Great booklet to reinforce composing and decomposing numbers 11-20. For each page, students will show the number on ten frames, show two ways to compose the number and on way to decompose the numbers. Underneath each problem there is a section for students to write the numbers. In my classroom, we pick two colors for each problem and show how we composed the number. This booklet is great practice or it could be used as a short and quick assessment!