I am a math professor and an advocate for free education. I run a YouTube channel that I hope to grow into a great resource for math!

Joined September 2016
199 Photos and videos
Pinned Tweet
First video in my series to explore why commonly known mathematical facts are true, rather than just taking them for granted. First up: Pythagorean Theorem. Let me know if you would like to see any particular topic done. #math #iteachmath #mtbos youtu.be/YDnm58svCCQ
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I have officially moved away from x/twitter and to Bluesky. Feel free to follow me there! bsky.app/profile/professorhp…

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Been working on a set of GIFs demonstrate some ideas in my Math for Teachers course. Started with a sequence on demonstrating counting principles. You can find the full set here: professorheather.com/princip…
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Here is my updated animation for the way the PMF of a hypergeometric distribution changes when you change the number of individuals with the desired property. #math #mtbos
Getting ready to teach Probability & Statistics this summer, so I am redoing all of my images and animations. Here is the PMF of the binomial distribution for n = 20. #math #mtbos
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As I am cleaning/reorganizing my office, I wanted to share one of my shelves. The black abacus near the front of the second picture was a gift, but all of the rest were made for me by students.
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Discussed CAT(0) cube complexes in my senior seminar today. The first picture is the model I created to demonstrate the ideas. The second has the ones they constructed.
Today for #BlackHistoryMonth, I want to introduce you to Thomas Fuller. Thomas was a slave in Virginia, and was renowned for his mathematical abilities, despite having no education. en.wikipedia.org/wiki/Thomas…
Today for #BlackHistoryMonth, you should learn about Benjamin Banneker. He had very little formal education, but had a strong interest in mathematics and built America's first clock. It was a wooden device that struck every hour. #math en.wikipedia.org/wiki/Benjam…
Today for #BlackHistoryMonth I want to introduce you to Elbert Cox. He was the first African-American to ever receive a PhD in mathematics. There is now a scholarship fund named in his honor that is used to help black students pursue studies. #math en.wikipedia.org/wiki/Elbert…
In honor of Black History Month, you should check out the story of Euphemia Haynes. She was an American mathematician and educator. She was the first African-American woman to earn a PhD in mathematics! #math #BlackHistoryMonth
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We discussed nets and polyhedra in my education class today, so this is their homework. Create a dodecahedron full of different nets and their properties.
Finally, I look at finding the area of a triangle, knowing SAS using @geogebra. I also want to make a video of this one and discuss why this works! #math #iteachmath #mtbos geogebra.org/m/qavdkk38
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For a different way to calculate area of a triangle, here is Heron's formula using @geogebra. I want to make a video explaining why this works soon! #math #iteachmath #mtbos geogebra.org/m/djpswb2w
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Next up is an exploration on the area of general triangles using @geogebra. For this one, we use the formula for the area of the right triangle. #math #iteachmath #mtbos geogebra.org/m/u3x46gee
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Working on area of triangles this week in one of my classes, so I was inspired. Here is an exploration on the area of right triangles using @geogebra #math #iteachmath #mtbos geogebra.org/m/fj7yvhbm
As an early holiday present to myself, I had my logo redone, and got a new animated version!
I always show memes in my classes. This is the one that always gets a super positive reaction from students. It is always their favorite.
Getting my coordinate systems ready to talk about the cross product and the right-hand-rule today!
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My entry to the @3blue1brown competition. I look at one of my favorite bits of math: The Euler Characteristic. youtu.be/NDbl9XvBO1E

This is my go-to math kit for the fall semester. I will bring it to every class so I always have appropriate materials and we can create the math as we go! Any suggestions for things to add? #mtbos #iteachmath
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