I use this Powerpoint as an end-of-year Math review for my second graders. I set up two "stations" with a bell or buzzer in the middle. Two students of (fairly) equal mathematical ability go up against each other to solve problems to earn points for their respective teams. My students absolutely LOVE this game. It's so simple, but they beg to play it again and again. I believe it could also be used with third graders at the beginning of the school year.
~Problems consist of 2-digit/3-digit addition and subtraction, basic multiplication facts, and word problems.
~Game could also be used for standardized test prep.