Actually, I would imagine that today's PC schools would spend a lot of time talking about America's colonial power days. It would give them a chance to slam the US on those days they're not talking about slavery, robber barons, and the slaughter of the Indians.
What they wouldn't mention is the difference between the US as a colonial power and say, France.
NOt in my classes. They learn we are the ONLY major power in history to voluntarily relinquish its "empire;" that our practice has been to make CITIZENS not colonists of all conquered peoples; and that there is no country in the history of the planet as benign and honorable as the U.S.
That's what 100 Western Civ and Technology & War students at the University of Dayton, in my classes, learn EVERY SEMESTER. I figure in four years I get close to 1000 student contacts.