Resources at your fingertips!

This is your NCTM community.


  • You have been hired by the "Building Boxes" packaging company to design a box in the shape of a rectangular prism. The box will be made from an 8.5-inch by 11-inch rectangle by cutting a square from each corner and then folding up the sides of the box. ...

  • The 2-d shape created by the green line when the net ABCDEF is folded would be a square, because.... When BCDE sides are folded , they will create the top, left side, bottom and right side of a cube. A and F will be the front and back. Since ABCDEF ...

  • First I look for a common multiple of 5, 6 and 10. That would be 30. Then I convert all the fractions to equivalent forms with a common denominator: 1/5 dimes = 6/30 dimes. 1/6 nickels = 5/30 nickels, 1/10 quarters = 3/30 quarters. This means 6/30 ...

From the Blogs

  • This blog is for  The Virtual Conference on Mathematical Flavors . I am honored to be a keynote. The discussion below is based on what I consider to be my seminal work as researcher and educator. Unpacking ...

  • Why Desmos? My classroom is a noisy one - full of discussions, debates, and even arguments.  This is not how it always was. When I first started teaching, my desks were lined up in rows and students ...

  • How can we promote mathematics play in more classrooms? What is within our power to make playfulness a norm in maths class? To be honest, there is no special magic necessary here. The strategies offered ...


Find Other Members

Search the Directory


Get Classroom Resources

Learn More


Explore Professional Development

Learn More

Most Engaged Members