Math Links for Week Ending Oct 16, 2026

Featured Links

I love this interview with @stevenstrogatz, especially when he actually swears :-) All joking aside, I like the way he talks about the issues of how AI is now taking down some of the biggest math theorems and causing an existential crisis among mathematicians.
Curriculum Tags: All
https://radiolab.org/podcast/math-vs-machine

It's always fun to go on @Radiolab. Hope you enjoy this episode! https://t.co/jvGwLIaMDk

— Steven Strogatz (@stevenstrogatz) October 9, 2026

Resource Links

A combinatorics card game for your students
Curriculum Tags: MDM4U
https://jclevelandtran.com/2022/01/26/letter-scramble/

Played this game in my Pre-Calc class today. I think it might be one of the best games I've made - they all had lots of fun AND it gave them lots of practice. jclevelandtran.com/2022/01/26/l... #iteachmath

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— James Cleveland-Tran (@jclevelandtran.com) October 15, 2026 at 2:45 PM

Video/Audio Links

I should have posted this earlier but OAME members can see the recording of this webinar in the Members Only section of the OAME website
Curriculum Tags: All
https://talks.oame.on.ca/season-9



Ye old licence plate problem. A classic of any combinatorics lesson
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/2110851341283463632

I was wrong in my last video about California license plates 😱 https://t.co/UJubw4rZaH

— Howie Hua (@howie_hua) October 15, 2026

Image Links

A quick function matching worksheet
Curriculum Tags: MHF4U
https://bsky.app/profile/morrismaths359.bsky.social/post/3mxwlnecvts27

#Mathstoday My year 11s had a go at this lovely Dr Austin task today - Recognising graphs. They not been exposed loads to cubic of reciprocal graphs so did find it hard at time but most of them got there in the end.

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— Miss Morris (@morrismaths359.bsky.social) October 15, 2026 at 1:30 PM

Math Links for Week Ending Oct 9, 2026

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I've not watched the show Traitors but I have started to now that @FrySquared is a contestant on the current season of Celebrity Traitors. Here she explains the math of how she is going to figure out who the traitors are using combinatorics among other things. Thanks to @mathsjem for pointing this out.
Curriculum Tags: MDM4U
https://www.youtube.com/watch?v=twDvxNooI_4

Resource Links

I think that people, in general, not just students, have trouble understanding big numbers. At this link you can try to spend all of Elon Musk's money.
Curriculum Tags: All
https://www.wired.com/story/spend-elon-musk-money/

Big numbers are very hard to develop an intuition for. That's why this little game from @wired.com is so surprising and fun www.wired.com/story/spend-...

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— Dan Finkel (@mathforlove.bsky.social) October 9, 2026 at 2:04 AM

Video Links

It's interesting that trisection does this 
Curriculum Tags: Gr8, MTH1W
https://x.com/Math_files/status/2106593150022357186

Every triangle hides an equilateral triangle, even when the original triangle is completely irregular. Take any triangle. Divide each of its three angles into three equal parts. Now consider the intersections of the adjacent internal angle trisectors. The three intersection points always form an equilateral triangle. No condition is required: The original triangle may be acute, obtuse, scalene or isosceles. Its sides may have any lengths. Its angles may be completely different. Yet the hidden triangle always has three equal sides and three 60° angles. This is Morley’s trisector theorem. Local divisions of three unrelated angles produce perfect global symmetry.

— Math Files (@Math_files) October 4, 2026

I like how he always tries to visualize things
Curriculum Tags:MDM4U
https://x.com/howie_hua/status/2108280168280465592

Okay I MIGHT have found a new way to visually obtain the harmonic mean because I could not find this visual anywhere. Even if it's not new, I'm still really proud of it because it's understandable and valid. https://t.co/RSq0na7X1Y

— Howie Hua (@howie_hua) October 8, 2026

Neat visualization of Fibonacci numbers

Curriculum Tags: All

https://x.com/TheMathFlow/status/2108117450613227797

Fibonacci: From curves to cubes and back to curves. https://t.co/YnxSAaa8KL

— The Math Flow (@TheMathFlow) October 8, 2026

Image Links

@Howie_Hua has focused a lot on mean lately
Curriculum Tags: All
https://x.com/howie_hua/status/2106418942420115798

Mean Girls but it's a movie about Cady learning the different types of mean https://t.co/i8Oii0HDJ3

