Written specifically for K-12 mathematics teachers, this resource provides the nuts and bolts of differentiation. Presented in an easy-to-implement format, this handy notebook is designed to facilitate the understanding and process of writing differentiated lessons to accommodate all readiness levels, learning styles, and interests. The lessons are based on various differentiation strategies including tiered assignments, leveled questions, concrete/representation/abstract, multiple intelligences, choices board, open-ended tasks, problem-based learning, and learning contracts. Additionally, the lessons are vertically aligned and provided at four different levels: K-2, 3-5, 6-8, and 9-12. This resource includes a variety of digital resources and is aligned College and Career Readiness Standards.