The document discusses instructional materials used in education. It begins by outlining the learner objectives which are to identify the three major variables to consider when selecting instructional materials, cite the three components of instructional materials, and discuss general principles for all media types. It then defines instructional materials and discusses their purpose to effectively communicate educational messages. The three major components of instructional materials are identified as the delivery system, content, and presentation. General principles for selecting instructional materials include matching the learner, task, and media characteristics. Types of materials discussed include written materials like handouts and books, demonstration materials like illustrations, and audiovisual materials. Developing one's own materials versus using commercially prepared ones is also addressed.