Euler was invited by Peter I of Russia in 1727 to work in the
Petersburg Academy of Sciences. He introduced the fundamental math
disciplines in school math education:
these 4 are taught as separate and specific subjects, versus 19 duplicated disciplines in Europe.
Euler influenced not only in Russia schools, but in schools worldwide today.
Source: Russian Mathematics Education
Vol 1: History and world significance
Vol 2: Programs and practices
(Publisher: World Scientific)