I remember being taught that it was just their desire to expand to the Pacific Ocean, they believed it was their god given destiny. Big focus on that. I don't recall a lot of all of emphasis on how it impacted the natives.

every year in elementary school we watched some movies about how the pilgrims and Indians were friends and every year I would get in trouble for screaming "AND THEN THEY MURDERED THEM ALL". teachers would get mad and say that it was both sides fault. and then we hit middle school and got the full story, but teachers would both sides it. Also most of my peers one year believed that the genocide of the native Americans was good, needed to happen, and that they would do it again. then i went to a super libby highschool and learned even more.

My school rushed all the events of US history, "manifest destiny" was no exception and was merely a brief footnote, though the trail of tears was mentioned.

I learned Christopher Columbus would chop the hands off of indians that didn't follow orders, and we wiped out 95% plus of their population

But I went to school in California. Unfortunately, other states can teach their version of history

I was taught in Jersey and Florida during the 80's and then 90"s, and manifest destiny was taught as a good thing. Anything resembling truth I got out schooling came from subversive teachers, not the official school curriculum. It wasn't till I read Zinn and Lowen that I learned how badly I was lied to.