— Howie Hua (@howie_hua) October 3, 2026

Though I think that kids vape more than they smoke now, this is still good data
Curriculum Tags: All
https://x.com/infobeautiful/status/2108618436574085414

How many people still die of lung cancer after quitting smoking? By age (by reddit user @daysleeperrr) https://t.co/r9skK72m6p

— Information is Beautiful (@infobeautiful) October 9, 2026

Math Links for Week Ending Oct 3, 2026

Featured Links

I appreciate that @KarenCampe brings these old problem sets and makes them new again
Curriculum Tags: All
https://karendcampe.wordpress.com/2026/10/01/october-calendar-problems-4/

The October #ProblemSolving calendar is here!
Enjoy with your students or solve them yourself. Share your thinking here or on the post. #MTBoS #iTeachMath #T3Learns #RecreationalMathhttps://t.co/g9bmVoHrvy

— Karen Campe (@KarenCampe) October 1, 2026

Resource Links

Matrices are no longer in the Ontario Math curriculum but you can still employ them when dealing with 3D vectors
Curriculum Tags: MCV4U
https://help.desmos.com/hc/en-us/articles/49219289186317-Matrices

You can finally get your ducks in a row (and column). Type “matrix” in any Desmos graphing tool to get started. Learn more: help.desmos.com/hc/en-us/art... #iteachmath #mathsky #linearalgebra #matrices

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— Desmos Studio (@desmos.com) October 2, 2026 at 10:14 AM

Make your own suggestion
Curriculum Tags: All
https://x.com/howie_hua/status/2105676830435061899

Since it's spooky season, make a math term scary in the comments. I'll start:

BOOclidean algorithm

— Howie Hua (@howie_hua) October 1, 2026

Video Links

This is a good context for describing what a fraction could represent
Curriculum Tags: Gr7, Gr8
https://x.com/howie_hua/status/2106123154565583126

I have seen a LOT of people overthink this type of problem. Are you overthinking it? pic.twitter.com/bPbH0XdO0Y

— Howie Hua (@howie_hua) October 2, 2026

It's good to understand how different averages are calculated but more, what they represent.
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/2106381257919881275

Happy Mean Girls Day! Let's learn about the arithmetic, geometric, and harmonic mean pic.twitter.com/NIQBA7SbBn

— Howie Hua (@howie_hua) October 3, 2026

Image Links

The printing is so small it's hard to see but this is perfect when you want to show your kids what a useless graph is. Thanks to @JoelBezaire for this one
Curriculum Tags: MDM4U
https://bsky.app/profile/joelbezaire.bsky.social/post/3mwvpim5q7s22

This is the funniest thing I've seen today, possibly ever

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— Tim Carmody (@tcarmody.bsky.social) October 2, 2026 at 10:39 AM

Math Links for Week Ending Sept 25th, 2026

Featured Links

I always like it when I come across a structure that I've never seen before.
Curriculum Tags: All
https://ponderingplanning.wordpress.com/2026/09/09/what-would-happen-if-i-changed-the-question/

New blog post - Explores one of my favourite questions to ask after finishing a worked example: What would happen if I changed the question? wp.me/p9t8DE-s8 #mathschat #MTBoS #ukmathschat #iTeachMaths

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— Paul Rowlandson (@drrowlandson.bsky.social) September 12, 2026 at 3:20 AM

Resource Links

Who doesn't like a good New Order graph?
Curriculum Tags: All
https://bsky.app/profile/theericklee.bsky.social/post/3mvuqrsgjh22j

Math teacher at the gym... on the eliptical machine listening to New Order's Blue Monday and thinking, "I could re-create this animation on @desmos.com." Here is the result www.desmos.com/calculator/k... #ITeachMath

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— Erick Lee (@theericklee.bsky.social) September 19, 2026 at 9:06 AM

A lot of people are talking about the idea of whether AI makes learning math meaningless. Here is one take. I like the following question: "Have we caused this ourselves, with our focus on evaluating the product rather than process? "
Curriculum Tags: All
https://amiealbrecht.com/2026/09/10/should-we-take-the-keys-away-mathematics-in-the-age-of-ai/

Listening to the recent ICM panel discussion on 'What Is Math For in the Age of AI?' got me thinking about a much older question. What do we value in learning mathematics? Read my latest blog post here: amiealbrecht.com/2026/09/10/s...

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— Amie Albrecht (@nomadpenguin.bsky.social) September 9, 2026 at 10:28 PM

 

And here's another take: "Why Do We Need Human Mathematicians Anymore?"

