Partner work or independent work!! Student options!!
If students choose to work in partners they will be playing tic-tac-toe against their partner. The student chooses where they want to put their mark and both students have to answer the questions. If the student who made the mark does not get the problem correct then their teammate can steal their spot as long as they got the problem correct. Students go back and forth until someone wins.
If a student chooses to work independently they must pick three problems to solve that form a tic-tac-toe.