Physics: Random Presenter
I had each lab group whiteboard and present their solution to one of the lab practical stations. I assigned which practical each group would present so I could make sure we saw all four stations. I also, when possible, tried to pick groups that used different approaches, like the two groups in the photo who had to find the mass of some washers using a known mass, a spring, a ruler, and a stopwatch. In one of my classes, I tried rolling a dice to decide who would talk on behalf of the group, and I saw some students who tend to let someone else in their group figure things out really engaging to make sure they knew enough to present if picked. I need to use this strategy more often.
Chemistry: Mistakes Game
Students worked on writing equations for nuclear reactions, then we played the mistakes game with some problems.