When we run into the situation where the class in general does not have the desired schooling or practical app what to do. Is it good to lower the class to their level thus leaving out the ones who are already there. NO Is it good to leave the level where you are so that the ones who are grasping it do not get bored. MAYBE What about this find a way to do both one way could be to have the ones who grasp the knowledge become kind of student helpers. Use their experience and knowledge to your benefit it works I do it often.. The other advantage to this is maybe it is not the information that is above their head but the instructors way of presenting it. I have been put to sleep many times by people that are lecturing and have the approach that this is the only way to learn this. To end my little rant say you are teaching electris on a car. Remember this we are there to teach them how to fix the problems not make them engineers that part was already done. HE HE