This document discusses instructional materials, which are educational resources used to improve student learning. It outlines the values and importance of instructional materials, such as increasing teacher effectiveness and stimulating student interest. Some criteria for selecting materials are appropriateness, authenticity, interest, organization, balance, and cost. Basic guidelines for using instructional materials include considering the size, color, durability, economy, ease of handling, relevance, and novelty of the materials. The document also describes different kinds of instructional materials, including printed materials, audio aids, visual aids, audiovisual aids, demonstrations, and community resources.