Hi Isaac:
Great exercise - I'm sure that leaves a lasting memory. More often, student sort of just "zone out" for a time. The trick here is to keep all students as fully engaged as possible for the entire period or lesson. Methods such as calling students, having them write answers on the white board, or engage with classmates in discussion groups leesens the chance of zoning out. Keeping busyu with physical movement, however that is accomplished works best.
Regards, Barry
