Here’s a fun one! Inspired by a conversation with Chris Daniels of Public Math. He said roll paper around a cylinder and cut on an angle to get an ellipse and produce a sine wave. So we did! And you can too. Then you can make a roller from ellipses, reflect your sine curve and roll the elliptical roller along

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## Take and Make: Freese Transformation 178

This design is from a lost manuscript of Ernest Irving Freese found by Greg Frederickson and published in his 2018 book “Ernest Irving Freese’s Geometric Transformations: The Man, the Manuscript, the Magnificent Dissections” Frederickson mentions Freese’s manuscript in the bibliography of his 1997 book, “Dissections: Plane & Fancy, and included selections from it in a 5-part series of short chapters spread

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## Take and Make: Tower of Hanoi

Ximena Garcia made a laser design for the Tower of Hanoi puzzle. You make two of each disk and glue them together for nice chunky pieces. We use dot stampers (for bingo sheets) to color the wood. Works great! The laser files are in this folder on our webpage. Tower of Hanoi is a model of exponential growth – number of

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## Take and Make files are spreading! Fantastic!

It is very exciting to see our files being used and the great results! Gotta love the math and maker communities on twitter! Thank you @MathHappensOrg https://t.co/yJ63LBiqJp — Ralph Pantozzi (@mathillustrated) March 13, 2020

## Take and Make: Folding Parabola

See how this grid folds into a parabola. More Parabola information in “owners manual” format by Michelle Tat. We laser cut the holes in the cardstock and added some laser etched lines to make the folds crisp. Find the laser files here. This thing is a great fidget and you would be surprised at the tenacity young children and even adults to

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## Take and Make: Hinged Parabola Stretcher

Super simple and yet kind of cool. You need a machine screw, a wing nut, some scrap wood about 4″x.5″, and some stretchy elastic. Directions and Files Here. Check the video on Twitter to see how it moves. Article from American Mathematical Association here. Also if you don’t want to make from scratch, we could send you the parts. Fill

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## Take and Make: Laser cut 3d Tangrams

Viang Shah created his own Corel Draw file to make this design. You are invited to make your own design files or use his which are posted in Corel, AI and SVG formats.

## Take and Make – Quadrants for 8th Graders

We are always excited when makers and maker spaces make our math models! Patrick Benfield outfitted some 8th graders with Quadrants (or Clinometers) and put this post on Instagram (click on photo below). Be sure to scroll through and also check out Patrick’s other work. You can find the files to make this here. View this post on Instagram Making

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## Take and Make: Pythagorean Puzzles are a hit in Middle School

These two Pythagorean Theorem Puzzles were a hit with Paola Garcia’s middle school students. Paola mentioned that some students who are not as facile with pen and paper exercises excelled with the wooden puzzles and that overall everyone enjoyed them. Laser cutting files are posted here. These do not have the solutions etched into the board

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## Take and Make Proportional Calipers and Golden Ratio

If you want to check Baby Yoda among other structures real and imagined for proportions, especially the Golden Ratio, get these files for Corel Draw, or Adobe Illustrated or there’s an SVG. Let us know if you need a different format or other help and we’ll see what we can do. We use baltic birch 1/4″ thick. You can adjust

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