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 ...

Use this tool to strengthen understanding and computation of numerical expressions and equality. In understanding equality, one of the first things students must realize is that equality is a ...

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Use tiles to represent variables and constants, learn how to represent and solve algebra problem. Solve equations, substitute in variable expressions, and expand and factor. Flip tiles, remove zero ...

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.

The Factor Game is a two-person game in which players find factors of numbers on a game board. To play, one person selects a number and colors it (as shown below in blue). The second person colors all ...

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If you have experience and expertise on a particular topic in mathematics, consider becoming a speaker at an upcoming NCTM event. Being a speaker is a great way to increase your exposure and build ...

Educational decisions made by teachers, school administrators, and other professionals have important consequences for students and for society. The Principles for school mathematics provide guidance ...

Principles and Standards for School Mathematics is a guide to what mathematics students should learn; what teaching practices, approaches, and tools show promise; and the role that assessment plays in ...

Dung Tran, Victoria University–Melbourne, Australia, and Hue University College of Education, Vietnam; Barbara J. Reys, University of Missouri–Columbia; Dawn Teuscher, Brigham Young University; ...

A developing set of resources for teachers and the community to teach through the mathematics associated with the COVID-19 pandemic and learn math. Discussion also in the MyNCTM community. The ...