Answer:
There are three types of AIDS in teaching.
1. Audio aid
2. Video aid/Visual aid
3. Audio Visual aid
Here we are going to see visual aid.
VISUAL AID:
As the name suggests visual aid facilities visual sense of the students and it also enhances the observation function of the students.
Visual aids are classify in two different categories.
1. Printed visual aids.
2. Non Printed visual aids.
Printed visual aids included books, newspaper and magazines.
Non printed visual aids included maps, models, projectors, charts, pictures, black models.