Book excerpt: 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, t.