I think the procedure is, that the teacher can ask the spec ed folks to get involved, but the testing involves specialists, such as a psychologist who gets $90/hour. If tested, then the kid gets all manner of labels and other spec ed paraphernalia, eligibility for mods, and if the disability is severe enough, and you are lucky, then a separate setting. Look at it this way- after he runs through whatever you can do with him in class, you can send him to the office and clearly leave it to the administration to deal with him, and you have already indicated, in your professional judgement, what you think the problem is. You are correct in assuming that your principal wants to toss this under the rug- its going to be all paperwork, red tape, and other crap, and won't do diddly if nothing positive is going on at home. If you want to irritate your principal, press the matter. That choice is yours. As far as the drug testing, only if the kid is involved in athletics, in some states, or if they are on probation and one of the probation requirements is to stay drug free (then you get in touch with the parole officer).