40 Today my AP class did a team building activity. We do these every so often, because I think it helps the kids “bond” and also get to know each other and themselves in a team environment where they are working on something other than a physics problem or lab. In this case, they were using PVC pipes to move a marble from one location to another. Each pipe had to have two students touching it at all times, and I assigned the pairs randomly. The first time they did it, the marble went from a high spot to a low spot and the distance was within the range of all the tubes placed end-to-end. The second time, the starting and ending locations were farther apart and at the same level.
I still have a few kids who place blame or who shout disparaging remarks. Maybe by the end of the year they will have stopped doing that.