# Circle Math

## Collection by Danita Stewart

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Browse over 150 educational resources created by Tina Kolley in the official Teachers Pay Teachers store.

These are a couple of the interactive notebook pages my class used when we were studying measurement of circles. Students so often get mixed up about the formulas for circumference and area. I think...

Prove πR² using only beads and a ruler! I first saw this proof in an article by Russell Jay Hendel, Dowling College: http://bit.ly/LQlwQw minutephysics is no...

I'm not sure what I was dreaming about or why but when I woke up in the morning I had the idea to make a board game to help my son learn the four types of triangles: Scalene Right-angled Equilateral Isosceles Too afraid to forget the idea, I got out of bed, sacrificing sleep for this new activity. First, I made a cheat sheet to help my son learn the differences between the four types of triangles. Then I made a template for a cut-and-fold die with the four types and two other commands…

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Pi song! Sheet music is available here: https://drive.google.com/file/d/1mF9ydrLxkAp4OC9wwRD-iKJ24C_okrit/view?usp=sharing The story behind this video: https...

Target has a sense of humor.

Our Pi Playlist (more videos): http://bit.ly/PiPlaylist How accurately can we calculate Pi using hundreds of REAL pies? More links & stuff in full descriptio...

We are studying circumference of circles. We started by using this awesome idea I saw on Pinterest. My kids loved doing this for vocabulary instead of writing definitions. I created two lessons and the kids LOVED LOVED LOVED them! The idea was for them to practice finding the diameter, taking that information to get the radius and then find the circumference to practice using the formulas. Click on the picture to get this activity for free. I have been collecting lids and round things for a…

Here is a Circular GEOBOARD (hands-on math tool) that can be used with kids for FUN Measurement lessons as well as geometry and other areas of math. Circumference and Diameter with an elastic and hair bands The above picture shows how kids can use the Circular Geoboard for finding the Diameter and the Circumference of a circle. It could also show symmetry, fractions, etc. Circumference and Chords You can purchase geoboards or make your own. Some geoboards are double sided (a square on one…

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

Another way to play pi. Melody of pi ©1992 Lars Erickson