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196 The Audio-Visual Handbook
placing some teacher with a reduced teaching load in charge of this work. A good choice for this is a science teacher or some other person with sufficient technical knowledge and administrative ability.
Ordering Visual Aids and Equipment. "The local director should acquaint himself with all the various sources of visual aids and should be in a position to inform his teachers as to the availability of the materials which they need. He should keep abreast of the advances made in all phases of visual instruction so that he can recommend the type of equipment to purchase and offer suggestions as to where the latest and best pictures may be secured. He should be so qualified and so prepared that he may at all times act in an advisory capacity in the purchase or rental of materials. His office should serve as the channel through which all materials may be ordered.
Instructing Local Teachers. "The local director should acquaint himself with the best visual aids teaching techniques and should strive to improve visual instruction in his classrooms both as regards the pedagogic and the mechanical aspects.
Making the Best and Widest Possible Use of Available Equipment. "In one of our leading Wisconsin junior high schools the local director has worked out an ingenious method for making the school's four motion picture projectors available among the fifty or sixty teachers in the building. Each week a chart with spaces for each day and hour of the following week for the four projectors is posted. On this chart each teacher indicates the day or days and the hours during which he wishes to use one of the projectors. Thus the maximum use is gotten from each projector, with the greatest benefit to all concerned. With each projector goes a screen which may be mounted on hooks conveniently placed in the front of each classroom. Similar methods can be worked out for handling other materials also.
Advantages of Centralized Control and Responsibility. "Projectors and other materials are in constant need of expert care, and unless some one person is held responsible for their care, they will soon get into such a state of disrepair that they will have little value. It is also essential to centralize the responsibility for the routing of materials and equipment and to see that they are promptly returned.
The Cost of Visual Instruction. "When consideration is given to the value received from a well planned and properly executed program of visual instruction, the necessary expenditure will seem but nominal. An average annual per pupil expenditure of from fifty cents to one dollar will probably bring greater returns than any other like expendi