I am currently in DJ's wednesday physics class. It doesn't seem like anyone is leaving at this point. If you didn't make it into the term class I recommend doing the holiday course at town hall, because he teaches it (as of last term). He does say he'll check homework, but he really doesn't unless you are failing the quizzes due to conceptual problems. However, he is always willing to help students after class if he sees that they are willing to try.