Originally Posted by shadoquad

I had teachers like this. It was obvious that I couldn't learn from them in class. One of them, I would go to his office hours, where he was actually very knowledgeable and willing to help. The other one, who I'd failed a course with before, I knew he was a complete waste of time, but that he never strayed from the book materials, so I simply paid no attention to him and read the book, did the homeworks, showed up to take tests/quizzes.

I think it's a judgment call.