I enjoy varying my teaching style. My lectures are long, the class is 3.5 to 4 hours and my lectures are usually 2+ hours. I try to break it up with student discussion, asking each student to look up something pertinent for the chapter we are studying, and then present it to the class, teaching their fellow students; when each student has completed their topic, I generally praise the student and thank them, and also add something to the subject presented. This gives the students an opportunity to do some research, and hone their presentation and teaching skills to each other.