Students are given the challenge to collect crystals by subtracting large numbers. Students receive one crystal for solving problems with 3 digit numbers. Students receive 2 crystals for solving problems with 5 digit numbers. The template is set as a goal of collecting 20, however you can easily change this by simply changing the number (max is 30). Can be used as homework, review, or even as an assessment! Can easily be differentiated (change the collection goal)! Digital learning friendly! Answer Key included.