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Organizing the Audio-Visual Service 187
There are various types of sound and audio-visual aids which are particularly good to use in the intermediate grades, such as the more advanced types of phonograph records; particularly those designed for use in early music instruction, or in the teaching of music appreciation. Recorded works of literature, and musical recordings which are correlated with the study of literature, history, or geography, may be used with excellent results in the intermediate grades. Some speech instruction is often given in these grades, making it desirable to use speech-recording equipment for the purpose of encouraging and measuring improvement.
There are also many radio programs which are suitable for intermediate groups.
In the Secondary Schools. Probably the greatest quantity of prepared visual aids are available for the use of the secondary schools. There are hundreds of reels of motion pictures, thousands of glass slides, phonograph records, hundreds of filmstrips, prepared sets of mounted pictures, stereographs, and exhibits. Teachers here have a wealth of material at their command.
In addition to fitting pupil-made and commercially prepared visual aids into the work of the high school, the science, geography, and history teachers have many opportunities to prepare their own materials, some of which are more helpful than much of the service available in prepared form. Maps can be traced on glass slides and projected for teaching and checking purposes. A map projected to the blackboard may be seen by everyone in the classroom and may be used as the basis for fixing locations. When it has served its purpose, the only erasure necessary is to turn off the projector. If it should be necessary to identify certain things on the map with chalk, no harm is done to the projected map.
Outline slides of insects, flowers, plants, animals, life cycles, and of almost any other group of subjects may be prepared on glass slides. Typewritten information, questions, etc., may be placed on cellophane slides for projection. These simply constructed aids may be used for identification, study, or testing purposes.
High schools are finding it more and more advisable to depend upon visual aids for assistance in developing special projects. Frequently the work of the school is photographed with a still camera and made into filmstrips or 2" x 2" slides for projection, or is recorded on motion-picture film. Athletic events, commencement exercises, school plays, pageants, and other activities of the school may be recorded and preserved as a running story or history of the institution.