My history teachers ran the gamut from neo-confederate who's class I dropped immediately and who's classroom was literally wall to wall confederate posters. I also had a based teacher (who I know now is a communist) who taught us things like guns, germs, and steel, but he added supplemental videos about how advanced the non western civilizations actually were and did point out that it was a bit reductive and shifted the well deserved blame off of the Europeans. He also shut down the "but Africans sold each other first" argument when it was brought up by explaining how Europe created power imbalances and destabilized Africa first and also explained the difference between slavery and chattel slavery and just how much worse it was. He also gave people a warning bc y'know it can be pretty traumatizing but he went into detail on just how bad things were for slaves in the US. He also put emphasis on just how recent it was. Cool dude, very much not the norm where I'm from