need help

My son is 6 years old, from as far as I can remember my son has been exhibiting behavioral problems at present he is in grade one there is a time when he is so nice, he helps his teacher pack up the books,etc, but like today he used a pencil and stabbed a little boy in his back, almost on a daily basis he hit the students in his class, take their pencil and throw it through the window even if. He also hits his teacher call her idiot sometimes, on regular basis he is at the door and slam the door on children and adults.

[Sandman2]

  Well, some of those things sound like what a child with ADHD would do (no filters, doing things impulsively, etc.)  This is something that your school should be able to help you with - depending on where you are.  Are you in the US or what country?
    It would probably be a good idea to read up on ADHD and see if any of the other things he does seems to fit in that category.  A good place to start is at the top of the screen
   http://www.medhelp.org/medical-information/show/2157/Attention-deficit-hyperactivity-disorder-ADHD

     Also, when is his birthday?  And you said there was a time when he was nice.  Have these problems only happened this year, or did they start in kindergarten?

[suziewas]

He has been exhibiting these problems from as far back as I can remember, Where I lived previously, we had a big yard, it was cooler and quite, he would stay on the veranda and tell anybody who was passing by  hello, he was almost two when we moved to another location it was the complete opposite. He would cry a lot, it took him a while to adjust to his new environment. When he started kindergarten at 2 plus he wasn't that bad, but as he got older it got worse, he was even suspended from kindergarten for 2 days, and later the principal told me if he does not get any better by 6 yrs I need to seek help for him. I try to tell him do not hit. He would say they keep troubling me, It no little hit, its a punch, a kick. His birthday is the 24th of july 2004. Also, he would be in class, very calm and helpful, then a member of his class would say or do something then all of a sudden he is all aggressive.

[Sandman2]

  Well, he is a little young for first grade, but probably not the youngest.  
To teach a child of this age not to hit or kick, it has to be done when he does it.  There is nothing really that you can do at home hours later.  If he hits or kicks at home, then yes.  And you can try talking to him and showing him other ways to deal with the problem, but at his age - thats hard  for him to carry over.  Basically, its up to the school.
   However, if he has ADHD, he basically has no control over his actions (at this age).  And the things that you described in your initial post do place him in this category.  Basically, ADHD is not diagnosed till a child is 6, which may be why the principal made his statement.  I would ask him what he would suggest that you do next - once you have read up on ADHD so you know what I am talking about.  best wishes.