These are labels to use for Otter Creek rocket math practice. Power towers are sets of small cups with math facts written on the bottoms. The students can build towers with the cups, but they must say the math fact on each cup before it goes on the tower. You can keep your power tower cups in Pringles cans or plastic containers designed to hold sleeves of crackers. There are set up to put several sets of levels in each container. This is only for addition, but I will get around to adding subtraction, multiplication, and division. Enjoy!