Illuminations: Welcome to Illuminations
Explore our library of 104 online activities that help to make math come alive in the classroom or at home
View our collection of 545 lessons for preK-12 math educators
Learn about NCTM’s Principles and Standards for School Mathematics
Check out hundreds of exemplary online resources, as identified by an editorial panel
Highlighted Activity
Fractal Tool
Exploring iteration & patterns in shapes and numbers
3-12
Fractal Tool

Play with shapes that grow and change using an iterative process. Fractals are characterized by self-similarity, smaller sections resemble the larger figure. Can you see how these shapes are fractals? Check back on this tool soon as more features are added.

 

Calculation Nation

Challenge others. Challenge yourself.TM

Sign up for fun at Calculation Nation! Register for free, then challenge others in math strategy games, and see how you rank.

 

Success StoriesNot Just for Math Teachers

Terry Johanson and Kirsten Dyck teamed up to take an Illuminations lesson beyond the math classroom.  Read their story, as featured in Bright Ideas.

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Highlighted Lesson
Varying Motion
Measuring & graphing displacement, velocity, & acceleration
9-12
Varying Motion

Help students clarify their understanding of the relationship between the shape of a graph and the movement of an object. In this lesson, students explore their own movement. It serves as an excellent introduction to building blocks of calculus.

 
Dynamic Paper
A tool for every grade level
new
Dynamic Paper

Create customized activity sheets for your classroom! Nets of 3-D shapes, tessellations, coordinate graphs, and more — all based on your input.

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