ADDITION STRATEGIES MAT | adding within 1-20, intervention, math small group, grades 1-2This is an easy math support printable. This outlines different addition strategoes students can use to solve addition problems within 1-20. This is perfect for grades 1 ans 2. I would print these mats out (use in a small group/intervention/ or put in every child's math folder) and then make sure to either laminate or put in a sheet protector so that students can reuse for as many problems that they need! Thi