This document discusses different types of instructional materials and aids that can be used to improve teaching and learning. It describes instructional materials as educational resources that deliver content and improve students' knowledge. Some key types of instructional aids covered include printed materials like textbooks and workbooks, sounds and visual resources like films and videos, pictures and pictorial representations like photographs and drawings, symbolic and graphic representations like maps and charts, and microcomputer resources like printers, scanners, and educational software. The document emphasizes that instructional materials can increase teaching effectiveness, stimulate student interest, and help make learning more permanent.