College of Future Could Be Come One, Come All

Teaching Introduction to Sociology is almost second nature to Mitchell Duneier, a professor at Princeton: he has taught it 30 times, and a textbook he co-wrote is in its eighth edition. But last summer, as he transformed the class into a free online course, he had to grapple with some brand-new questions: Where should he focus his gaze while a camera recorded the lectures? How could the 40,000 students who enrolled online share their ideas? And how would he know what they were learning?