iiinova — where your digital self keeps evolving

Matt Enlow @unsolvedmre.bsky.social · 21h

We just got training last Friday on how to use the CNC machine in our MakerSpace. Now my head is spinning with ideas...

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Matt Enlow @unsolvedmre.bsky.social · 24/09/2026

Simple pleasure: When all of my students are present on Test Day. #iTeachMath

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Matt Enlow @unsolvedmre.bsky.social · 24/09/2026

My hilarious 15yo daughter, ladies and gentlemen

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Matt Enlow @unsolvedmre.bsky.social · 09/09/2026

Write a single equation in x and y, using only the 4 arithmetic operations and the absolute value function (finitely many times), whose graph is this square. #iTeachMath #math #maths #MathSky

A square, centered at the origin, with side length 2, and with sides parallel to the axes.

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Matt Enlow @unsolvedmre.bsky.social · 03/09/2026

Asked my Alg II Honors students to list the elements of ℤ ∩ {Taylor Swift songs} today #iTeachMath

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Matt Enlow @unsolvedmre.bsky.social · 28/08/2026

Fitting that the new mnemonic device for the Great Lakes would be SHAME

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Matt Enlow @unsolvedmre.bsky.social · 27/08/2026

I wonder what being ready for classes to start feels like

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Matt Enlow @unsolvedmre.bsky.social · 03/07/2026

In each diagram, the green area and blue area are equal

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Matt Enlow @unsolvedmre.bsky.social · 01/07/2026

My feelings about A.I. and math

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Matt Enlow @unsolvedmre.bsky.social · 30/06/2026

If just one other person gets this reference I'll be thrilled #GreatAmericanStateFair

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Matt Enlow @unsolvedmre.bsky.social · 16/06/2026

Suppose a hollow cone with radius 15cm and height 20cm is being filled with water. If it were base-down, the area of the surface of the water would decrease as the cone filled; if, instead, it were balancing on its point, the area of the surface of the water would increase as the cone filled. [1/2]

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Matt Enlow @unsolvedmre.bsky.social · 03/06/2026

Just found this. It will take everything I have to give the "Ditch Geometry" proponents a fair hearing. I'm going to need some time before even pressing Play, though, to feel my initial feelings of sadness and anger that this is even something we're contemplating. www.youtube.com/watch?v=8RE1...

youtube.com

Debate 22 - Ditch Geometry

YouTube video by DebateMath Podcast

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Matt Enlow @unsolvedmre.bsky.social · 27/05/2026

The integers from 1 to 18 can be arranged in a circle so that, when following the circle (counter-clockwise in the below example), every number is the sum of the previous two (mod 19). For what other mods can we do this? That is, for what other integers m can the integers 1 to m-1 be so arranged?

The numbers, starting at 1 and going counter-clockwise, are
1, 15, 16, 12, 9, 2, 11, 13, 5, 18, 4, 3, 7, 10, 17, 8, 6, 14

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Matt Enlow @unsolvedmre.bsky.social · 02/05/2026

Currently wondering: Can an equilateral pentagon have five distinct interior angle measures that are all rational multiples of π radians? If we remove "distinct," there's at least the regular pentagon with five angles of 3π/5, and another pentagon with two π/2's, two 5π/6's, and a π/3. #MathSky

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Matt Enlow @unsolvedmre.bsky.social · 01/05/2026

A couple of Advanced Topics students reviewing for their test today #iTeachMath

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Matt Enlow @unsolvedmre.bsky.social · 29/04/2026

I always roll my eyes when an A.I. chatbot describes something as "fun," or reports being "curious" about something. Because... no. That's not what's happening. This was a new one on me, though. Why not just omit the "us"?

Q: When did the song "I'll Be There" by The Escape Club peak on the Billboard Hot 100?

A: It peaked at #8 on the Billboard Hot 100 on the chart dated June 8, 1991. On that week’s chart, the song climbed from #65 all the way to #57? Wait—Billboard’s archived weekly movement shows it was in its 25th week and marked with “Peak: 8,” indicating that June 8 was the issue on which it officially reached its highest Hot 100 position.

A couple of related chart tidbits:

It was The Escape Club’s last Hot 100 hit.
It finished #65 on Billboard’s 1991 year-end Hot 100.

And honestly, FOR A LOT OF US GEN X RADIO LISTENERS (my emphasis), this is one of those songs that felt even bigger than #8 because it was absolutely everywhere for a stretch in spring/early summer ’91.

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Matt Enlow @unsolvedmre.bsky.social · 28/04/2026

I am still-occasionally-reflexively-hits-Command-S-even-when-working-in-Google-Docs years old

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Matt Enlow @unsolvedmre.bsky.social · 27/04/2026

🎶 … by the moon and the stars in the sky… 🎵

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Matt Enlow @unsolvedmre.bsky.social · 15/04/2026

A parabola rolls along a flat surface. What path does its focus (the red point) trace? Another parabola? Or something else? #iTeachMath #math #maths #mathgif #mathgifs #mathsgif #mathsgifs

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Matt Enlow @unsolvedmre.bsky.social · 13/04/2026

Today in Advanced Topics we tried to create a "quadratic formula" for solving quadratic equations in ℤₙ. I'd never done that before. Wasn't planning on doing it today. But that's where our rabbit hole led us. We haven't worked out all the kinks, but the messiness is part of the fun. (Ask any kid.)

