The Essentials for Achieving Rigor model of instruction and corresponding series of books were developed to help teachers provide that caliber of truly rigorous instruction. This guide, developed by authors of the Essentials series, brings it all together, with valuable tips and guidance to help teachers leverage essential strategies to: Conduct standards-based planning and instruction Establish conditions for learning and criteria for successUse formative assessment data to make decisionsPractice strategies in a unified system of instructionGet a big-picture view of the Essentials model. This guide empowers educators and leaders to transform their schools into thriving, sustainable communities of practice.