Ah, high school. I remember it well. I was a young man, still a boy. Awkward and hormonal.
I did not like most school subjects, they were boring and had nothing to do with being useful in real life. Chemistry? Why did I have to learn and memorize the Periodic Table of Elements? I was not going to become a chemist. Algebra? When is the last time I needed to know, and use, algebra?
Due to disinterest and boredom, I got mostly “C’s” in high school. I did just enough work to get my high school diploma. And to get into a college.
The best thing about going to high school for me was the socialization with other students. And graduation. And girls.
What is the purpose of high school? Training your brain? Learning to use your brain? Preparing you for life? By memorizing a bunch of dates in history or a bunch of stuff you will never use again after high school? If you want to know something, look it up on the internet. You don't even need to use your brain anymore, just use the internet. The internet has replaced thinking and learning. In my day, you had to learn everything the old fashioned way - using your brain - there were no calculators, no cell phones, no internet. Today, you don't need a brain, you just need social media!
In spite of being a mediocre student (and only excelling in the few subjects I liked) as an adult, I turned out OK. Better than OK. School was not the reason I turned out OK. School didn't develop me, I developed myself. With the help of my parents. Maybe it’s more important (or equally important) that a kid learns good values from his parents than gets straight “A’s” in school and/or is an asshole for the rest of his/her life. Yes, if that kid is taught good values at home and also does well in school that's even better, a big plus. However, the ultimate goal of life is not good grades. The ultimate goal of life is happiness.