I didn't say they work well. But they definitely work. And you can take an existing crappy partial solution like video lectures, and add support structures unti

I didn't say they work well. But they definitely work. And you can take an existing crappy partial solution like video lectures, and add support structures until you have something that in aggregate works as well as a university course. Plain vanilla MOOCs work well for a small minority, about 10% now, when no one cares at all about them. If you can't quadruple that by actually trying I'd be very surprised.