A colleague just told me that geography is not an obligatory course in American high schools and hasn't been for two generations. I've been telling her how students find it next to impossible to name the countries that the US shares a border with, and she didn't seem at all surprised because, apparently, nobody ever teaches them these things. Surely, that can't be right? I'm not very familiar with how the American secondary education system works, so can anybody clarify this for me? Can you get a high school diploma in the US without having to pass geography?