Edit: thank you for all the replies. I really appreciate the perspective so feel free to keep replying, but I see my error in focusing too much on punishment. We think he's worried about making friends, so we're gonna sit down and talk to him tonight, hear his side, establish some ground rules and do our best to help him make friends without making a fuss at school. Thank you all for your perspective, it really helps.
Okay so last year, I took guardianship of my brother and sister during a stressful and bad scenario we were all in. My brother started having problems at school around this time. It got really bad, but towards the middle of the school year his behavior started improving. Towards the end of the year though (after we got into a stable living situation) it got exponentially worse.
He had an incident where he almost got expelled, he was trying to be a "class clown" and was making comments about "beating his meat" and whatnot. The teacher tried to deal with it, but when the teacher tried getting me on the phone, he threatened to "fuck him up" if the teacher told on him to me. A lot more went on but that was the worst of it.
Anyways, he was grounded for quite some time but it didn't seem to matter. The second to last day of school he got in a fist fight and was suspended for the last day.
So then, we kept him grounded ALL summer, and he just started at a new school on tuesday. He was so excited to get his Xbox back, but he did not keep it long.
The first day at school we didn't hear of any problems. The second day we thought went fine, but we missed a text from the teacher that he was putting his hands on students and not listening, didn't know about that until yesterday, but yesterday we got a call from the school that he's telling students "the teacher picked me last just to piss me off" and yelled "fuck" really loud when the teacher was talking to him.
So no Xbox. We spent a good few hours scolding him, and the rest of the time he spent writing an apology letter and reading. He was super upset and bored all day and we really expected him to at least not cuss at school today, but alas, I got an email from the school that he's disrupting kids in the library and cussing yet again.
I'm at my wits end. This is a daily occurrence. He respects us and behaves himself at home but then he goes to school and it's like he's a completely different kid. I don't know how to correct his behavior. I've genuinely looked back into whipping him, but the science says that isn't really effective. I'm thinking about calling the non-emergency number and seeing if the cops will do a 'scared straight' type of deal with him.
He's been in therapy since last year. He has so many people working with him and trying to help him succeed, but it's like he gets to school and takes all his pent-up anger out on everyone there.
If he keeps this up he will certainly get expelled this year, so I'm trying to find a way to get him off this path, but nothing seems to work and I really don't know what to do...