Some students think the high school is the most important thing in the world, and they usually think that if you fail something, you're nothing in life, but, in my opinion, it isn't so relevant.
Firstly, high marks just help you in the life, but they don't decide if you're a good person or not, and from my point of view, that's the most important thing.
Secondly, not everybody can have high marks. Maybe you've studied a lot, and then, you take the exam and you fail. Some teachers think that pupils who get low marks aren't intelligent, and anorher ones just think that they haven't studied enough.
In conclusion, I think we should take care about our studies and our knowledge, not if our marks are perfect or not.