In this fun center activity, students will sort addition and subtraction facts according to whether the sum or difference is true or false! Monthly themes are available in both black and white and color versions. I used these as a pocket chart center with my 2nd graders and they loved every minuted of it! August through January sorts focus on addition facts +0 to +9 and February through May sorts focus on subtraction facts -0 to -9. June includes a mixed addition and subtraction fact sort. Includes recording sheet. Save $5 if you purchase the year-round bundle!