I teach a laboratory class, and for at least part of every class, I am involved in an activity in one part of the lab and cannot leave, sometimes for as long as two hours. During this period, I always have part of the class participating in the activity, but the nature of the activity prevents me from allowing everyone to participate equally. Any tips on how to keep the rest of the class busy? I can give them things to do, read, study, etc. but I guess in the end it comes down to me motivating them to be… >>>