“On the Cost of Computation in Schools
A final word about the cost of doing all this. Turtles. music boxes. computer controlled motors and the like are less expensive than teletypes. Displays are slightly more expensive but becoming rapidly cheaper. So if. computers are being used in a school, there is no good economic argument for accepting the narrowness of the pure teletype terminal.”
Papert, S. and C. Solomon (1971). Twenty Things to Do with a Computer. Artificial Intelligence Memo # 248. Cambridge, MA, Massachusetts Institute of Technology.