The audio-visual handbook (1942)

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68 The Audio-Visual Handbook negatives can be transferred to photographic glass slides with ease. The process may be learned in a short time, and the enterprising teacher will be able to prepare, during vacation periods, much excellent ma Photo Courtesy Spencer Lens Co. Routine Use of Slides terial to be used through the academic year. The preparation of such materials should be of special interest to geography, nature study, and agriculture teachers who find many situations during the summer providing desirable teaching material to be used in winter classes. Purposes Slides Serve. There are several purposes which lantern slides may serve in the usual teaching situation. They may be used in the consideration of any topic to stimulate interest or to introduce the new subject matter. They may be used to develop a background for the material to follow, either in discussion or in the presentation of other types of visual aids, including the motion picture. They may be used during the discussion or study periods to clinch essential facts, to present vocabulary in the teaching of reading, or to help timid children recall facts they wish to emphasize in connection with classwork. They may be used at the close of the discussion of any topic as a very effective review. The time and place for using the projected slides will need to be determined by the teacher in each situation. A