We believe that Collaborative Classrooms are active, engaging places where instruction centers on student thinking. Collaborative Classrooms rely on teachers who are skilled facilitators and use evidence-based practices to support student development. Lessons in these classrooms provide rich opportunities for students to work together, grow ideas, revise their thinking, and construct meaning. These resources highlight key facilitation techniques and other ways to create space for students to struggle and learn, so that they are the ones tired at the end of the day.