Game for Pythagorean Theorem and the Distance Formula. Students choose 3 problems in any direction and solve. Bring the paper to me…get all 3 right, and you win! If not, keep playing! You (the student) are O’s, I (the teacher) am X’s. I will O your correct problems and X the incorrect ones. Be careful not to get 3 X’s in a row or I WIN! 4 game boards with key included. By Michelle Fries. (Note: Also available in a bundle of 30 boards covering 8 topics for $8.00)