October 2025 - We're launching a short, quarterly Advocacy Newsletter to keep you informed about how NCTM is working to advance policies at the federal level that support mathematics teachers, ...

With only 22% of seniors at or above NAEP Proficient and 45% below Basic, the nation must pivot from a singular focus on the top quartile to engaging all students in meaningful, real-world mathematics ...

This tool allows you to create any geometric shape imaginable. Squares, triangles, rhombi, trapezoids and hexagons can be created, colored, enlarged, shrunk, rotated, reflected, sliced, and glued ...

Infinite Possibilities: Inspiring Change Through our Mathematics Community is the theme for the 2025 Georgia Mathematics annual conference. The keynote speakers are Latrenda Knighten, NCTM president, ...

A tessellation is a repeating pattern of polygons that covers a plane with no gaps or overlaps. What kind of tessellations can you make out of regular polygons? What shapes tessellate? If shapes can ...

Okta challenges you to a duel! That crazy octopus wants to play you in a game where the first person to choose cards with a specified sum wins. You can choose how many cards, what types of numbers, ...

Focus in High School Mathematics: Reasoning and Sense Making is a conceptual framework to guide the development of future publications and tools related to grades 9–12 mathematics curriculum and ...

Considered the “premier mathematics education event of the year,” NCTM Annual Meetings bring together thousands of mathematics educators from all over the world to learn, collaborate, inspire, and ...

This activity allows the user to enter a set of data, plot the data on a coordinate grid, and determine the equation for a line of best fit.

This tool allows you to learn about various geometric solids and their properties. You can manipulate and color each shape to explore the number of faces, edges, and vertices, and you can also use ...

Change the number of sectors and increase or decrease their size to create any type of spinner. Then, conduct a probability experiment by spinning the spinner many times. How does the experimental ...

When students become active doers of mathematics, the greatest gains of their mathematical thinking can be realized. The process of sense making begins when we create classrooms full of curious ...