hi there,
i could be disruptive in class at times. depends on what age group you re talking about though i guess. with me it was when i was very young and just didnt know better (up to 7 years old) and after i turned about 16. when i was older i would talk to the person next to me straight through three different classes. two of them because they were laughably easy and the other because i hated it so i paid no attention and had no idea what was going on. in the class i hated it worked out ok because it was chemistry so when we were doing experiments etc there was a lot of talking anyway. my teacher just let me get test results of 12% etc and pretty much ignored me. the person i sat beside was getting 98% in tests so i guess the teacher didnt think i was that disruptive!
in the two easy classes i really was disturbing the person beside me which i feel quite bad about now. one of the teachers took immediate offence, moved me, yelled at me, refused to correct my homework, constantly criticised me. i stone walled her in response and eventually refused to go to the class. on the other hand the other teacher didnt interfere at all. she just let me talk on. i disturbed the person next to me but then she would always turn to me to help her with her homework if she got lost because she was paying attention to me instead of the class. eventually the teacher approached me and asked if i would like to work on more advanced stuff. i was thrilled because it really gave me a confidence boost. and i had been being disruptive because those classes were the only chance i had to socialise for various reasons. in the end i didnt disturb anyone in that class except me and the girl next to me. she did fine in the exams because i helped her and i walked through them because of the extra personal attention i got from the teacher and the extra work. it all worked out.
just thought i would give you my experience in case it might help. i really hope you find a way to help this child and integrate him in the class as well.
good luck.
biiv