These are really fun! This design could possibly be improved but it does work pretty well. The newest version files are here in AI, SVG and Corel formats. It’s a pretty simple design. Here are the parts. Basically a larger square overhangs the smaller creating a channel with partial cover that the little “cars” can slide in, but not pop

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## Take and Make: Puzzle A Day

This puzzle is available to buy various places, but you can also just make your own. We colored the wood with Bingo daubers! MH Intern Quan Nguyen worked out a number of solutions and made the CAD file for this one. Our files are in this folder: https://drive.google.com/drive/folders/10eLBgD1HvO-bEXeYqTU9bYFZzJi8Wpm1?usp=sharing in AI, SVG and Corel Formats Also you can find solutions for

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## Take and Make: Reuleaux Car

The Reuleaux Car The pieces are below, and an AI, SVG, and Corel File are available here. The file has a laser etch on the big wheel to guide the placement of the smaller piece. Glue two small pieces to one side and two large ones on the other side. The wheel holders work by sliding so you can install

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## Take and Make: Conic Sections Model update

Turns out you can use CorelDraw to reverse engineer the parts to a conic section model. Read all about it in the November 2021 MAA Math Horizons page called Do The Math (p. 29). Editor Tom Edgar was fun to work with, and made the graphic images. The files are here, please help yourself. We cut ours out of 1/8″

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## 2021 Guest Talk at UTeach Perspectives Class! on Oct 13

We had a few slides to introduce MathHappens to the group and then dove right in to a hot topic, redistricting or Gerrymandering. We just had the proposed new Texas map released, but none of the negotiated changes that came the next day on the 14th, so there were real examples of all 4 types of Gerrymandering which are cracking,

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## MathHappens at Neill-Cochran House Museum Day 2021

At Austin Museum Day 2021, MathHappens hosted a suite of activities at the Pythagorean theorem tables led by Naila Najiyeva, Laila Cook, Quan Nguyen, and Rashell Soria. Visitors were able to see the Pythagorean Theorem Proof and the Sum of Odd Numbers proof. At the tables, they also saw the Penrose stairs and a modern day application of it.

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## MathHappens at Museum Day September 19, 2021

We are so excited to be back in person this year for Austin Museum Day! This year we will be hosting activities at two locations: Austin Nature and Science Center and Neill-Cochran House.

## Making Math Makes Sense

We’ve said it before and we said it again at the Connected Learning Summit in July. this was a great month of programs. You can see some of the keynote speakers as well as find our Ignite talk among some other excellent 5 minute presentations (2nd session, 2nd talk) in their post here. Highlights From the 2021 Connected Learning Summit

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## Geometric Shapes and Tools with Campers at STEM Santa FE

We took a “Maker” approach at STEM SantaFe’s camp this week. Students experimented with different ways to make a moveable joint using a variety of materials: balloon pieces, tin foil, brads, rubber band and even the wax paper bag the materials came in. Creative ideas included bending the brads to make tension, combining brads with balloons. We also made 3

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## Geometry Kit for Connected Learning Session/Rosenthal Prize Update

MoMath has posted the Rosenthal Prize Lessons! Check out ours called Building a Tool to Deepen Understanding here. It has lots of great photos. We are very excited to present this activity as part of our presentation at Connected Learning Summit. It has potential for a lot of great Maker elements. You can start from scratch with two dots 2″

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