I'm 20 from Australia, I Graduated High School in 2009 all C - D.
But im now studying Maths to get the Bissness course so i can get a good job. no grade levels anymore
best thing about it they dont mix students anymore. i only got D's because they compared me to the really super smart asiain nerds who are sooooooo good in school.
(fact that I can't spell but its not really that important since nobody i know can spell)
i do a course with people who are on the same stage as me and i love it because nobody EVER picks on you for being dumb or not a good speller IM TALKING AT YOU ATRL MEMBERS WHO I WANT BANNED.
I'm 17. From Australia. I'm in Year 12, which is my last year of high-school. I'm doing the HSC this year to get an ATAR, a score which admits you to university. It's so stressful. I've done pretty well throughout my whole school life, but this year is really hard because there is so much pressure and content to learn.
16 in Mexico, finishing 10th grade, I get from 10's to lower 8's on my grades, it's great but then everyone else calls me a nerd and i'm labeled for life lol ok not for life, but I am labeled
So young. I work well and I'm in the top set for every subject. 
But I'm only in high school.
