The definitive classic has been updated for our times. One of the most widely researched and proven-effective education methodologies in existence, mastery learning laid the foundation for today's most promising teaching methods, providing a direct challenge to traditional approaches that have perpetuated inequities for generations of children. This timely new edition of the foremost practical guide includes: recent applications of the principles of mastery learning to distance, hybrid, and blended learning environments; updates including evidence from recent implementation efforts, the results of the most current research on mastery learning and its implications for practice; step-by-step guidance on implementation across grade levels and subject area; and supplemental, on-line chapters that unpack the development of effective formative assessments and connections between RTI and mastery learning.