My parents always said "if you want a good job, you need good grades".
Well, as an adult I can say that it's not quite the truth. I had good grades in elementary school, but in high school I got a case of getting fucking tired of school, so I had a lot of IG (That would be F for you Americans) when I graduated. Life still sorted itself out for me, though. Today I've worked for 7 years as a final layout artist in a translation bureau, and last year I was moved to our project manager department because our new owners shut down half of our graphics and design department. I'm happy with my salary (around 3000 dollars a month), and each year I get somewhere between 1-200 dollars as a raise. I'm happy with my life.
Grades matter if you want to get into university, but unlike what my parents told me, no employer even looks at your grades here. Every place I've been to, they have either just taken a quick glance, or not even bothered to open my folder where I have copies of my school grades.
How important are school grades in your country?