<p>Sometimes NOT teaching is useful. I’ve had profs in grad school who spend a lot of time telling us (a) how great they were and (b) networking tips and tricks for internships, jobs, and so on. We learn the material on our own and basically chat with the uber-prof during class. Pretty good deal. But the guy was the insider’s insider…</p>
<p>Undergrad math or similar, not so desirable.</p>