Not getting into anything else, but I will remark that I got in trouble in 5th grade (in a US school) and a letter sent home to my parents about my bad attitude and showing of disrespect towards my teacher after she asserted that Mexico was in "South America" and that "North America" consisted exclusively of the USA and Canada. I argued with her and neither of us would back down. It was the first time I'd ever been in any kind of trouble. My parents were proud and took me out for ice cream. US public schools have some decent teachers but also some really ignorant ones.