<p>Numerous classes are lecture classes of that size, too many to name (many econ classes, lower level CS classes, science classes, some applied math classes, City Politics just to start). Some classes are larger than 200 as well (which is why it’s best to choose a balance of courses). Some of these courses break down into (optional or mandatory) sections with TAs but most do not. I’ve never heard of a professor running more than 1 section and even this is very uncommon. In CS, it’s not even too uncommon for the TAs to lecture…</p>