Because of the Kumon method, that is used very little in the Ocident. Kids learn three-digits addiction in preschool, as well as nouns, verbs and adjectives. At

Because of the Kumon method, that is used very little in the Ocident. Kids learn three-digits addiction in preschool, as well as nouns, verbs and adjectives. At high school they already know advanced math (calculus, vectors, linear algebra, statistics, probability, etc...)