Two years ago at Stanford, a Massive Open Online Course attracted 160,000 students. MOOC's looked like the future of higher education. The Internet would make college available to millions now going without it. Traditional college professors began to fear for their jobs. New research shows that MOOC's have not lived up to their promise, with very few students completing their courses. But, with millions invested, online learning is not going away. We hear how it's changing.