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Matt Enlow @unsolvedmre.bsky.social · 12/04/2026

An xy projection of the 3D Halverson attractor. I coded it in #Mathematica, then asked #ChatGPT to port it to html/js so it can run in a browser. That's what you're seeing here.

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Matt Enlow @unsolvedmre.bsky.social · 09/04/2026

Springtime in Algebra II Honors is fun-arithmetic-sequence-problems season... #iTeachMath #iTeachMaths #math #maths

$Let $S_n$ denote the sum of the first $n$ terms of a particular arithmetic sequence. If $S_{50}=200$ and $S_{200}=50$, for what value of $n$ does $S_n$ attain its maximum value?$

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Matt Enlow @unsolvedmre.bsky.social · 07/04/2026

Four unit spheres, centered at (±1,±1,0)... and their convex hull. Each in a single line in #Desmos 3D. Can you do it? #iTeachMath #math #maths #geometry desmos.com/3d

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Matt Enlow @unsolvedmre.bsky.social · 05/04/2026

> image of Jesus eating a hotdog, the text underneath it reading “He Is Glizzin’”

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Matt Enlow @unsolvedmre.bsky.social · 24/03/2026

My 15yo son manages to get pizza sauce on every new article of clothing the first time he wears it. Even if we haven't eaten pizza. Somehow he still makes it happen.

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Matt Enlow @unsolvedmre.bsky.social · 23/03/2026

Going to try to discover some log rules in Alg II Honors today #iTeachMath

$Suppose $x=\log_2{30}$ and $y=\log_2{5}$. Which of the following can be written in terms of x and y? How? (Be prepared to explain your answers.) $\log_2{6}$ $\log_2{10}$ $\log_2{15}$ $\log_2{20}$ $\log_2{25}$ $\log_2{35}$ $\log_2{125}$ $\log_2{150}$$

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Matt Enlow @unsolvedmre.bsky.social · 22/03/2026

My kids introduced me to this and I will never forgive them for it

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Matt Enlow @unsolvedmre.bsky.social · 21/03/2026

Kitchen hack: Use a poker chip set—heavy, but low center of gravity—to press tofu

Two blocks of extra-firm tofu, between two cloths, with a metal case full of poker chips

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Matt Enlow @unsolvedmre.bsky.social · 21/03/2026

A "making of" my #mathart post from yesterday

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Matt Enlow @unsolvedmre.bsky.social · 12/03/2026

Just checking in on my Janus account. This is what I see (minus personal specifics): the Contrarian fund living up to its name

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Matt Enlow @unsolvedmre.bsky.social · 08/03/2026

One minute you're puzzling over a simple probability question, the next minute you're unironically typing out an expression that looks like this

$v_i=\prod _{j=1}^n \frac{\left(a_{j,1}+a_{j,2}\right)!}{a_{j,1}! a_{j,2}!} \left(\left(p-\frac{1}{2}\right) \delta _{i,j}+\frac{1}{2}\right){}^{a_{j,1}} \left(\frac{1}{2}-\left(p-\frac{1}{2}\right) \delta _{i,j}\right){}^{a_{j,2}}$

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Matt Enlow @unsolvedmre.bsky.social · 07/03/2026

Hyperbolic surfaces spotted at the Andrew Gn exhibit at the Peabody Essex Museum

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Matt Enlow @unsolvedmre.bsky.social · 02/03/2026

Here's a fun Geometry quickie: A particular polygon has only two distinct interior angle measures: 165° and 166°. How many sides does it have? #iTeachMath

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Matt Enlow @unsolvedmre.bsky.social · 28/02/2026

Me figuring out how to make Canvas API calls from Google Sheets

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Matt Enlow @unsolvedmre.bsky.social · 22/02/2026

I vibe-coded a web app that allows you to walk around on the surface of a gyroid. It's just as disorienting as you'd expect. velvety-arithmetic-0a8353.netlify.app

velvety-arithmetic-0a8353.netlify.app

GYROID

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Matt Enlow @unsolvedmre.bsky.social · 18/02/2026

It's kind of a running gag in our house about how boring my Facebook posts were before we had kids, but this one kind of takes the cake

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Matt Enlow @unsolvedmre.bsky.social · 15/02/2026

MAA MathFest is in Boston this year! I've never been, and always wanted to. A significantly reduced registration rate for K-12 teachers? And I might be able to bring one of my kids as a "guest"? This may be my opportunity! Anyone else I know planning on attending? maa.org/event/mathfe...

maa.org

MAA MathFest – Mathematical Association of America

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Matt Enlow @unsolvedmre.bsky.social · 02/02/2026

Three words/phrases you never want to hear from your plumber when you're describing your problem over the phone: "absolute nightmare," "worst-case scenario," and "jackhammer"

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Matt Enlow @unsolvedmre.bsky.social · 31/01/2026

One superpower #math gives me is the ability to picture an interesting object in my head, spark up #Mathematica, and within a few minutes figure out how to make it "real." It's intoxicating! (code in ALT)

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Matt Enlow @unsolvedmre.bsky.social · 22/01/2026

After a few weeks of repeated discussion and revision, here is where the Axiom (& Theorem) List for ℤ that my Advanced Topics class has been generating from scratch—with some prodding and guardrails provided by me—currently stands. (Proofs of the Theorems are located elsewhere.) #MathSky #iTeachMath

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Matt Enlow @unsolvedmre.bsky.social · 20/01/2026

Why are the emails that require the meagerest of replies—"All set!" "Thank you!" "Great! See you then!"—sometimes the hardest to get myself to write?!? Makes no sense. Stupid #ADHD brain...

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