When you say "fist to five check" students rate their understanding by holding up the appropriate number of fingers. The goal is for everyone to be in the green. Great way for students to self-assess their understanding and help you to gauge student understanding.
So cool! - The kids in the class loved this. They can't tell time, but anytime that they wanted to know what it was time to go outside, I would just tell them "when the real clock looks like the greem clock, it will be time to go outside"