Everything you need for Common Core activities in two critical areas for 1 & 2nd grade. 1) Extending understanding of base-ten notation 2)Building fluency with addition and subtraction. This set contains 120 number cards, 120 hundred chart, 10 more/less mat, rectangulary array mat, number bond mat, unifix cubes, ten frames, dice to 12, greater/less than signs, equal and unequal signs, 23 task cards which allows whole classes to participate at one time. Nine blank task cards you can use to create your own task. CCSS included 2 .0A.1 - 2.OA.2 - 2.0A.3 -2.OA.4 - 2.NBT.1 - 2.NBT.2 - 2.NBT.4 - 2.NBT.5 - 2.NBT.6 - 2.NBT.7 if you have your own hundred, tens, units cubes.