<p>I know chem 33 and bio 20 do not break down into sections. We have lab, but that’s facilitated by a completely different professor and then broken down once again into lab with TAs (who really are no helpful at all). I had a section with my professor once in an intro religious studies class and was WONDERFUL!!! I would say most sections are run by graduate TAs. I actually have a graduate student as my professor this summer and they’re normally very good teachers. Better than I would’ve originally thought. Granted, the department of which the class you’re in will generally tell you how good the grad students are.</p>