Described is a generalized model for the evaluation of instructional materials and media designed to be usable by the Instructional Materials Centers/Regional Media Centers/Regional Resource Centers Network. The model is described as a guide to the inclusion of the critical elements in an evaluation problem situation. Discussed are a system for the identification and classification of instructional materials and media, instructional materials identification, a specific procedure for classification of information on instructional materials and media, measurement of teacher responses to and evaluations of instructional materials, and sequential analysis as a teacher judgment summarization technique. Also explored are procedures for the identification of exemplary materials criteria, and the appraisal of instructional materials and media by experts. Other topics considered are the optimizing of cooperative teacher behaviors in the field test setting, methodologies for the evaluation of instructional materials and media, and sequential analysis as a means of evaluating pupil performance. The author describes general procedures for selecting instructional materials as well as procedures for the selection of materials at various stages of the evaluative process. Appendixes contain a bibliography and a set of forms for evaluating instructional materials and media. (GW)