Curriculum Tags: All
https://terrytao.wordpress.com/2026/09/19/why-do-we-need-human-mathematicians-anymore/

Video Links

I like problems that deal with trying to make sense of really big numbers
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/2103578072872255878

Which is greater: 50⁹⁹ or 99! pic.twitter.com/1CyQrFJxJ1

— Howie Hua (@howie_hua) September 25, 2026

Image Links

This seems like an interesting way to extend the ideas of Pythagorean Theorem
Curriculum Tags: Gr8, MTH1W
https://x.com/jamestanton/status/2103385765589712963

A 7-11-13 triangle is a "near-miss Pythagorean triangle." We have
a^2 + b^2 = c^2 + 1
for integer sides a,b,c.
Other examples of such near misses? pic.twitter.com/GheH4776lg

— James Tanton (@jamestanton) September 25, 2026

I think you can ask this of most pieces of mathematical content. That is, it's mostly just "stuff". Exercise for the mind. 
Curriculum Tags: All
https://x.com/jamestanton/status/2102651930468110605

Actually ... let me press on this.

What are three reasons why students need to how to factor integer quadratic expressions? If the answer is that they will need to know this later on, what exactly is the "later on"?

[I am not being solely ornery here. I am happy to teach any… pic.twitter.com/c0JDfjJ8Mg

— James Tanton (@jamestanton) September 23, 2026

Math Links for Week Ending Sept 18th, 2026

Featured Links

Start a discussion, collaboration, or artistic rendering
Curriculum Tags: All
https://www.fractalkitty.com/mathober-2026-prompts/

#iTeachMath yay art!

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— Dr. Maria at Natural Math (@maria-naturalmath.bsky.social) September 11, 2026 at 7:29 AM

Resource Links

I love that there is a mathematical solution to a puzzle based on words
Curriculum Tags: All
https://www.sciencedaily.com/releases/2026/09/260911204910.htm

www.sciencedaily.com/releases/202... Researchers find a Wordle strategy that wins 99% of the time A mathematical strategy that prioritizes information over lucky guesses can solve Wordle 99% of the time #math #maths #MathSky #MTBoS #iteachmath #Wordle #ShannonEntropy #InformationTheory

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— Dawn Del Vecchio (@dawndelvecchio.bsky.social) September 17, 2026 at 5:59 PM

Video Links

He has talked about this before and I like it every time
Curriculum Tags: All
https://x.com/howie_hua/status/2100668449425158173

Teaching tip: consider saying "ask me at least 2 questions" instead of " do you have any questions?" to help normalize questions pic.twitter.com/IeNJbqKec0

— Howie Hua (@howie_hua) September 17, 2026

Image Links

Can your students do this without a calculator?
Curriculum Tags: MTH1W
https://bsky.app/profile/pwharris.bsky.social/post/3mvofmauijc2w

It's time for #MathStratChat! Rules: post your favorite or a clever solution! It's also fun to comment on other's strategies. Tell us about your reasoning. Like/share so others can see! #MathIsFigureOutAble #MathStratChat #MTBoS #ITeachMath #MathEd

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— Pam Harris (@pwharris.bsky.social) September 16, 2026 at 8:30 PM

Math Links for Week Ending Sept 11, 2026

Featured Links

I don't think we can talk enough about dyscalculia
Curriculum Tags: All
https://crpe.org/the-missing-piece-in-math-reform-identifying-and-supporting-students-with-dyscalculia/

Dyscalculia may affect 3–8% of school-age children. So why is it so often overlooked? New CRPE research examines what schools and states can do to better identify and support students. crpe.org/the-missing-... #MathEducation #SpecialEducation

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— Great Lakes Center for Education Research and Practice (@greatlakescenter.bsky.social) September 11, 2026 at 12:03 PM

Resource Links

Solving linear equations as a cross word. I like self checking "worksheets"
Curriculum Tags: MTH1W
https://donsteward.blogspot.com/2012/02/linear-equations-crossnumbers.html

Y9 enjoyed reviewing linear equations in #mathstoday with this from the legendary Don donsteward.blogspot.com/2012/02/line...

