My Heart Tweets: Number Sense: the most important mathematical concept in 21st Century K-12 education

Tuesday, January 3, 2017

Number Sense: the most important mathematical concept in 21st Century K-12 education

Number Sense: the most important mathematical concept in 21st Century K-12 education. My HuffPost follow-up article https://t.co/c4S2ZhfkBU
— Keith Devlin (@profkeithdevlin) January 1, 2017

via Twitter https://twitter.com/profkeithdevlin

January 02, 2017 at 04:39AM

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