This printable will help your children learn...
Compose and decompose numbers from 11 to 19 into ten ones and some further ones, e.g., by using objects or drawings, and record each composition or decomposition by a drawing or equation (such as 18 = 10 + 8); understand that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones.
There is a page for numbers 11 - 19. Children must place the ten frames that make the number on each page. Next to the ten frame they will write what each 10 frame equals and then create an equation based on the 10 frame.
Laminate and this becomes a great center that can be done over and over.