My understanding is that no, such classes are uncommon in American high schools these days. I went to a public magnet high school in the 2000s and I can't recall any such class being offered.

As for most financial topics, I don't have much of a mind for it, so I would greatly benefit from a teacher. I need to be taught it, it's very difficult for me to teach myself finance. So I've simply erred on the side of heavily saving so at the very least I have a year or two of buffer.