Oh my god, I remember in my high school, had a sexist food teacher. Guys weren't allowed to sit at the back, were judged harsher, and she just generally treated us badly. It was funny because nobody gave a shit and kept ignoring the bullshit sexism. Didn't realise it was such a big issue (women being extremely sexist towards men while still whinging about how men are sexist to women) until a few weeks ago.