<p>I was a TA at Chicago. In my experience, TA’s seldom taught courses, but instead assisted the profs who did the teaching. Almost every class had a TA along with the prof, these folks are usually very accessible, hold review sessions, and try to be as helpful as possible. In my 6th or 7th year, I did teach one course when I was ABD, we (students and myself) seemed to have a good time and learn some things. There were only about 6 or 8 students in the class, so I couldn’t do much damage anyhow.</p>
<p>The Core only classes are capped at 25 students and, for the most part, taught by distinguished faculty members. My S has had outstanding professors, including Danielle Allen the Humanities Dean, and Sydney Nagel the famous physicist to name only two. He had an ABD student only for a clac course who he said was quite good. There is an exception to the Core cap, however. If a class meets requirements other than the core, it can have more students. For example, East Civilizations meets the Core Civ requirement and can be counted toward a concentration (major). It typically will have many more students, though most of these courses break down into groups of 15 or so students for discussion classes. Most of the early math and science courses fall under this category as well.</p>