Hi B.D.
I don't hear anything theraputic going on in your post. If your son is not seeing a board certified child psychiatrist, a play therapist, a cognative behavioral therapist, a speech and langague therapist, and occupational therapist, a social skills class, and does not have a behavior plan that you and the school follow together, then you will want to take a big, deep breath, and move to get this into place quickly. (he may, or may not need speech and ot, but many, many do!)
Unitl you get the information you will gain from these therapies, nothing "typicical" like what you are trying, is going to help him. He must be one smart little boy, because he told you as much. He has a barrier to understanding what you are trying to do, and when kids know right from wrong, and the disconned is in the ablity to apply it and squash impulse, they really do need your help, some therapy, and understanding to learn these things. Their natural reaction is to become snotty and disrespectful and appear to be in control of being dissobedeant, because they can't explain to you why this happens, so they feel a little better if they lie and say "I want to be bad" essentialy, because they can't fix it themselves and at least they can fool themselves into thinking that they did something deliberately. If you don't have the tools to be good even though you know what that looks like, an imature kid will just say, "I meant to do that, what are you going to do about it?" Make no mistake, he is dying to be able to control this, and has not a clue how to do it.
If you have a medical practictioner who has not guided you to all this therapy, find a new one ASAP. Board certified child psychiatrists are the best for medical treatment (yes, meds-which are a tool that will make all that expensive therapy more effective!) and should be serving as a case manager to refer you to what he needs.
If you do not have a comprehensive evaulation of your son, call the nearest childrens hospital, and make an appointment with a Developmental Pediatrican ASAP. The report you get from a DP will be 10 to 20 pages long, and will include every single medical and theraputic professional that he may need, and will roll the entire picture of your son's condition into one comprehensive document. You need this, get it now if you don't have something like that. It will take many months to get into see one, so access as much therapy and medical treatment based on his symptoms as you can while you wait.
Do some reading. Dr's Mel Levine and Russel Barkley are the best sources for ADHD information, they both have great books that are avaliable at your library or any big book store and amazon. Get some of them, and read. They will not only explain the medical condition, but they will give you great strategies that will be helpful.
Next, go to www.wrightslaw.com because you will be needing to learn how to advocate for your son so that he does not end up in Juvie! Start reading now, and get a head start on what it is going to take for you to maintain a good relationship with your school district and work together to help him avoid this all too real outcome.
Untreated ADHD is very highly correlated with your prediction, so move on getting him the very best standard care you can get. It is the only thing that has been shown to work, so once you have accessed good medical treatment, good theraputic interventions (and A LOT of them) and good behavioral and educational strategies, then, if you want to add stuff like diet, allergy, supplements, etc, etc...go for it, but you should not make any of these a first line treatment because it has just not been shown to be effective.
It is hard, hard work for him, for you, for his therapists, for his doctors, and for his teachers that will produce resluts, and there is no night and day cure out there that will make it any easier, but it can be done. It is very hard on parents, so if you feel like you need help yourself (and the majoirty of primary care givers do!) get some! Also, contact CHADD and find a support group. NAMI offers great educational workshops for care givers, and can help you find good psyciatric care in your area if your pediatrician is less than helpful.
Good luck. (I know how you feel, and you are NOT alone!)
M.