This is a math center activity for an Active Board. It can also be used as a center on a computer. It is to practice composing and decomposing numbers 11-19 using ten frames. It aligns with the Common Core (K.NBT.1). Why create when it's already done for you. Look for my matching Bubbles, Bubbles, Bubbles: Compose and Decompose Numbers 11-19 Math Center Activity. You can be running 2 centers at the same time.