Well my middle school/junior high(or whats the equivalent in finland) grades were(on scale of 4=fail and 10=best):
Behavior - 8
Finnish - 6
Swedish - 6
English - 8
This pagan thing for those who doesent belong to church where we studied different religions, philosophies etc - 8
History - 7
Math - 7 (+ optional course 7)
Chemistry - 7
Physics - 7 (+ optional course 8)
Biology - 6 (+ optional course 7)
Geography - 6
Music - 7 (+ optional course 8)
Visual arts - 8 (+ optional course 9)
Hand crafts - 7 (+ optional course project work thing 9)
Cooking and some other home education stuff - 7 (+ optional course 7)
Physical education/training - 7
IT - 8
Philosophy - Passed, they didnt give grade for this
I dont have no idea how to translate this one, but basically teaching about how markets work and teaches about managing your own business etc - 9
Basically i didnt give a fuck and those numbers are pretty much what i got without reading much at all or doing any home work and trying to get away of nearly all things that we were required to do in school. So the numbers are pretty much about how much im interested about the topic, i didnt have to struggle at all, because i didnt care enough

. I happened to have my graduation paper next to me when i saw the topic

The most problematic thing for me in general is to memorize things that i dont really understand(i need to have understanding to remember something, and then i remember the understanding of the thing rather than specific thing i should remember), especially if i dont care about them either.