Hi Mike: Questioning is a good method to test if students are listening. It's a bummer when no one can answer the first, second or third question about what you've just spent time and effort teaching. But of course, that's not always the case, and sometimes when a question is asked, it snaps students out their lull, and brings the focus back on target. Another way to do something similar is to change the pace a bit with an example or story related to your topic. This zero's in on students whose mind is wandering (most times). Regards, Barry