A perspective on MOOCs as experimentation | john hawks weblog.
The real challenge for a MOOC is to make the students into active participants. To give learners a meaningful opportunity to help build knowledge instead of just witnessing others building it. That is where true learning happens.
Of course, the student really does in fact have to learn things, not just get the impression that she has. And then the other hard part is proving that she has indeed learned what she thinks she has–as well as other things that may not have been ostensibly part of the course, like how to think about interesting questions that can be solved in a reasonable period of time.