Students analyze the structure of algebraic expressions and a graph to determine what information each expression readily contributes about the flight of a horseshoe. This task is particularly ...

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 ...

These grade-band specific professional learning modules are focused on the Effective Teaching Practices and Guiding Principles from Principles to Actions: Ensuring Mathematical Success for All.

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 ...

I am thinking of making a quilt from an illustration that appeared on the cover of an old Scientific American magazine. Here's a sketch of what it looks like: ...

The purpose of this lesson is to use the geometry of regular polygons inscribed in and circumscribed about the unit circle to create an algorithm for generating the digits of π, known to be the area ...

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 ...

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 ...

As a mathematics educator or researcher, your passion is ensuring that all students receive the highest quality math education possible. Membership in NCTM means access to the resources you need to ...

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 ...

The authors respond to a call to analyze issues of curriculum standards and to present alternative storylines by addressing criticisms of the Common Core State Standards in early childhood.

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 ...