My school doesn't make us do half yearly exams until we hit Year 12 (then again, my school isn't your conventional high school) - only had to take an exam in General Maths, which I pretty much aced. 52 out of 68, or 82%.
My half-yearly report, on the other hand...
English Advanced: 52/100, 19/19
Ancient History: 82/100, 1/14
Senior Science: 60/100, 11/22
General Maths: 81/100, 10/43
Legal Studies: no result, might need to chase up my teacher about that next Tuesday
Drama: 80/100, 2/20
This is out of a whole grade of around 60-70 - my school has approximately 350 students, most of which is made up of Year 10 students.
I'm quite pleased with those marks, aside from English which I really need to work on. It's a far cry from my first go-through of Year 11, where I routinely failed most of my subjects - hard to believe I even managed to get my HSC, really...