Created by the National Council of Teachers of mathematics, this site helps families enjoy mathematics outside school through a series of fun and engaging challenges.

由全国数学教师委员会创建，这个网站帮助家庭享受校外通过一系列生动有趣的数学挑战。

youdao

The most obvious example of this is the set of mathematics standards first put forward in the early 1990s by the National Council of Teachers of Mathematics.

UNESCO: II Part Analytic Section