<p>Goldenboy is just dead wrong: TAs at Princeton do exactly what TAs do at Michigan, they lead discussion sections of big lecture classes. Except at Princeton they call it “proctoring” and they pretend it’s not teaching, but the function, and the role of the TA, is just exactly the same. And there are a lot of big lecture classes at Princeton; if you do the math, you’ll see that on average students at Princeton spend more time in large (50+) classes than in small (<20) classes.</p>