This essential guide helps teachers refine their approach to fundamental challenges in the classroom. Based on research from cognitive science and formative assessment, it ensures teachers can offer all students the support and challenge they need and can do so sustainably. Written by an experienced teacher and teacher educator, the book balances evidence-informed principles and practical suggestions. It contains: detailed exploration of six core problems that all teachers face in planning lessons, assessing learning and responding to students, Effective practical strategies to address each of these problems across a range of subjects, Useful examples of each strategy in practice and accounts from teachers already using these approaches, Checklists to apply each principle successfully and advice tailored to teachers with specific responsibilities. This innovative book is a valuable resource for new and experienced teachers alike who wish to become more responsive teachers. It offers the evidence, practical strategies and supportive advice needed to make sustainable, worthwhile changes.