I combined ALL of my WAYS TO MAKE Activity Worksheets into one MEGA BUNDLE PACK! 19 Worksheets that promote number sense and math fact mastery for $7.00! That is OVER half price off the cost of each sheet sold separately at $1.00 each. I use these about once a week for morning work as math and number sense review and practice. The students work out each fact in the box and color it the appropriate color if it does make 10 (for example) and if it doesn't, they X out the box. I also have sorting centers made for 10, 12, 15, 18, 20 and 25. I also have the centers available in a discounted bundle pack for $4. The worksheets would be a great follow-up to the centers. You can also purchase each Ways to Make worksheet and center individually for $1 each. Thank you and Enjoy!