This is a variation on Tic-Tac-Toe which awards points for solving problems correctly and/or getting 3-in-a-row. You can choose to play it that way or just play a normal game of Tic-Tac-Toe.
This set includes 3 gameboards. The first one is just 2-step inequalities and the other two include harder inequalities. This allows you to play the game more than once or differentiate for your students.
Instructions for the modified game rules are at the top of each page.