Using effectivemess, efficiency, self-sustenance, and communicability as criteria, a conceptual model, called SCRAPE, was developed at the University of Texas to systematically describe educational behaviors. The key elements of the system are: (1) diagnosis and prescription, (2) instructional events, (3) achievement evaluation, and (4) consequent activities. Within each of these elements, behaviors can be classified as either input processing, recording, monitering, or output. Having outlined a course in this fashion, an instructor could then use the assistance of an instructional engineer to determine which teaching processes should be human and which should substitute technology; the engineer could then take the responsibility to design the nonhuman elements of the educational system. This report offers a paradigm for developing educational systems, and it includes detailed examples of the variables that could effect each element of the system. (EMH)