Today, we played the Mistake Game in AP Calculus. My class is 20, which is big for my school, and it's filled with nutty senior dudes, so I was really nervous it wouldn't work. Despite it taking longer to get them to make their solutions than I would have liked, they did a nice job with the discussion part of the activity. The only reason we had time for it in the first place was because I am having them learn something via video tonight. I'm excited about experimenting with this if it gives us more time for activities like is!