hi DONT yell it will make him think its ok to shout and scream try talking in a deep but soft tone of voice also when he has been naughty make a naughty corner that he has to sit in till his temper calms down or the steps is another one also do a reward chart and let him know he will get something gd when hes being gd buy some stickers for it also try distracting him when hes being bad outside like (can u see any birds) it works with my three yr old hope u the best