This product can be used for a quick and easy lesson or math center. The product includes twelve pages of 4-piece puzzles representing subtraction facts with differences up to twelve. If students are in younger grades, only puzzles for specific numbers can be used. Each puzzle contains four pieces, all which represent subtraction facts that equal to one number. For example, the 6 puzzle may include pieces that have the subtraction facts 10-4, 9-3, 8-2 and 6-0. The puzzles can be copied and consumed as one-time use for students, or they can be copied onto card stock and laminated to be used again and again, year after year. For more math center ideas, check out my TPT store! Enjoy!