiovisual tool. In response to a growing need for a comprehensive guide to the uses of such an aid, this booklet offers, in its first six chapters, a detailed examination of the various types of still projectors and supplementary equipment, care and maintenance of the…

Although television and other audiovisual aids have proven to be valuable educational tools when intelligently employed, teachers in many countries fail to understand the usefulness of these aids. A review of developments in the U.S., France, Italy, the Netherlands, and Great Britain shows that many successful courses have been given on both…