1. Differentiation: An Overview -- 2. Assessment and Differentiation: A Framework for Understanding -- 3. Pre-assessment: Knowing Where Students Are as a Unit Begins -- 4. Ongoing Assessment: Knowing Where Students Are as a Unit Evolves -- 5. Summative Assessment: Measuring Student Learning at Key Points in a Unit -- 6. Assessment, Grading, and Differentiation -- 7. A Look Back and Ahead -- Appendix: Suggested Readings in Differentiated Instruction.