The use of computer-produced materials remote from the terminal can revitalize teaching devices and techniques such as graded exercises, precision teaching, and even conventional text. Teachers need to be aware of inconsistencies in the quality of computer software and of logistical factors involved in the adoption of computer assisted instruction (CAI) in their schools. Six criteria that are relevant to learning in general against which the validity of a given program of CAI might be judged are (1) the law of frequency, (2) motivation, (3) multisensory stimulation, (4) attention, (5) learning by doing, and (6) analysis of learning task into concurrent components and prerequisite antecedents. Practice exercises in spelling and in basic arithmetic are good examples of computer-generated material. Such pedagogically sound teaching material can result from cooperative communication between good, competent, and articulate teachers on the one hand and good, competent, and understanding programers on the other. (An extensive appendix includes figures that depict part of a computer produced diagnostic test, a computer version of an exercise in basic arithmetic, and a computer printout that illustrates the concepts of product-moment correlation and regression.) (AEA)