First, you have to know what triggers the child's hyperactivity. Is the child really hyperactive or just really very active. Generally, you should give the child less sugar like chocolates, cakes, ice cream and candies. Give the child/children activities that are physically tiring like basketball, swimming, running, biking, martial arts and other activities. After that, you can ask the child to do homework and other work. Assumably, the child is more calm after that. If still the child is hyperactive, maybe you should consult a developmental pediatrician or behaviorist to learn more about them or maybe they can give some medicines for the child.