Why use flashcards or worksheets to practice basic facts when you can use a game instead? You can use these free fact strips to make Jenga into a game students will love to play again and again. If you don't have a class Jenga set already, you can probably find one for a dollar or two at a thrift store.
The game requires a little prep since you must cut the strips and tape them to the Jenga blocks (but this would also be a swell job for a parent volunteer). But once the game is ready, it can be played all year long. Perfect for any math center!
You can also get a fun Get-to-Know you Jenga game for free right here!
Find more great Math Center ideas at Laura Candler's Corkboard Connections!