I think the fact that American education doesn't teach a lot of geography about other countries in general has a lot to do with the size of America.

I mean, for example, I'm Dutch.
Our history and geography classes are for maybe 30% about our country, and the rest is about other countries. That has a lot to do with the fact that we're an incredibly small nation to usual standards.
We're eight times smaller than most US states, which sort of makes it impossible to spend huge amounts of time on topography, when there isn't all that much to know.
So the time we can't spend on learning stuff about our country, is filled in with stuff about neighbouring countries and the dominant countries in history, like Britain and France.

Same goes for History, Holland hasn't really ever had power until quite late in history, around the 17th century, when trade and colonisation was the way to go :v
This, again, means that most of our time is spent on learning things about bigger countries with more impact on the world's history, languages and other things that are generally not of huge importance, but just great to know.