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
How Many Under the Shell
Exploring Addition and Subtraction Relationships with Okta
preK-2
How Many Under the Shell

After Okta hides some bubbles under a shell, he then either adds more bubbles or takes some away. Students can learn their addition and multiplication facts by challenging themselves in this customizable, interactive game.

 

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 StoriesLove at First Site

Victoria Miles has proven that one can fall in love at first site. Read her story, as featured in Bright Ideas.

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Highlighted Lesson
A System for This Sweet Problem
Problem Solving using Systems of Equations
9-12
There Has to Be a System for This Sweet Problem

Get in the Halloween spirit with this unconventional problem about candy. To get to the answer students have to combine their knowledge of algebra and problem solving skills. Will your students be tricked or will they find the treat of a right answer?

 
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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