You should not yell at your children.
Mary's daughter was doing the dishes when she dropped one on the floor and broke it.
Mary wants her daughter to be more careful.
Mary talks to her daughter and tells her that broken glass can be dangerous.
Mary starts to yell at her daughter telling her that the dishes were expensive.
Mary's daughter continues to do the dishes, but never breaks a plate again.
Mary's daughter starts to cry and doesn't want to help with the chores anymore.