This timely resource for teachers, leaders, and policymakers provides breakthrough insights into how to improve students' well-being in schools. Even before the COVID-19 pandemic, students' well-being was an increasingly prominent concern among educators, as issues related to mental health, global crises, and social media became impossible to ignore. But what, exactly, is well-being? What does it look like, why is it so important, and what can school systems do to promote it? How does it relate to student achievement and social and emotional learning? World-renowned education experts answer these questions and more in this in-depth exploration of the underlying ideas and research findings related to well-being, coupled with examples of policies and implementations from around the globe. The authors make the case for putting well-being ahead of other priorities, such as scores on high-stakes assessments, and explain the three powerful forces that educators can leverage to set up effective well-being policy and practice: prosperity for all, ethical technology use, and restorative nature. Inspiring, thoughtful, and provocative, this book offers hope in a time of unprecedented challenges. Looking within and beyond the classroom, it charts a path toward a lofty but achievable goal: improved well-being not only for students but also for society as a whole.