You can buy bingo cards to match the interactive boards at their teacher pay teacher store.http://www.teacherspayteachers.com/Store/Teachers-Classmate
You could also make your own bingo cards to use with the website at Bingo Baker.
Since I was using it "on the fly" today, I used the bingo cards I had. Then I gave them wild cards every so often to fill in numbers that the website was not using. This also gave them the chance to strategize which is a great math skill.
Check them out and you will not look at bingo the same again!!