I got an "Inernational Baccalaureate" education. There was a time when I could locate every country in the world on the map. Many miles and years have worn down much of my memory, and Africa has changed a lot in the decade I've been out of high school.
Those people who went to the standard high school could locate many of the countries in the world.
Those who went to the honors high school could locate none. "Honors" was a twisted system, requiring the maintenance of a 3.5 GPA, and they did everything they could to ensure that you maintained that by giving obscenely easy classes. When I had to draw (from hand, from memory) a map of every nation in Africa, and memorize their names in English and in Spanish as well as their colonial names and who controlled them, they had to color in every country with a different pattern. (I'm serious about both assignments.)
Most of what I learned in the IB program was, however, not slanted towards Europe. Most of it was South America, Africa, Asia, the Middle East, and Oceania (mostly the first three, with more of the Middle East than Oceania). I came in through EU3, and I learned where a lot of ancient tiny German states were, thanks to EU3. Then came CK2, when I first kinda understood the rudiments of feudal mechanics. It had always been kind of a vague idea in my head, but now I know just how much the King WAS his country back in the day.
The other thing CK2 helped me learn was just why the reformation happened when it did and not earlier. The Catholic church in CK2 is doubtless corrupt and banal, but their power is somewhat limited, whereas in EU4, the power of the Papacy is immense. And the "excesses of the Catholic Kings" are fairly dire too.
My education on the reformation had, before I started playing EU, consisted of a single video-tape we watched in my 7th Grade history class that was produced by the Catholic Church and portrated Martin Luther (the founder of my religion; I'm a Lutheran) as a demon-worshipping baby-eating monstrosity. I mean, it wasn't that exactly, but when every single monlogue that the actor playing Luther had came in front of flames and was overlaid with scenes of peasants murdering each other.... Plus the deep, evil voice too.... Luther hated the Jews, I don't deny that, (we tend to gloss over that part in Sunday School) but he wasn't evil. He's not going to be sainted by the Catholic Church any time soon though.