1975: And the Changes To Come
Film Based Teaching Machine. Student pushes one of four buttons to give answers and his score appears on paper slip at upper right. Teaching machines, expected to boom in the next decade, usually operate on the principle of repetition until the pupil understands. They aim to speed up the learning process and relieve teacher of much paper work in the classroom.
from 1975: And the Changes To Come by Arnold B. Barach