Build up to algebraic thinking by exploring this balance tool using shapes of unknown weight. Challenge yourself to find the weight of each shape in one of six built-in sets or a random set. Two other ...

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

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 ...

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 ...

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

"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 ...

1906 Association Drive Reston, VA 20191-1502 (800) 235-7566 or (703) 620-9840 FAX: (703) 476-2970 [email protected] ...

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 ...

NCTM recognizes the importance of having your teachers working together to ensure best practices in mathematics teaching and learning and offers discounts on membership for groups of 10+. NCTM ...

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 ...