Math Links for Week Ending Oct 30, 2026

Featured Links

Though I don't think it is a huge listenership, I am still happy to give voice to everyday teachers on our OAMEtalks podcast. We are midway through season 9 and continue to preview their webinars which are repeats from the most recent OAME conference. 
Curriculum Tags: All

https://talks.oame.on.ca/season-9

[NewPodcast] This episode feat. Sophie Tyrrel & Michele Goveia previewing their Nov 11th @OAMEcounts webinar "ELLs Can Do Math! Supporting & Celebrating ELLs in the Intermediate Division Gr. 7-10" More info: https://t.co/E8Tg164goW #MathChat #MTBoS #iTeachMath https://t.co/ZS2pj9ibzn

— OAMEtalks (@OAMEtalks) November 1, 2026

Resource Links

This is a relatively simple activity for dealing with linear relationships and their equations but it has a nice context and finishes with a challenge creator (I love challenge creators
Curriculum Tags: MTH1W
https://classroom.amplify.com/activity/6a4d80910b19b661e5484d2c

BOOMSHAKALAKA! I rebuilt one of my old Amplify (Desmos) Classroom activities based on NBA Jam. Sometimes improving a lesson isn’t about what we add. It’s about what we give back to students. https://t.co/zrBISD6wLz... https://t.co/klkj7gCWgS #mtbos #math #desmos #amplify https://t.co/asp64ZXTLf

— Kurt Salisbury, Ph.D. (@kurt_salisbury) October 26, 2026

Video Links

Nice logic problem
Curriculum Tags: All
https://bsky.app/profile/howiehua.bsky.social/post/3mz23ldjfak2b

There are 25 Voltorb. You can only race 5 at a time and you have no timer. Can you find the 3 fastest Voltorb in the fewest number of races?

[image or embed]

— Howie Hua (@howiehua.bsky.social) October 29, 2026 at 4:18 PM

Image Links

A nice puzzle for solving equations with integer answers
Curriculum Tags: MTH1W
https://x.com/pickover/status/2116265248785318364

Math. A puzzle for teachers to give their students. (Or, ask people half your age if there is any solution to this, and tell them they have half a minute to solve it.) https://t.co/BE8AAouPOb

— Cliff Pickover (@pickover) October 30, 2026

A Venn diagram for hockey fans
Curriculum Tags: MDM4U
https://x.com/JoshuaBarzon/status/2114004432186716380

What a Venn diagram! https://t.co/1bsdOs4M1J

— Josh Barzon (@JoshuaBarzon) October 24, 2026

Math Links for Week Ending Oct 24th, 2026

Featured Links

This reminds me that a Desmos activity doesn't need a lot of bells and whistles to be useful. Thanks to @MaryBourassa.bsky.social for this one
Curriculum Tags: MHF4U
https://classroom.amplify.com/activity/5623e5c61dd697a010ec19cb

Resource Links

Do you want some math-centric fun things designed by some of the best math/science communicators on the web? Look no further
Curriclum Tags: All

https://mathsgear.co.uk/pages/about-us

Did you know that the Maths Gear newsletter is still written by a human?! I am that human! and if you want to receive the newsletter which comes out on average once a month, you can do so here mathsgear.co.uk/pages/newsle... The next one is scheduled for today at 3:33pm, so you have time! 💗

[image or embed]

— Ayliean (@ayliean.bsky.social) October 23, 2026 at 6:38 AM

Video Links

I have seen this as a static image but I think this might be the first video version that I can remember
Curriculum Tags: MCR3U, MHF4U
https://x.com/Math_files/status/2113322273512055129

When functions begin to dance, even the world’s greatest dancers lose the rhythm of their steps. https://t.co/eNxJekdoPa

— Math Files (@Math_files) October 22, 2026

I have said it before but I like talking about this issue.
Curriculum Tags: MTH1W, MPM2D
https://x.com/howie_hua/status/2113386955262267394

Four arguments for why 0.9 repeating equals 1 https://t.co/3qJCuIWoB9

— Howie Hua (@howie_hua) October 22, 2026

Nice visualization of powers of 3
Curriculum Tags: MTH1W, MPM2D, MCR3U
https://x.com/fermatslibrary/status/2113588733324759122

Powers of 3 https://t.co/obphgRUv7N

— Fermat's Library (@fermatslibrary) October 23, 2026

Image Links

Who doesn't love Pythagorean Tripples in the calendar?
Curriculum Tags: All
https://bsky.app/profile/mathnerd1729.bsky.social/post/3mykzrjqhwc2k

