when my son was about 6 he used to come home from school and stamp up the stairs, scream, shout slam doors, really angry, infact sometimes we hadnt even got in the door when he used to slap me. at school i was told by the teachers he was a very good, quiet child polite etc,so i came to the conclusion that by the time he got home this pent up frustration during the day came out with me his mum at night,so i let him scream, and wale for a good hour or two untill he felt better, i kept calm and my mouth shut,after afew months things improved as his confidence grew,i think he wanted someone to listen but not challenge him,