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.
I will use this in my classroom because it shows great classroom organization. Some students may not finish their work so having an area for them to place it and come back to finish it later is a very good idea so they can have a full opportunity to get credit for their work.