Exploration Enter 4 onto the red pan. Then, enter 9 onto the blue pan. What happens? Why? Reset the balance. Enter 12 onto the red pan. Then, enter a sum (two numbers added together) onto the right ...

Discover a bold new vision for high school mathematics that empowers students through engaging, real-world learning. This essential publication reimagines the curriculum to focus on student-centered ...

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 ...

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 ...

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 ...

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 ...

NCTM established the Mathematics Education Trust (MET) in 1976 to channel the generosity of donors by creating grants for preservice teachers, in-service teachers, coaches, teacher-leaders, teacher ...

How do you help your students demonstrate mathematical proficiency toward the learning expectations of the Common Core State Standards (CCSS)? This teacher guide illustrates how to sustain successful ...

It is with sadness that we announce the passing of James T. Fey, who will be remembered for his leadership in the mathematics education community, nationally and internationally, championing ...

Joint Statement from NCTM, NCTE, NCSS and NSTA on Withholding of Education Funding As representatives of the K-12 teachers and leaders in the core subject areas, we are alarmed by the decision to ...

Thinking about numbers using frames of 10 can be a helpful way to learn basic number facts. The four games that can be played with this applet help to develop counting and addition skills. (This ...