# David Poras Head of Content, MS Math Teacher

Head of Content, MS Math Teacher

I am a middle school math teacher with the Weston Public Schools and Head of Content for Mathigon. I live in Newton, MA (just outside of Boston, MA in the United States) with my wonderful wife Jenna and my two children Ryan and Emily. My preferred pronouns are he/him/his.

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**David Poras**

Head of Content, MS Math Teacher

The triangle inequality theorem is coming soon in 7th grade. We'll use physical tools (pasta) and virtual ones to explore both the theorem and how often we can make a triangle when breaking a line in 2 random spots: http://youtube.com/watch?v=d6CQQEHpm18

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**David Poras**

Head of Content, MS Math Teacher

Have you explored the new Logic and Computing tiles on Polypad? Check out this recent webinar recording to learn more about these tools!

https://www.youtube.com/watch?v=w2zjaxnY5Co

https://www.youtube.com/watch?v=w2zjaxnY5Co

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Polypad**David Poras**

Head of Content, MS Math Teacher

Come join the next Mathigon webinar on Wednesday, October 13th at 7 PM EDT. We'll explore the Data Science tools available on Polypad. Sign up at mathigon.org/events. Hope to see you there!

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**David Poras**

Head of Content, MS Math Teacher

The first talk in the Mathigon Guest Speaker series was last week. Dr. James Tanton shared 12 proofs that 2 = 1. It was a joy-filled and engaging session. Watch the talk at https://www.youtube.com/watch?v=JbbU4GgpXLk. I think you'll find it worth your time! Sign up for future events in the Guest Speaker Series at mathigon.org/events.

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**David Poras**

Head of Content, MS Math Teacher

The next Mathigon webinar will focus on Exploring Data Science on Polypad. We'll explore the graphs and chart features and work through some activities together. We may even preview some upcoming features! Next Wednesday, Oct 13th at 7 PM EDT. Sign up at mathigon.org/events. Hope to see you there!

**David Poras**

Head of Content, MS Math Teacher

The interactive animations in the Introduction to the Circles and Pi course can help students visualize the proof for the formula of the area of a circle.

https://mathigon.org/course/circles/introduction

https://mathigon.org/course/circles/introduction

**David Poras**

Head of Content, MS Math Teacher

Working on adding fractions with students? Consider using this lesson on Egyptian Fractions! https://mathigon.org/task/egyptian-fractions

**David Poras**

Head of Content, MS Math Teacher

In this version of Bingo, using different sided dice can motivate students to discuss the sample space and probabilities of the different numbers that can be rolled. https://mathigon.org/task/bingo

**David Poras**

Head of Content, MS Math Teacher

Easily changing the scale of the numbers lines on Polypad can help students create a visual model of multiplying decimals. Learn more here: https://mathigon.org/task/decimal-multiplication

**David Poras**

Head of Content, MS Math Teacher

Using the Algebra Tiles on Polypad can help students make sense of and visualize what it means to "Complete the Square." https://mathigon.org/task/completing-the-square