american high schools aren't proper schools in the sense that they educate their students for life ahead, they're day care. they encourage rote memorization and regurgitation of data instead of critical thinking and processing of the world around us.While this is anecdotally common, I can't say it's universal.
Where I went to school we were taught to think. I didn't appreciate it fully at the time, but I do now.
We were taught that knowing things is great, but it's equially important to know why things are the way they are. To this end, we had a lot of classes in history, geography, philosophy (a little) and civics.
Even in elementary school, we went through endless drills called "Fact or opinion" where we were presented with everything from single sentences to headlines to paragraphs, and learned all about weasel words and hidden meanings in the English language. At the time I hated it, and it was one of many things I never thought I'd ever need as an adult.
Today the schools need to teach that more than ever, but I doubt any still do. Even the ones I went to.