Discipline and punishment are NOT the same thing. Do the first one, not the second. I know, that way is so much harder, but do it anyway. The lesson is learned much better when the consequence is both tied to the crime and fits it. As in: If homework is forgotten at school, grounded for a month is much less effective than if you create some homework for the child that evening (once again the dictionary or the Bible are great sources for this.) If they have done something mean or disrespectful, a far more effective consequence is to do something nice for both the person they harmed and a stranger (perhaps filling boxes for Operation Christmas Child, volunteering at “Feed My Starving Children”, a Food Bank, or....).