Dr. Devlin and I discuss his "Introduction to Mathematical Thinking" MOOC (Massive Open Online Course) in great detail. 64,000 students registered for the very challenging course, although most didn't finish. What made the course challenging? How did grading work? How was support provided? What role did community play in the course? Why was this MOOC more like Facebook than Youtube? How might universities use MOOCs in the future to find the brightest students they might not find otherwise? How can MOOCs level the playing field in education? What's the next big thing for Dr. Devlin?