Good at: Maths (up to GCSE)
Bad at: Maths (A-Level and onwards)
I was a reasonably good student in most subjects without really excelling at much - a B grade right across the board in most things, with the occasional A or C if I was lucky/unlucky in a particular exam - but Maths was the exception.
I'd always been a kid who loved numbers from a really young age and I just couldn't get enough of the subject; apparently I was doing tests meant for 12 year olds when I was just 6. Got up to GCSE level without really having to try and aced the exam in about an hour when it was scheduled to last three, and got the "A" I was expected to (they brought in A*'s the next year and my teacher said that I'd have easily got one of those). Because of this I was then encouraged to take Maths at A Level and it was at that point that I came a cropper.
I have two trains of thought as to why I struggled so much at A Level. One is because I'd been resting on my laurels for so long and had never really had to work at the subject and now it was harder, I couldn't get by on natural talent any more without the equivalent amount of hard work at the same time, which I'll admit is not my strong suit (I can be a lazy bugger at times!)
The other is because it suddenly stopped being a numbers game (e.g. what I loved) - everything was now letters and theory. Algebra is easy when at the end of the equation it boiled down to an answer that had meaning to me, e.g. x=2.72375, but now it was all differentiate this, and logarithms that and square rooting negative numbers (WTF?) and it just didn't make any sense to me any longer as I couldn't see what the end result was supposed to be, if there was one at all - we were just doing things for the sake of doing them. I found I spent more time in class asking Why?, when I was supposed to be asking How?
It probably didn't help that I'd been placed in the top stream because of my previous success and with hindsight I should have asked to be dropped down a level as going a tad slower might have helped me out a little. But the trouble was there were bits that I was still doing well at and those gave me just enough encouragement to stay where I was - my syllabus was Pure & Stats (the other option at our school being Pure & Applied) and as the Stats bit was still all number based, I was flying through those parts with good marks, especially compared to some other kids in the top stream who could crush the Pure Maths parts and yet were struggling with Stats. In the end, I got an E for my A Level Maths - while I don't know the exact grade breakdown, based on my mock exams taken about 3 months before where I got a B in Stats and a U in Pure which also averaged out to an E overall, so I've got to assume it was similar in the final exam.