I don't know what to do, my son just turned 4 and for the last 2 months his behavior has worsened tremendously. He started by using naughty words that he claims he learn from one kid in school. I asked the teacher to keep him away from that kid, and constantly spoke to him regarding naughty words. Then the last 2 weeks he has been throwing things at everyone including me, spilling every thing , saying bad words, and he seems totally impossible. I talk to him at night and he promises he will behave and next day no change. He also has decided he hate school.... Any advise...