Hi Penelope: Good idea, for those classes have have access to the internet and LCD projector. I think students get off track because their intesest has faded, they're tired, the delivery is uninteresting, or they're distracted. To counteract, we need to first identify why, then focus on reversing. For instance, if they're not interested, do someting that piques their interest - relate the material to the workforce, change delivery styles, take a stretch break, or perhaps, tell an interesting story that brings them back to attention. Regards, Barry