Hi Sonya, I am also the CL on the ADHD forum -
http://www.medhelp.org/forums/ADD---ADHD/show/175
Why don't you start a new post over there? This behavior (believe it or not) is something that I have seen posted many, many times. It is so sad that you have not gotten the help that you need.
I know of some very good links that will help you with discipline, but more importantly will help you understand why he is doing what he is doing.
There are definite things that can help him in school - like a 504 plan.
Have you tried any medication and if so what?
I think that I can help, but do try and post to the site mentioned above so that you don't get lost in the 130 posts here. Really glad I decided to check this out.