Mathematical Explorations: Find the Distance: No Formula Necessary

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This activity involves finding the distance between two points in a coordinate plane and emphasizes reasoning from repeated calculations, which is one of the mathematical practices specified by the Common Core State Standards for Mathematics.

Supplementary Materials

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Contributor Notes

Ryota Matsuura, matsuura@stolaf.edu, is an assistant professor of mathematics at St. Olaf College in Northfield, Minnesota. His interests include how teachers acquire mathematical habits of mind and apply these habits to their classroom instruction.

Yu Yan Xu, yu.yanxu@lawrence.k12.ma.us, is a mathematics teacher at the Humanities Leadership and Development High School in Lawrence, Massachusetts. She has been teaching in Lawrence for the past seven years, helping her students develop good mathematical habits and an appreciation for the subject.

(Corresponding author is Matsuura matsuura@stolaf.edu)(Corresponding author is Xu yu.yanxu@lawrence.k12.ma.us)
Mathematics Teaching in the Middle School

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