I missed it the previous time it happened due to being busy with a close relative's birthday, so I had to make sure to acknowledge it earlier this time otherwise I'd definitely get my nerd card revoked! #MathSky #Mathematics #PythagoreanTheorem #MathChat #MathsChat

[image or embed]

— Math Nerd 1729 (@mathnerd1729.bsky.social) October 23, 2026 at 4:36 PM

This can be scary :-)
Curriculum Tags MDM4U
https://bsky.app/profile/curiouspolymath.bsky.social/post/3myipfi4tqc2w

#mathsky

[image or embed]

— Pete Wung The Curious Polymath (@curiouspolymath.bsky.social) October 22, 2026 at 6:25 PM

 

Math Links for Week Ending Oct 9, 2026

Featured Links

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-...

[image or embed]

— 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 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

[image or embed]

— 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

[image or embed]

— 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...

[image or embed]

— 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!

[image or embed]

— 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

[image or embed]

— 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

[image or embed]

— 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

[image or embed]

— 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...

[image or embed]

— 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)

[image or embed]

— 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

[image or embed]

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

Math Links for Week Ending Aug 28th, 2026

Featured Links

The power of functions and inequalities
Curriculum Tags: MCR3U, MHF4U
https://youtu.be/NbrvuXib9mk

forgot to share this: I made a tutorial on how to draw anything with a single equation/inequality. youtu.be/NbrvuXib9mk I tried animating it all in @desmos.com but gave up 1 minute into the video and used Davinci Resolve... it was fun to start improving my Desmos animation skills though! #iteachmath

[image or embed]

— Mathemagicland (@mathemagicland.bsky.social) August 28, 2026 at 12:49 PM

Resource Links

Double percentages are always fun
Curriculum Tags: Gr7, Gr8, MTH1W
https://docs.google.com/presentation/d/1nG57nIzY7ZD_kQzsa2gDs9eJMDLzttZcHf4ZKMfKmp4/edit?slide=id.geb5d854f2a_0_0#slide=id.geb5d854f2a_0_0

In #MathsToday, "Which Deal is Better" sparked discussion about how percentages stack, and whether you can just choose a starting value arbitrarily (Yes!) docs.google.com/presentation... (Sorry - don't remember the source) 3/4

[image or embed]

— Carl Brandt Long (@carlblong.bsky.social) August 28, 2026 at 4:27 PM

Video Links

I love this video because it's a great example of how multiple components create complex motions. I think it's a great example of the ideas when combining vectors 
Curriculum Tags: MCV4U
https://x.com/PhilosophyOfPhy/status/2093341582137385462

Genius is the ability to independently arrive at and understand concepts that would normally have to be taught by another person.

- Immanuel Kant pic.twitter.com/3DcgbpUDYO

— Philosophy Of Physics (@PhilosophyOfPhy) August 28, 2026

I think this would be interesting to do with students under the guise of working with roots and calculations

Curriculum Tags: MTH1W
https://www.youtube.com/watch?v=-mXaU3N9e8Y

Image Links

A great Calculus meme
Curriculum Tags: MCV4U
https://x.com/howie_hua/status/2093444091271086441

Can you figure it out? pic.twitter.com/GQP4DOQFlT

— Howie Hua (@howie_hua) August 28, 2026

Fun with numbers 
Curriculum Tags: All
https://x.com/fermatslibrary/status/2093465647938154778

Take the digits of 197 and start a sequence where each term is the sum of the previous three:

1, 9, 7, 17, 33, 57, 107, 197

The original number turns up on its own. This is what defines a Keith number - a rare kind, named after Mike Keith, the mathematician who first remarked… pic.twitter.com/uPngkSEi2q

— Fermat's Library (@fermatslibrary) August 28, 2026

More number fun
Curriculum Tags: All
https://x.com/pickover/status/2093032310526333056

Mathematics.

