STEM idea: One of the most popular challenges is the Spaghetti Tower (sometimes called Marshmallow Tower) challenge. It's actually a completely doable, fun way for your kids to experiment, collaborate, and problem solve. by nina
Animated timers that you can put on the projector. Gives students a visual for the time they have remaining. Plus a fun surprise (noise cue) when time is up! :) Sometimes kids just need the visual rather than a timer on a desk.