The instructional development (ID) process is a teaching method that can be applied to an entire course, unit, or subject. The ID process can be compared to the decision making stages in purchasing and designing a house. These stages involve such concepts as communication theory, audience analysis, and study of goals and objectives. The choice of ideal and practical strategies must be considered in terms of student needs and effectiveness of class presentation. Using media specialists to help in the selection of appropriate materials to carry out the lesson is the next step. Such evaluated materials can include films, filmstrips, tape recordings, slides, and games, as well as print resources. Selected materials are then tested with a small group of students from the classroom. If necessary, the strategy is modified and then put into practice. The six steps in using a successful instructional package are: (1) prepare yourself (the classroom teacher); (2) prepare the environment; (3) prepare the students; (4) use the medium; (5) review; and (6) test. This system of revising and selecting new materials and equipment is particularly appropriate to the use of films in the classroom. (FG)