My 5 1/2 year old son has always been very well behaved at school.  He is in a class that went 1/2 days for the first half of the year and this week has switched to full days.  He says he loves school, he is very smart and his teacher is wonderful.  On Wednesday he had a fit at the end of the day when his teacher told him to put on his mittens.  He told her he was going to pour 2 gals of paint on her and break into school and kill her and hurt her.  While she was telling me this at the end of the day he ran into her pushing her.  We went home and talked about the rules of wearing your mittens home and that's her job.  We also talked about yelling at a teacher and what you can and cannot do when you are mad.  He wrote an apology letter to her, we took away a toy to give to charity and talked about having a better day the next day.  Thursday, he had a good day until the last hour when he blew up again.  This time he was working with a partner and when the boy was writing the wrong word my son screamed at him and then hit him in the back while holding a pencil.  The child screamed and cried and the teacher said it didn't bother my son at all.  He was VERY sorry when he had to go talk to the principal and when he was in trouble.  I'm sick over this.  We don't hit anyone in our house, he doesn't watch violent TV (only playhouse disney & pbs kids - he is even scared of most kids movies Toy Story, Lion King etc.)  He doens't play with older children where he might learn behavior like this.  I know he is immature for his age.  What can I do?  Do you think we need counseling?  Help!