This reivew of research examines the effectiveness of computer-assisted-instruction (CAI) in raising the achievement levels of students at various levels and areas of instruction. The review studies four main categories of material written about CAI: (1) opinion papers; (2) descriptions of available hardware; (3) reports evaluating the effectiveness of CAI packages; and (4) guidelines and suggestions for authors of CAI software. It is suggested that CAI works best with low achievers and lower grade levels. At higher levels the novelty of computers is gone and no significant difference due to the use of CAI has been found over most other procedures. Contains 25 references. (ML)