The document discusses several pioneers in classroom management theory and their approaches. B.F. Skinner believed in behavior modification through reinforcement rather than punishment. William Glasser developed choice theory which focuses on meeting student's basic psychological needs. Jacob Kounin emphasized lesson management and preventing misbehavior through organization and awareness. Rudolph Dreikurs believed misbehavior stems from unmet belonging needs and advocated for democratic classrooms. Lee and Marlene Canter proposed assertive discipline with clear rules and consequences. Alfie Kohn argued against rewards/punishments and favored respect, choice and community in learning.