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 ...

A net is a two-dimensional figure that can be folded into a three-dimensional object. Which of the nets below will form a cube? Click on any net, and determine whether or not it can form a cube. An ...

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 ...

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 ...

Bobbie Bear is planning a vacation and wants to know how many outfits can be made using different colored shirts and pants. Click on a shirt or a pair of pants and drag it over Bobbie Bear. Release ...

Oh, no! Okta and his friends need help. Help rescue them by transporting them to a safe ocean. How fast can you transport the Oktas? Use your counting skills to save as many as you can before the ...

Use your NCTM login to access the Speaker Ready Room portal to accept or decline the invitation to speak, add your speaker bio, add presentation handouts, view your presentation day/time/room or view ...

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 ...

A comprehensive and coherent set of mathematics standards for each and every student from prekindergarten through grade 12, Principles and Standards is the first set of rigorous, college and career ...

NCTM position statements define a particular problem, issue, or need and describe its relevance to mathematics education. Position statements are approved by the NCTM Board of Directors.

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 ...

An inspiring and practical book, Math Trajectories for Young Learners shows how to make math come alive through rich content, joyful experiences, and vibrant classroom cultures. With anecdotes, ...