I'm going to try to use more down time in useful review. I found a way to use vocabulary in a fun way! Using a soft ball the students toss the ball at the Math Word Wall and whatever the closest word is the student tells me the definition, draws an example, or communicates in some way to me that they understand what the word means. I am adapting this from one of the consultants that visits my school in math. She never had any down time in her classroom. Even having the groups to line up by answering a math problem. For example: "If you are in the group that is 24/12, you can line up, the next group that can line up is the number that is not prime or composite..."