Going against what a lot of posters are staying on here. DS (now 15) was your son from year 8 to year 10. All the things you described. At least 2 detentions a day. Removed from classes regularly and known as one of the more challenging pupils.
3 years of endless consequences at home, meetings at school, conversations trying to understand why on earth he’s behaving like this. We tried everything to try and get the bottom of it but nothing had any effect. It just kept on happening. It wasn’t good for anyone. Not for him, his teachers, fellow classmates or me at home trying to deal with it.
One of his teachers called me one day and we ended up having a longer conversation than normal and she asked if I’d ever thought of getting him assessed for ADHD. She said that she’d been teaching for 30 years and can tell the difference between there being a diagnosis needed and just being challenging. I know that there’s a lot of eye rolling about ADHD and excusing bad behaviour and poor parenting etc but I kept it in the back of my mind and didn’t do anything about it for another 12 months. I just kept tearing my hair out trying to deal with the situation and nothing worked.
I then borrowed some money off my DM and got him assessed. He was diagnosed with ADHD and started on medication 6 weeks ago.
I can’t begin to describe the difference in him at school. He hasn’t had one detention (yet) since he’s been back at school. I am now getting phone calls home about how well he’s doing. He’s getting multiple merits a day and he’s doing his homework every night with it too much nagging. I have spoke to him quite a lot about what the difference is now and (not a massive talker admittedly) he says that for the first time ever he can focus and concentrate at school.. and that he’s enjoying school now. It’s early days but I had to post as it’s been so transformative for him.
Back to yours and other posters’ points - it’s not within the school’s remit to say if anyone has ADHD or not. I feel strongly about this as I went through similar with my DD (now 18) when she struggled in school. Endless phone calls home about her talking and lack of focus in school. I had spoken to a friend who runs an ADHD charity and she had said that it sounded like DD had ADHD. I asked the school and they were absolutely adamant it wasn’t. They don’t have the time, qualifications or resources to say whether a pupil does or doesn’t. In fact I would say that most state schools don’t have the resources to do more pupil passports, make reasonable adjustments, apply for EHCPs so it’s ‘easier’ (I know it’s not easy but figuratively speaking) to just deal with the behaviour in the moment.
My DD was later diagnosed with autism and ADHD after a long time with CAMHS and lots of MH problems.
If you have the funds then I would seek a diagnosis even just to try and get the bottom of it / rule it out yourself. Don’t take what the school day at face value.