An intervention by John Hawks on Savage Minds suggests that, while seminars are a common format for advanced undergraduate and graduate education,
Seminar courses are often very poorly taught and professors routinely overrate the value of their sessions for students.
I found myself agreeing with him. But putting that aside, what, I wonder, makes a good seminar. Many of us here have participated in seminars and must, in at least some cases, have found the experience enjoyable or productive. What made those good seminars good ones?