Timely and accessible, this book critically explores the meaning and practice of teacher advocacy. Drawing from the work of teachers who advocate with and for students who are traditionally marginalized--including students of color, students with exceptionalities, students in poverty, and immigrant students--this volume investigates classroom realities like inequitable distribution of resources, student trauma, and uneven support for teachers' work from administrators. Unlike other texts on teacher activism, this book embeds activism within an existing leadership framework and strategies that teachers enact within the classroom, across the school, and in their communities. Foregrounding data in the five case studies, this book is an invaluable resource for pre-service teachers and scholars in teacher education, social justice education, and educational leadership.