This is a great unit to reinforce the concept of addition and subtraction to 12 to first graders. The pack includes essential posters, five printables, and four centers. If you are using Envision Math these centers support Topic 4.
Common Core Standards-1.OA.1 1.OA.3 1.OA.4 1.OA.5 1.OA.6
1 less than
Under The Sea Addition and Subtraction
Sea Stars Domino Sets
Addition and Subtraction Puzzles
Envision Common Core, Addition, Math Facts, Centers, Posters, Printables, Common Core