The five-year old lives in the here and now, and doesn't comprehend the idea of long-term consequences. He has difficulty seeing a point of view that is different from his own and this can make him seem stubborn and argumentative. But, he is generally cooperative and helpful, wanting to please his parents and be good. He may come home from kindergarten talking about a child who is bad. This is a good time to help him recognize what happens when someone behaves badly and to praise him for his good behavior.
Because of five's here and now mindset, consequences for misbehavior and non-compliance should be immediate and brief. Don't expect that he'll learn his lesson the first, or even the tenth, time he receives a consequence. He hasn't yet learned self-control; and so, discipline this year involves baby steps, not giant leaps. Don't give up and don't get frustrated; just keep on giving consequences for misbehavior consistently with the attitude that he has the desire to be good, but is still learning. Distinguishes right from wrong, honest from dishonest, but does not recognize intent.