Hi Lori:
Sometimes repitition is good, but if the well is dry there's little point in keep pumping. I don't allow students to not participate. At some point, the students and teachers have to have an understanding about class expectations. I think a lot has to do with the type of class, the time of day (or night), the topic, and the resources available and those being used by the teacher. All can be factors.
Regards, Barry
