How many lies was I taught in school?

I grew up in Brazil, at the start of educational decline. I was part of the last generation to have a subject on civility at least in public schools. But even then, there is so much incorrect information that was fed to us in and out of school. Sure, religion is a big one. But we were not taught Philosophy, and the little we learned was wrong. We learned everything backwards on communism, the nazi, liberalism and even democracy.

I ended up going to college and graduated on Computer Science, but even then all I know on the field, after 15 years, was not taught in college -- to the point that I define my job in a completely different field and work a lot better because of it.

I am not saying school was useless. I would not be able to do the things I do without what I learned at school. But I was fed truth and lie simultaneously and without me or anyone around having the right tools to tell them apart. And I don't see this getting any better. Raising two kids, now 8 and 2 years old, this concerns me a lot and I don't know how to fix it or even how many people realize the problem exists worldwide.