I could do with a fresh perspective on this.
DS - 14 - was always quiet, well behaved and diligent at school until about a year ago. He is not naturally super academic but he would always engage at school and would make an effort.
About a year ago he started to become disruptive in school - generally lower level disruption, talking, acting up, trying to be funny. He is in near daily detentions and seems to have lost any interest in learning most of the topics in school.
I've met with the school multiple times, and although we've looked for reasons behind his behaviour there doesn't appear to be any real root cause. I also do my best to keep speaking with him, but he's never clear on why he's disruptive other than saying he was bored, or he wanted to be funny.
He shows no willingness to learn most topics (he is interested in the few and does retain the knowledge of those subjects). I've tried additional tutoring on one subject with a tutor he really liked, but despite liking the teacher he wouldn't even attempt the work.
He doesn't have a strong social life, has stopped all in person extra-curricular activities and has become more detached from his old friendship groups over the last year. There's no drugs or similar involved as far as I can tell (he tends not to go out much). He does play online with real and remote friends.
I occasionally see glimpses of the smart, funny, endearing son that I love (eg if we're out somewhere without others).
I know teenagers often go through rebellious phases but I am very worried he will really struggle to come back from more or less refusing to learn for a year.
Any suggestions on how on earth can I get him re-engaged with education and life in general.