It turns out that America is a big place with many school districts. They are not all teaching from the same books.

It's 100% what I was taught, as I mentioned in my previous comment before even reading those. Where do you get such confidence in claims that are so incredibly wrong and so guaranteed to be easily rebutted?

There are more things in heaven and Earth, Horatio, than are dreamt of in your philosophy.

One of my high school history classes presented this view; we used A People's History of the United States as a textbook.

It’s also what I was taught in American (private) high school.

It's what we were taught when I was in school. Granted, that was 30 years ago, so it may have changed since.

The joke's on you! I was taught world history in high school and never American history.

The "American" studies class was about the Constitution, various laws, major Lobbying groups (ACLU, NAACP, FOP, NRA), how primaries work, etc. etc. American history was left to grade school.