The president of Northwestern University predicts online education in 1934:
The university of twenty-five years from now will be a different looking place, says President Scott of Northwestern. Instead of concentrating faculty and students around a campus, they will “commute” by air, and the university will be surrounded by airports and hangars. The course will be carried on, to a large extent, by radio and pictures


Also see similarly prescient predictions from Isaac Asimov and Arthur C. Clarke.