o you want to launch a collaborative math classroom, but you're not sure how or where to start? The Collaborative Math Classroom is a practical guide to starting this work, outlining exactly how teachers can launch and cultivate a collaborative, student-centered math classroom. You will find clear suggestions to help you get started and establish a structure, along with ideas of what to look for, signs to celebrate, answers to questions, and a variety of resources, all drawn from classroom experience and backed by research. The authors provide key goals for developing students' interactions with the environment, each other, and mathematics, and how teachers can plan for, launch, and develop classroom communities that help meet those goals. Creating a collaborative math classroom is engaging, ambitious, and often joyful work. The details vary from year to year, grade to grade, and classroom to classroom, but the work can happen in any classroom-including yours.