Indeed Rockwell out-Popped Warhol when he leant his name to a correspondencecourse called the Famous Artists School an easy-going coup for which Warhol would surely have given one of his Campbell's soup cans.
Expanding from this initial use of the U.S. Postal Service for coursecorrespondence, distance education moved towards live radio shows in 1921 and then televised broadcasts in 1963.
That audience is attractive to e-learning companies -- from correspondence programs that have hopped online to Net-only operations peddling curricula by the month or by the course.