Ilvermorny System Alternatives
Firstly, college has changed me, and I blab for ages. I also have friends who blab in majors like history / poli-sci / studies in war & peace at their military colleges.
This started as a reply to an old forum post where The Gestalt Prince noted Ilvermorny was a poor reflection of the US, but quickly spiraled out of control.
An alternative to state schools in the US could also be mirroring the establishment of the colonies, then military schools. I don't remember what post-Hogwarts education is like, but I don't imagine the states would follow all to much in the tradition of apprenticeship (although, they are still prominent in the trades; magic as a trade job, what a concept....), but formal university training in adulthood.
Rather than strategic locations like Annapolis & West Point, it could be more specialization nautical magic, aerial (probably before the No-maj Americans), and similar. The next closest thing (in my mind) would be the senior military colleges and groups of indigenous magic users. Most of the senior military colleges were founded by the same man (who hated how only the sons of the powerful and wealthy could enter West Point, only to produce officers who floundered in civilian life after service) roughly northeast to south. If magic institutions followed that lead, those schools could mirror the people: Seminole lead curricula in FL, Cajun lead in NOLA, almost certainly one in Oklahoma. Especially in a country too big to know itself on the other coast (sans-Internet), European settlers would have to learn the magic systems of American Indians to work together (or defend themselves [**** you, Andrew Jackson]) as the nation was built.
I also imagine that these European wizarding communities, if allied or integrated with Native American magic communities, might also face divisions based on native tribal politics
