well.. i got an A-C-E

on my exams in grade 12th... the others were marks... Anyhow

i did even get into a college.. but... im not sure what to do next.. cauz.... im just sleeping in the lessons there.... But really, from my own experience... Attend school

do not fail.... get on the teachers good side... I got on one of my teachers bad side... And in the end.. the only year.. when there was a (10grade system) mark below 4 @ the end of the year. was 12th grade xD I got a 3 in history... not because im stupid... (well it is... kinda..) but because, the teacher didnt allow me to write the stuff, i hadnt written... (and there were only like 4grades that year.. in that subject..)
Just attend.. study... IMHO.. if you just go to school, and do listen a little.. its kinda hard to fail.... (5-9th grade for sure)