This paper discussed class discipline and management of children with severely mentally handicap. The authors argued that effective teachers could manage children's learning and create a responsive environment for maximizing the potentials of children. A case study in Hong Kong special school setting was presented to illustrate the possible instructional strategies involved: including individual educational plan, behavioral modification, social acceptance, and structured learning environment. [Copyright of Hong Kong Special Education Forum is the property of Special Education Society of Hong Kong Ltd.. Full article may be available at the publisher's website: https://sites.google.com/a/seshk.org.hk/seshk-org-hk/c_publication]