Student well-being is an increasing concern among educators, as mental health, global crises, and social media became impossible to ignore. But what is well-being, 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 Andy Hargreaves and Dennis Shirley tackle these questions 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. They make the case for putting well-being ahead of other priorities and explain the three powerful forces that educators can leverage to set up effective well-being policy and practice.