See how simple objects like tiles, stickers, rubber stamps, dice, and graph paper help teach students important concepts in number theory: factors, primes, composites, and square numbers...not to mention the great reinforcement of multiplication facts. Grades 2 - 5
CCSS: 2.OA.4, 2.NBT.2, 2.NBT.5, 2.G.2, 3.OA.1, 3.OA.3, 3.OA.4, 3.OA.5, 3.OA.7, 3.OA.9, 3.MD.5, 3.MD.6, 3.MD.7, 4.OA.1, 4.OA.2, 4.OA.4, 4.MD.3