Okay, this one is addicting! I am thinking they should come out with an app for my phone....
Fruit Shoot Math!
You can practice any basic skills (adding, subtracting, multiplication, and division). This works great for individual student practice, small group, or whole group. I split my students into two groups and they had to try to beat the other teams scores. I find that if they are in a line it makes it easier to pass the pen back and forth to each other. They loved it!
I'm also linking this up to a math stations linking party. When I do math stations in my classroom I always have one station at the promethean board. This keeps their attention every time.