Honestly, i think parental teaching is more important than the teaching at school when we are dealing with the manner problem as the kid only stays at school for 3 hours. Sometimes, i think we need to teach our maid not to let our kids hit others, and don;t let them think that hitting or beating is a game. My girl has been biten by boys for 3 times ( not only have the red mark but also bleeding , too), once i saw the boy bite my girl , but the boy's maid paid no attention, not even try to stop the boy. Maybe , that's the reason , the kid didn;t know what he did was wrong.