After decades spent pondering basic questions about adopting or implementing ‘best practices’ in education, educators have assembled a canon of evidence-based strategies and programs that should consistently produce good outcomes. So why is the work of educating students still such challenging work for so many? The best, most skilled educators adapt programs every day to meet the changing needs of their students. One size does not fit all, and one textbook, teaching strategy, or program will never meet the needs of all teachers and learners. Adaptive Implementation: Navigating the School Improvement Landscape focuses on how practitioners and researchers together continue to improve their craft by systematically collecting data on adaptations, testing them out, and figuring out what works. We provide a framework for building an adaptive implementation process in education, with tools and templates for practitioners to use. In the end, we hope that this book sparks a dialogue among educators as they continue to create adaptive implementation processes that work for their context.