"Leaders of Their Own Learning" offers a new way of thinking about assessment based on the celebrated work of EL Education schools across the country. Student-Engaged Assessment is not a single practice but an approach to teaching and learning that equips and compels students to understand goals for their learning and growth, track their progress toward those goals, and take responsibility for reaching them. This requires a set of interrelated strategies and structures and a whole-school culture in which students are given the respect and responsibility to be meaningfully engaged in their own learning. The book: (1) includes everything teachers and school leaders need to implement a successful Student-Engaged Assessment system in their schools; (2) outlines the practices that will engage students in making academic progress, improve achievement, and involve families and communities in the life of the school; and (3) Describes each of the book's eight key practices, gives advice on how to begin, and explains what teachers and school leaders need to put into practice in their own classrooms. "Leaders of Their Own Learning" shows educators how to ignite the capacity of students to take responsibility for their own learning, meet Common Core and state standards, and reach higher levels of achievement. [This book was co-authored by EL Education. For "The Leaders of Their Own Learning Companion: New Tools and Tips for Tackling the Common Challenges of Student-Engaged Assessment," see ED598811.]