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— Tom Gough (@mister-gough.bsky.social) September 10, 2026 at 5:26 PM

Video Links

Linear Algebra in the real world :-) Thanks to @JoelBezaire for this one
Curriculum Tags: All
https://bsky.app/profile/joelbezaire.bsky.social/post/3mv6wgtg53227

Another interesting tidbit to add to the list of Devin Cooley fun facts! 📚 (🎥: TT/natalieweyers07)

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— NHL (Bot) (@notnhl.bsky.social) September 10, 2026 at 4:48 PM

A great example of using circle theorems in a physical way (hint - chord, perpendicular bisector)
Curriculum Tags: MTH1W
https://x.com/pickover/status/2098195726358462802

Mathematical marvels, mysteries, and magic. Geometry and the eternal.

Shock your friends. Determine the center of a drawn circle without a straightedge or compass.

By math educator Tim Brzezinski, @TimBrzezinski, Used with permission. pic.twitter.com/BmJL2Jmu0o

— Cliff Pickover (@pickover) September 10, 2026

Image Links

This is a fun problem that can be done with a little bit of intuitive thinking at just about any grade level that knows how to multiply, but I suppose you could also use systems of equations as well
Curriculum Tags: Gr 7, Gr 8, MTH1W, MPM2D, MFM2P
https://bsky.app/profile/segarrogers.bsky.social/post/3mvajqnhmzs2z

I think the maths historians would probably call this a 'surveyors' problem. Am in the process of making a sheet of them ... unless anyone already has such a thing. (The 40 and the 72 are the areas of the rectangles formed by the respective diagonals). #UKMathsChat #iTeachMath

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— Segar Rogers (@segarrogers.bsky.social) September 11, 2026 at 8:07 AM

Math Links for Week Ending Sept 4, 2026

Featured Links

This is the 9th season of the podcast I produce for OAME. We call it OAMEtalks and the episodes are previews for our monthly webinars. The webinars repeats from our previous face to face conference and are mostly for our OAME members but the first one each season is free to anyone. That is with @TheErickLee on Sept 9th. Registration and other info is at our season 9 link.
Curriculum Tags: All
https://talks.oame.on.ca/season-9

Season 9 of @OAMEcounts OAMEtalks is live at https://t.co/0Tk5NbHctV This season has speakers from #OAME2026 https://t.co/E8Tg164goW featuring@TheErickLee K. Kozlowski, A. Painter, S. Tyrrel, M. Goveia, M. Munk, @KirstDy @webbkyle #MathChat #MTBoS #iTeachMath pic.twitter.com/C4nfTmcVHd

— OAMEtalks (@OAMEtalks) September 2, 2026

[New Podcast] This episode features @TheErickLee previewing their Sept 9th @OAMEcounts FREE webinar "Bigger on the Inside: The Surprising Power of Short Math Routines". More info: https://t.co/E8Tg164goW#MathChat #MTBoS #iTeachMath pic.twitter.com/qpe3t5Nn9N

— OAMEtalks (@OAMEtalks) September 2, 2026

Resource Links

Need to do some problem solving?
Curriculum Tags: All
https://karendcampe.wordpress.com/2026/09/01/september-calendar-problems-4/

September #ProblemSolving calendar is posted!
Enjoy yourself or w/students & share your thinking here or on the post. #MTBoS #iTeachMath #T3Learns #RecreationalMathhttps://t.co/stxyPngpRd

— Karen Campe (@KarenCampe) September 2, 2026

Let anyone who you think may be interested know. Thanks to @johannamath.bsky.social for letting us know about this
Curriculum Tags:All
https://awm-math.org/awards/student-essay-contest/

School is back in session, and that means it's time to start thinking about the 2027 AWM-MfA Student Essay Contest! ✅ Submission portal opens: November 1, 2026 ✅ Essays due: February 1, 2027 More details here: 🔗 awm-math.org/awards/stude.... #AWMMath #MathforAmerica #MfA #StudentEssay

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— The Association for Women in Mathematics (@awm-math.org) September 4, 2026 at 1:42 PM

 

Video Links

A good starter for any class at the beginning of the year
Curriculum Tags: All
https://x.com/howie_hua/status/2095603044251734241

This is the first mathematical task I give to my students. Can you find 1,000 in this grid? pic.twitter.com/xtVsnu7VVU

— Howie Hua (@howie_hua) September 3, 2026

Image Links

I definitely agree. Maybe an area question? Or is that too obvious
Curriculum Tags: All
https://bsky.app/profile/mrcorleymath.bsky.social/post/3mu64a3celc2v

Hey #iteachmath. This was the packaging my new coffee filters came in. There has to be a good math question in here somewhere.

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— Nick Corley (@mrcorleymath.bsky.social) August 28, 2026 at 3:34 PM