Alright here's my little life story.. When I was 10 I used to live in venezuela [didn't know english] And there.. compared to here in the u.s. school is much harder, I used to study every night, write 3 or 4 pages every day on notebooks, had to do projects basically every week, and I'd still get good grades, then I moved to the U.S, I had to learn the language and still do my homework without knowing what the questions were, I'd spend 4 hours doing a 20 question homework, I managed to get good grades aswell, hell even one of the highest is most of my classes, nowadays that I've learnt the language, everything is too easy, I haven't studied in 4 years, I have never sat on my bed reading chapters of my textbooks, because once the teacher taught us, it was too easy for me, I started slacking off and I've dropped my grades, but then I realized this, and started paying more attention, doing all my homeworks and stuff like that, and still without studying I'm getting highest grades... I thought... fuck yeah school will be a breeze for me, but then last year I got an English teacher, she was strict, gave alot of hard homeworks and constantly made us do projects, I was on the edge of failing that class because I was used to the easy stuff, but then I actually studied things she said, I reviewed my notes, I payed more attention, I seeked for her help, and managed to pass..
tl;dr: I had an easy school life, always good grades, until a strict teacher showed up, almost failed, picked up my slack, stopped being lazy, and managed to pass