Describes the normal course of the development of self-control in young children, and Montessori techniques for teaching self-control, especially for children with disabilities, including structure, imitation, direct teaching, work, independence, and specific correction. Presents effective discipline techniques in harmony with Montessori philosophy, including isolation, repetition, privilege removal, behavior modification, and reminders. Delineates aspects of the Montessori classroom helpful for children who have difficulty with learning or controlling their behavior. (KB)