The microcomputer as a medium of instruction is not inherently better or worse than any other medium be it lecture, television, print or practical experience. However, the microcomputer can simultaneously present instruction and collect data on student performance. In order for educators to evaluate the success of instruction presented by computer they must use the microcomputer as a perceptual tool to more sensitively monitor and modify the educational process. Thoughtful consideration of monitoring data by special educators promises to make the microcomputer a revolutionary aspect of school instruction. Such an educational revolution can extend to the delivery of special services provided that the time and ancillary supports needed to utilize performance are made available to school personnel.