Audio Visual Aids are also called instructional material. Audio literally means “hearing” and “visual” means that which is found by seeing. So all such aids, which endeavor to make the knowledge clear to us through our sense are called “Audio Visual Aids” or Instructional Material. All these learning materials make the learning situations as real as possible and give us firsthand knowledge through the organs of hearing and seeing. Therefore, any device which can be used to make the learning experience more concrete and effective, more realistic and dynamic can be considered audio visual material.