Because my Halloween version of this tic-tac-toe game has been so popular, I made this one to add to your math center during the month of November. Students will work in pairs (one X and one O). They will take turns rolling two dice, multiplying the two numbers, and marking them with a dry erase marker if the number is on the card. The person that makes a tic-tac-toe wins. Erase the cards, swap with another group, and the game is ready to go again.