Doug Ready is a sociologist of education who teaches at Teachers College. His research examines the influence of educational policies and practices on educational equity and access. With Valarie Lee, he co-authored Schools Within Schools: Possibilities and Pitfalls of High School Reform, which warns that schools within schools can become powerful tracking devices. Recently, he penned an excellent review of the class size literature. You can listen to a podcast of his class size talk and read the report here.