I compiled all of my "Ways to Make" Sorting Centers into one big MEGA PACK! 6 sheets--Ways to Make 10, 12, 15, 18, 20 and 25 for a discounted price! You can also purchase each center individually. For these centers, students sort the cards under =10 (for example) or ≠10. They involve very little teacher prep--just copy onto cardstock, laminate, cut and you have a center that can last for several school years! I made several copies so that I have enough for students to work on with a partner! The "Ways to Make" Worksheets are a great follow-up to the centers, which are available in my TpT store individually, as well as a bundle pack that contains 14 sheets (10, 12, 15, 18, 20, 25, 30, 40, 50, 100, 200, 300, 400, 500) for $7! You can check out one for FREE at my store! :) Thanks and Enjoy!