What type of class are you thinking of?
If its for the decision making and ethical and legal aspects, I'll suggest you look through Massad Ayoob's video old and new that are on youtube.
He offers insight from someone who has been called as an expert witness on numerous (legitimate) self defense cases. The videos on defensive gun usage will give you a lot of what he covers in his classes. If you are then interested in a class, go to his website.
