A model for the development of computer-assisted instruction (CAI) is presented for the college classroom teacher. The following common software design models that have been helpful in developing CAI models are briefly reviewed: composite or structural design model, Jackson model, META stepwise refinement model, and higher-order software model. Design principles that encourage the development of good software are also explained--modularity, abstraction, localization, and hiding. The CAI design model is based on the META stepwise refinement model and consists of five phases: problem clarification, system design, blueprinting, CAI synthesis, and documentation development. The problem clarification phase is composed of three tasks: objective development, content research, and narrative synthesis. The purpose of system design is to prepare the instruction for computer coding. Blueprinting involves the development of a detailed description of the CAI from frame to frame and function to function. This phase involves two stages of development: frame development and frame design. CAI synthesis refers to the actual encoding of the computer, along with debugging and evaluation. Finally, documentation involves the development of manuals and technical data. (SW)