Roger T. Johnson is a professor of curriculum and instruction at the University of Minnesota. He holds his doctoral degree from the University of California in Berkeley. He is the Co-Director of the Cooperative Learning Center. His public school teaching experience includes kindergarten through eighth grade instruction in self-contained classrooms, open schools, nongraded situations, cottage schools, and departmentalized (science) schools. He has consulted with schools throughout the world. He taught in the Harvard-Newton Intern Program as a master teacher. He was a curriculum developer with t...