<p>No grad student teaching classes, but plenty of postdocs. For what it’s worth, I don’t think that I’m special enough to be taught by nobel prize winners. Some people might complain that a postdoc who “only got his PhD this year” is teaching a sophomore-level course, but I’m fine with it. I wouldn’t even mind if a grad student taught that kind of course. It’s too hard for me to object to the concept of grad student teaching when I didn’t forfeit a single one of my AP credits.</p>