I teach Pro-Engineer Fundaments to both career students and industry students. In my class I use Powerpoint presentations with graphis to illustrate the dialog boxes, function of the command we are learning, and also why a certain command must function they way it was designed. I also give a lecture at the same time, and follow up with a demonstration of that command on a real life part. I have found that in most classes you have either verbal, written, or graphically types of people, so to cover all methods of learning I must incorportate this into my lesson plan. I do not use alot of pre recorded animation or audio,other then my lectures since both would tend to promote redundancey.