Teach to the....
I liked how one of the videos emphasized teaching to the class as opposed to teaching the material only. I don't think this is an either/or - in other words, either teach the material or teach to the class. I think the instructor must be thoroughly knowledgable in the subject matter and also thoroughly knowledgeable with the type of class he/she is teaching. This way, the instructor can teach specifically to the class; adapting and adopting other styles to best suit the class.
