Movie Trailer: "Detachment"

Detachment is a new movie about damaged students and a damaged teacher, and it stars Oscar winner Adrien Brody along with a supporting cast full of names and faces you'll recognize.  Here's the trailer:

Part of me's interested because it's a flick about teaching and education, but a bigger part of me is wary and weary already.  RottenTomatoes hasn't been too enthusiastic (giving the movie 55%), and I don't want get preached at, lectured, and hectored for two hours.  I want another Half Nelson, but I don't think I'm going to get something of that caliber.  Then again, Adrien Brody.  Maybe he can save the flick?  I'll catch this on DVD maybe.