This bestselling book provides a research-based framework for making differentiated instruction work in the primary grades. It includes scientifically validated techniques for teaching each component of the beginning reading program. The authors describe how to use assessment to form differentiated small groups and monitor student progress, plan which skills to target and when, and implement carefully selected instructional strategies. Vivid classroom examples illustrate what differentiated instruction looks like in action in each of the primary grades. For additional helpful resources, including classroom-ready lesson plans, teachers can purchase the complementary volume, "How to Plan Differentiated Reading Instruction: Resources for Grades K-3.