How optimistic faculty members are about the educational value of MOOCs seems to turn largely on what they think of as the status quo classroom experience. Colleagues at elite institutions, especially small liberal arts colleges, are generally skeptical, because they think of what they do in their classrooms as being very intellectually alive, and cannot see how that could be replicated online. But most of the credit hours at my institution are not taught in small, intellectually lively, classes. My own department keeps our classes small for majors, and offers very few classes larger than 100 students—still, I am pretty sure that in any given semester most of our credit hours are taken in rooms with 50 or more students. I know of one social science department which offers no classes with fewer than 70 students, even for majors, and many departments in which lectures with 300 or more students are commonplace. It is easy to see how MOOCs could replace such classes.