Two major topics are covered in this paper--the evaluation of instructional programs in general and the evaluation of computer-assisted instructional (CAI) course material during initial preparation. The first half of the paper reviews significant literature relating to instructional program evaluation and distinguishes between formative and summative evaluation. It then describes five models of evaluation, including three which specify procedures for the initial preparation of instructional programs, a fourth which represents a model for summative evaluation by an outsider, and a fifth which depicts several classes and data to be gathered during a comprehensive evaluation. The other major section of the paper deals with matters relating to CAI materials. Literature on the formative and summative evaluation of CAI programs is reviewed, followed by a discussion of consequential evaluation and an overview of some evaluative criteria. A model for CAI course preparation and evaluation is presented and recommendations for the inclusion of formative evaluation as an integral part of curriculum development are made. (Author/PB)