I was very studious and academic but had major behavioural issues at infants, junior school, and to a much lesser extent, the first couple of years of secondary, then had what I guess you might call a mental breakdown at 15, tho in retrospect you could see it as the first signs of my bipolar disorder.
My junior school wasn't quite sure what to do with a tiny, speccy little girl who was their highest academic achiever by a fair distance, from a stable, supportive background, but who also had a seemingly inexplicable ability to do certain very easy tasks which was surely down to defiance (it wasn't, I genuinely couldn't), would sometimes refuse to do things the way pupils were expected to do them, was opinionated and fairly… "articulate" about those opinions, and most importantly, regularly got in fairly serious physical fights, right from when first starting at infants.
I was unofficially expelled at 10, for violence, and sent to an academically selective private school, as it was thought a more academically challenging environment would help. Actually, along with getting older, it did help, and by 12 or 13 I didn't cause any real management issues at all, but I think it was less to do with me not being "bored" as had been suggested, and more to do with the stricter environment, focussed more heavily on something I knew how to do i.e. schoolwork.
I did really well academically, such that by 14 or 15 I was putting myself under a lot of pressure to be getting the highest possible marks in everything, all the time. I wasn't sleeping much and got quite stressed and depressed, so I was put on antidepressants, went really quite a lot more nuts on them, started to self-harm, became suicidal, and ended up in an abusive, restraint-happy adolescent psychiatric unit, which left me with some serious mental damage. And which they then kicked me out of after three months, because I was a bad influence 
Went back to my local school for the last few months, managed to scrape my 5 A*–Cs while coping using the butane/aerosol habit I'd picked up in hospital (alongside a drastically-escalated level of self-harming — both were rife in the unit, though luckily I didn't pick up heroin like a couple of the other girls), had a brief go at A Levels, ended up in an adult loony bin, dropped out, moved out of home, had another brief go at A Levels, ended up in a loony bin again, dropped out again, then did fuck all for a couple of decades, before signing up for an Access course mid-manic episode, which ended up in me going to university and getting a degree. Now I'm doing fuck all again cause I can't get a job 😅
So yeah education doesn't always go that smoothly for us I guess… 🤣