My problem with high school was that they relied too much on teaching things that involved using your memory.
I have a really crap memory... especially if I'm not interested in something.
So as soon as tests and exams came around, I failed every time.

However when I got to college and took the same classes where exams weren't given, I finished top of the class and ahead of time cause I could figure em out quickly and then just forget about em.

I failed music all the way through high school.
Crappy teachers who relied too much on theory and teaching the viola instead of enjoying music and playing an instrument you actually liked.