It is no accident that the first use of computers in school systems was to arrange schedules for students and teachers. The proper use of the computer in the classroom is as a replacement for the clock and its strict temporal schedule. By conveying information through self-instructional content, the computer can schedule work for pupils in appropriate ratio-schedules so that each learner can move at his own pace. The computer can estimate completion time for individual students so that teacher-time can be made more available. The most important single service the computer can render to the classroom is that of increasing the available time of the teacher without increasing the number of work hours in a day. Available time is increased by decreasing wasted time. Wasted time is defined as time spent by students who are waiting for the teacher or for their peers or are listening to content irrelevant to their individual needs. The sophistication of the computer is such that it can cumulate these bits of time, and present them to the teacher in useable form. The computer can also be programmed to aid the teacher in equitably distributing time to students according to their needs and demands. The computer is thus an impartial regulator similar to but much more human-oriented than the clock.