Learner objectives, text, practice exercises and answer sheets are provided on the history of educational technology, which includes three major periods: Audiovisual Instruction (1920-1945), Audiovisual Communications (1945-date), and Instructional Systems Analysis and Design (1950-date). The terms "educational technology" and "instructional technology" are defined; ideas, themes, and techniques characteristic of each period are discussed; and a few important contributors to educational technology are mentioned. The module concludes with a statement concerning the societal need for educational technology and speculation about the future of the field. A 7-item reference list and an 18-item test are included. (Author/LMM)