Computer society in High school

So while I was in high school, I got excited over the computer society because I thought I could learn a lot of programming stuff from them. I joined and quickly realized that that was a big mistake. They were teaching stuff that you learn from the computer classes in grammar school, eg MS Office, email clients.

I started to learn programming myself through learning online, eventually being the best student in the society. The teacher in charge chose me to teach the class next year, but it cannot be too advance as people would get bored and confused.

Why does classes have to be like this, cannot be too hard. Has to be something that clearly everyone knows. This kind of bullshit has to stop.