The ever popular "I Have, Who Has?" game. There are 6 complete games included in this product. Including Up to 25, Up to 50, Up to 100, Up to 120, Up to 500, and up to 1,000.
There are 24 cards total. I like to give each student one card then give the students who need a challenge an extra card, but if you have a larger class, you may not need many students using two cards.