This can be used as a center where partner's compete in rounds of 9 problems. If you want to take the dunk contest to the next level, a classroom bracket is provided! Over the course of a week, students can compete against each other (best of 9 dunks!!!) and move their way throught the class bracket. There are awards provided in the pack. An answer key is provided, in case students would like to "challenge" their partner's answer. This set includes a deck of 26 (a-z) problems for both addition and subtraction.