The document discusses the mastery approach to teaching mathematics commonly followed in high-performing East and Southeast Asian countries. It outlines key principles of the mastery approach, including high expectations for all students, keeping most students progressing at the same pace, and using precise questioning and regular assessment to identify and support students needing intervention. The 2014 UK national curriculum reflects this mastery approach, aiming for most students to achieve mastery of mathematics. Teachers require in-depth subject and pedagogical knowledge to effectively implement this approach.