The companion book to the updated edition of the best-selling Differentiated Instructional Strategies: One Size Doesn't Fit All, this revised edition focuses on step-by-step training activities for job-embedded professional development in differentiated instruction. THis workshop-friendly resource offers guidelines for small study groups or larger staff development meetings and includes: research-based approaches for responding to concerns about change and for providing individualized support and mentoring; suggestions for coaching, observation, supervision, and evaluation of staff members' use of differentiated instructional practices; and implementation and evaluation tools to measure schoolwide progress. Covering the basic elements of differentiated instruction, this book demonstrates how administrators and staff developers can help teachers develop the capacity for change and improve the quality of instruction, curriculum, and assessment.