Not sure about these after-class schools, but I can compare my ex-ussr school and uni education with math or CS undergrad textbooks I read a lot in English thes

Not sure about these after-class schools, but I can compare my ex-ussr school and uni education with math or CS undergrad textbooks I read a lot in English these day. Not sure about early education though. 1. Russian math books are straight to the point, superconcrete. Hard to read in a linear fashion but very useful when student is serious about going through it ("Problems in mathematical analysis" by Demidovich is a perfect example, Mark Vygodskiy's "Elementary Mathematics Reference"). 2. In most textbooks I remember nobody tries to build a dumbed down explanation of things. This might lead to the book being harder to understand without teacher's help. I remember how some American undergrad-level introductory math analysis books were trying to skip proofs, avoid certain details, giving too many intuitive explanations (). 3. Mid and late school math is pretty advanced, especially when compared to US typical level. These days I live in UK. Kids go to school early here: 4-5 years. My daugther is 6 and is comfortable with trivial math. I've read a few secondary school textbooks and they feel quite ok. So maybe this is a US problem. EDIT: a few example books added