History of Audio - Visual Aids : A Dutch Humanist theologist & writer desretrious Erasmus (1466-1536) disclosed memorization as a technique of learning and advocated that the children should learn through the aids of pictures or other visuals. While John Amos Comenius (1592-1670) prepared a book known as Orbis Sensilium Pictus (the word of sense objects) which contained near about 150 pictures on aspects of every day life. This is the is considered as a illustrated book for the children education. The term visual education was use by Nelson Greence in 1926. Aric identified four revolutions in education :
1. Education from home to school.
2. Written word as a tool of education.
3. Invention of printing & use of books
4. Use of electronic media i.e Radio, T.V, tape reorder & Computer in education.
Features of good Teaching Aids.
1. They should meaningful & purposeful.
2. They should be accurate in all respects.
3. They should be simple.
4. They should be cheap.
5. As far as they should be update.
6. They should motivate the learner as well as to the teacher also.
Principles of Audio Visual Aids ; For effective teaching to take place a a good method must be adopted by the teacher . The teacher is always free to choose effective audio visual aids in the class room. Of courses there are also certain principles of Audio – Visual Aids in teaching methodology. They are as follows:
1. Principle of Selection : 1. The age level 2. Other personality angles.3. They should have specific educational values 4. They should help in the realization of learning desired objectives.
2. Principle of Preparation : 1. As far as possible, the local material