Since that class I've reached the conclusion that school is not the best way to learn concepts and materials but to learn how to work a bureaucratic organization to reach your own end goal (whether it's a job, ticket to the middle class, or simply knowledge), which in itself is a valuable skill. I think museums, seminars, and some NPR shows ended up being the best ways for me to really master the material I would've otherwise learned in school.
I think anyone who is naive enough to think that school is about anything but conformance deserves to fail. I did some courses before college and got a high grade and when I went there for my bachelor's degree, they didn't count that course towards my credit points, I had to do it again. In other words, my knowledge means jackshit at a educational institution. The only thing that matters is whether I can navigate the bureaucracy. Get that in your head.