NCTM Illuminations

31/10/2016

Happy Halloween from NCTM Illuminations. We hope your day is full of lots of tricks and treats. Celebrate with this candy themed brain teaser. http://ow.ly/jATf304R4Zn

A bowl contains 75 candies, identical except for color. Twenty are red, 25 are green, and 30 are brown. Without looking, what is the least number...

27/10/2016

Have you played Calculation Nation? 13 games to play! Can you reach the Grand Master status? http://ow.ly/s2BI304R5WF

Calculation Nation® is a free education service of The National Council of Teachers of Mathematics. NCTM is a public voice of mathematics...

24/10/2016

Kick off basketball season w/ this HS lesson, where students plot data, identify lines of best fit, & detect outliers. http://ow.ly/oPlW304R0UG

In this activity, students will use the Illuminations Line of Best Fit Interactive to plot the data from two teams during the 2004‑05 NBA season....

20/10/2016

Encourage students to use visualization, spatial reasoning, and geometric modeling to build their own patterns or recreate one from given square arrays. http://ow.ly/i8im304R3I8

Get your elementary students thinking about patterns using this mobile-friendly interactive.

18/10/2016

Get in the Halloween spirit with this MS lesson designed to develop and reinforce students' understanding of hundredths as fractions, decimals, and percentages. http://ow.ly/aW1W304QL4T

In this series of 3 hands-on activities, students develop and reinforce their understanding of hundredths as fractions, decimals, and percentages....

15/10/2016

October 15 is Bridge Day! Celebrate it with one of NCTM's most popular updated lesson, Barbie Bungees Again! http://ow.ly/OsTL304QKHQ

The consideration of cord length is very important in a bungee jump-too short, and the jumper doesn't get much of a thrill; too long, and ouch !...

10/10/2016

Get your high school students ready for Halloween with this geometry puzzle, Trick or Treat. http://ow.ly/z5S7304QMRf

Ralph and Rona were trick-or-treating when they arrived at the cul-de-sac shown at left. The cul-de-sac was in the shape of a regular nonagon...

04/10/2016

Demystify order of operations while celebrating Polish American Heritage Month with this high school lesson. http://ow.ly/kRSc304QXUw

22/09/2016

Happy First Day of Fall! There are a lot of exciting things going on this fall. Make sure you're a part of the learning and fun.

Find an event near you.

19/09/2016

Start the week off with this license plate brain teaser! Share your solution with us. http://ow.ly/h90v304hPmw

License Plate

16/09/2016

How have you used NCTM's Classroom Resources successfully? Be featured in our Success Stories by e-mailing us at [email protected]. http://ow.ly/ijJ5304hOaT

Read and share experiences of how people have used Illuminations’ resources.

13/09/2016

This one is a tricky brainteaser, you have to rummage around a bit to get the answer. Try it out and see what you can come up with. http://ow.ly/Ed3h303L3tE