While there are lots of books with information on why and how to differentiate instruction, here at last is a book that gets to the heart of why some efforts to differentiate flop while others lead to sweeping, positive results. When it's your job to support differentiated instruction in a single school or systemwide, you need the guidance from these leading experts who've distilled what they've learned in helping successful schools through the change process, including: (1) Fifteen common misconceptions about differentiation; (2) Eight nonnegotiables that are essential to the implementation of differentiated instruction; (3) Ten factors that contribute to failure to change classroom practice; (4) Eight leadership lessons for accomplishing the change process; (5) Forms, survey, and checklists for monitoring and evaluating the change toward differentiation; and (6) Ten characteristics of staff development practices that support differentiated instruction. Bad advice and common pitfalls could doom efforts to differentiate instruction, however this practical guide with real-world advice straight from successful schools could assist in producing positive outcomes.