Do your students constantly use the same strategy over and over again when adding or subtracting? Do they have trouble remembering their mental math addition and subtraction facts? This resource can help them learn and remember new strategies! These 17 anchor charts and 4 notebook anchor charts are designed to help your students build their ability to add and subtract within 20 in 1.OA.C.6. Each anchor chart is 11" x 8.5" and is already in a Google Slides format. This makes it easy for it to b