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 ...

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 ...

A rhombus has four congruent sides. A rectangle has four congruent angles. But a square has four congruent sides and four congruent angles. Using a Venn diagram, the relationship would look like this: ...

Writing for a department is a great way to begin writing for our profession. Department articles are often drawn from your daily interactions with students. If it is of interest to you and your ...

This applet allows students to individually practice working with relationships among fractions and ways of combining fractions. For a two person version of this applet see the Fraction Track ...

Board of Directors Election. NCTM members will be electing a President-Elect and four new Board members to the Board of Directors this spring. The Board of Directors sets the ...

The NCTM Spring Conferences provide dynamic, face-to-face networking and learning opportunities for mathematics educators across the nation. These opportunities are a great way to engage with your ...

Formative assessment is any assessment task designed to promote students' learning. These tasks give both teachers and students feedback, so that teaching and learning activities can be altered ...

This applet allows for the discovery of the incenter and incircle of a triangle.

Adoption of curriculum materials is one of the most important decisions a teacher, school, or district can make. While state standards describe what students are expected to learn and be able to do, ...

The Common Core State Standards (CCSS) are a set of academic standards in mathematics and English language arts/literacy (ELA) developed under the direction of the Council of Chief State School ...

See how well you understand function expressions by trying to match your function graph to a generated graph. Choose from several function types or select random and let the computer choose.