Just another data point: first time I encountered algebraic structures during my education in the Czech Republic was last year of grammar school, in a seminar f

Just another data point: first time I encountered algebraic structures during my education in the Czech Republic was last year of grammar school, in a seminar for students who took maths as part of the exit exam (https://en.wikipedia.org/wiki/Matura#Maturita_in_the_Czech_Republic https://en.wikipedia.org/wiki/Matura#Maturita_in_the_Czech_R...). And then in the second year of CS at the university. Also, we did functional, logic and also imperative programming in the first year. I really did live under the impression that CS education is meant to give you all these foundations, and it's a TIL today that it's not universally true.