Thank you to all who attended the NCTM 2025 Spring Conference in Kansas City! A special thanks to our program committee, ...

The Factor Game applet was adapted with permission and guidance from "Prime Time: Factors and Multiples," Connected Mathematics Project, G. Lappan, J. Fey, W ...

"We live in uncertain times. Public health is at the forefront of our minds, and our schools have been disrupted in ways we have never seen. Although no one can predict how education might look in the ...

Teachers should strive to create learning spaces where every student feels valued and seen and is empowered to succeed. Disrupting Injustice: Navigating Critical Moments in the Classroom provides ...

Building Sets of 13 and 14 Lesson PreK to 2nd Building Sets of 15 and 16 Lesson PreK to 2nd Building Sets of 17 and 18 Lesson PreK to 2nd Building Sets of 19 and 20 Lesson PreK to 2nd Building Sets of ...

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Did you know that for over 2,000 years people believed that no proof could be developed for the Pythagorean Theorem using trigonometry? In his book The Pythagorean Proposition (1968), mathematician ...

NCTM would like to recognize and congratulate the 102 NCTM members recently announced as recipients of the 2021-2023 Presidential Awards for Excellence in Mathematics and Science Teaching-the nation's ...

The latest National Assessment of Educational Progress (NAEP) mathematics scores for grades 4 and 8 underscore persistent challenges in mathematics education and highlight the urgency of improving ...

A rhombus has four congruent sides. A rectangle has four congruent angles. But a square has four congruent sides and four congruent angles. Using a Venn diagram, the relationship would look like this: ...