Improving the program of audio-visual aids

Audio-visual methods of teaching are by far the oldest means of instruction in the world, and for many purposes are still the most effective. Before man could talk or write, his learning took place through direct experiencing. Primitive man learned to convey his thoughts by signs, facial expressions, and crude imitations long before he developed a vocabulary with which to express them orally. Often he drew upon the sand of the seashore, or arranged stones in a certain order, or made sketches on the wall of the caves, or used one of a dozen different ways of conveying ideas by an appeal to the senses. Boys were taught to fish and hunt and girls to cook through imitations, observations, and participation. Later came picture writing, and centuries later, the many forms of the alphabets which found their way onto clay tablets.