Most of them, yes. Most 12 year olds from my country are taught the names of all countries in the world and where to find them on a map and the names of the capital cities.
The I guess I'm less intelligent than most of the 12 year old kids in your country, because to be honest there's more relevant things I still have yet to learn before I get around to memorizing the name, location, and capital city of all 195(?) nations in the world and keep this information updated in my mind when, for example, a regime change in Central Africa means the name of the country is now different or what was one country is now two.
I should have your middle schoolers tutor me.