卫星时刻是啥？美国数学分数跌，经济学人梳理美国数学教育直至Common Core历史。讲述传统和革新派数学教育，为何不选世界最好的新加坡数学，介绍社会正义数学和觉醒数学中种族主义的2+2=4 Economist「经济学人」文章探讨

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本期「经济学人」原文：

Problem-solving | America’s maths wars

How teaching multiplication tables became another victim of the political divide

https://www.economist.com/united-states/2021/11/06/americas-maths-wars

Nov 6th 2021 edition

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