I adapted "Be a Prime Number Hunter" game from Education.com for the Smartboard, and my students really loved it. I think they just loved being able to use the Smartboard in a small group on their own, but it was a nice alternative to a traditional math station. Feel free to use the "game" if you are teaching prime and composite numbers. It was GREAT to hear the students debating about why certain numbers are or are not prime!
Prime Number Game