They also (at the cantonal level) have disparate education systems, with classes and grade levels mismatching between neighboring cantons. Yet, if you check what typical Swiss high school students are actually leaning (say at College de Candolle in Geneva), they are learning 3–5 languages, real literary analysis, and set theory. So somehow it’s working despite not having some perfect plan handed down by central authority. Hmm.
Which are also interesting when you get certified in a trade school in one canton and then move into another one.
I remember when I used to live there, early 2000's, this was a problem, having to get an additional permit.
Incredible to see my high school mentioned here
OK, also pretty wild to just say "typical Swiss high school" without mentioning the selective system that steers people into and, overwhelmingly, away from the collèges.
The flip side of this is that you can't possibly use a canton Zurich 1st grade arithmetic exercise book in a school in canton Aargau, despite 2+2 not depending on the canton (it would if the Swiss had any choice in the matter).