As someone who is legally certified to teach (albeit only in Kansas right now because getting a teaching license for even one extra state ain't cheap, yo), the primary issue stems from requirements. There's a strong requirement to focus on
practical* classes. This tends to lead to a heavier focus on stuff like English, Reading (though this one is going the way of the dodo), Communication Arts or Math. History is seen as something that you need to know for state tests, more than as something important to learn.
As a result, you're going to see nothing more than the basics at lower levels. American history is a large part, and that includes native history. World History tends to get glossed over a lot, though it depends on schools. The middle school I finished my student teaching at covered ancient Greece, Ancient China and ancient India, along with some modern geography. None of it in huge detail, since it was just one semester for those, but still. After that it went into more modern stuff.
By contrast, the first school I student taught at had a year for
geography, after the students already took a year of that in middle school. They only took World History after that. There were probably a dozen science classes up for offer, but there was only one history elective (World War 2, limited to Seniors). The school I
graduated from back in the day had a focus on American/World History and Government both covered under social studies, with a couple electives for history (Modern Warfare, Ancient History). And as awesome as having an ex-Marine sniper teach the modern warfare class (you better believe no one misbehaved in that one
) it wasn't much.
It's just what the American education system is focused on.
But yes, drifting off topic now. I could probably do a whole lecture on this, but that would be for a different thread (something in the History subforum, most likely)
*as for practical classes, I would dispute the classification. The average person isn't going to need calculus in their day to day life any more than they need to know how Hannibal crossed the Alps.
That is
probably the fact I'm absolute
garbage at math speaking, though.