This is a "Soul-Mate Number Pair." They love each other so much that they contain fragments of one another, forever bonded until the end of time. pic.twitter.com/is3E0qcIPF

— Cliff Pickover (@pickover) August 27, 2026

Some fun with "lines" of best fit
Curriculum Tags: MDM4U
https://x.com/infobeautiful/status/2093350835132436548 

Curve fitting methods & what they say https://t.co/cjbZOiC107 pic.twitter.com/hEhtx7HMCq

— Information is Beautiful (@infobeautiful) August 28, 2026

Math Links for week Ending July 30, 2026

Featured Links

I love that most of these little interactives don't necessarily have direct connections to the curriculum but I appreciate that (among other things) they say the "Tools are geared towards curiosity" and "Most tools don't explain themselves on purpose.". That makes them great for exploring. Be sure to read the link in the post for a primer but go directly to the interactives by the link below
Curriculum Tags: All
https://www.inquiries.link/

I wrote a post about the embedded interactives on my site: www.fractalkitty.com/about-intera... #mtbos #indieWeb #mathLearning #iTeachMath #iteachStem #mathInquiry #p5js #svelte #d3js

[image or embed]

— Fractal Kitty (@fractalkitty.com) July 31, 2026 at 6:45 PM

Resource Links

As an administrator, part of my job is evaluating staff. One of my go to asks is for teachers to work on how they both ask and answer questions of students (I am constantly suggesting that if students ask "is this right?" to always answer with "Tell me why you think it's right" as well as helping students think more like scientists (for both math and science classes). Regardless, here are some other ideas
Curriculum Tags: All
https://www.edutopia.org/article/3-ways-give-feedback-math-teachers

You don’t have to be a math teacher in a past life to give good feedback to your school’s educators. ➗ Try these 3 approaches that help school leaders give math teachers valuable information about how to improve their teaching practices. #SchoolLeaders #ITeachMath

[image or embed]

— Edutopia (@edutopia.org) July 31, 2026 at 4:43 PM

I have been thinking about hosting a local viewing of this but this might be more convenient 
Curriculum Tags: All
https://watch.eventive.org/countedout/play/6a4e9346d83b4f14e2219f79

Have you seen Counted Out? Up til now it's only been available at watch parties and now you're invited. Here's your chance! RSVP to watch watch.eventive.org/countedout/p... #MathIsFigureOutAble #MathChat #MTBoS #ITeachMath #MathEd #Mathematics

[image or embed]

— Pam Harris (@pwharris.bsky.social) July 31, 2026 at 3:00 PM

Play Hexsum for free once a day
Curriculum Tags: All
https://hexsumgame.com/daily-2 

Try out today's daily HexSum puzzles! hexsumgame.com/daily-2 Also, support this endeavor with Pro account and unlock more modes and options. It's a one-time purchase of $7. Cheaper than a breakfast bagel and coffee up here in these parts. A 🐝 mode is coming :) -- #HexSumGame #gamedev #mathsky

[image or embed]

— Math Misery (@mathmisery.bsky.social) July 30, 2026 at 8:41 PM

Video Links

This is fun
Curriculum Tags: All
https://x.com/themathpulse/status/2082915776454066599

Mathematics Coming Alive

Credit: alanthebecker pic.twitter.com/kch78jSVKg

— Math Pulse (@themathpulse) July 30, 2026

Permutations with repeats, nice. 
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/2082134978582991335

How many permutations are there of the letters of the word Rattata? pic.twitter.com/ML9eCdWktc

— Howie Hua (@howie_hua) July 28, 2026

I'm glad he clarified that these were not likely independent events and also liked that he showed the total probability should add to 100%.
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/2083345246675722676

What's the probability of me catching a rifle and making a free throw? pic.twitter.com/kUQgh68ZzW

— Howie Hua (@howie_hua) July 31, 2026

Image Links

There is something about this question that I like. You could also ask students to come up with their own similar question.
Curriculum Tags: MTH1W, MPM2D
https://x.com/farman4x/status/2083175281041481877

Thousands of wrong answers.👀

One simple question.❔

Can you get it right? pic.twitter.com/0CYMVSFR8Q

— farmanX (@farman4x) July 31, 2026

Math Links for Week Ending July 3rd, 2026

Featured Links

I always appreciate the work that @DavidButlerUoA does, especially when he puts it all together and shares. In this case, constructions using 2 sides of a ruler. I don't know that this fits into any particular curriculum and that's the beauty of it. It starts with some introductory constructions and quickly ramps up.  
Curriculum Tags: All
https://davidkbutler.xyz/2026/06/25/two-sided-ruler-constructions-1-introduction/

#MathSky Finally, I've updated the first post in the series with a link to the playlist of videos and an index of links to every individual construction in all eight posts. Now you (and I) can find anything I've written about two-sided ruler constructions anytime. davidkbutler.xyz/2026/06/25/t...

[image or embed]

— David K Butler (@davidkbutler.bsky.social) July 3, 2026 at 8:25 PM

Resource Links

Another one about constructions. Though this isn't about how to actually do constructions (you might like my videos on that), it's a nice little set of questions to make specific constructions and then to check them electronically with this site. 
Curriculum Tags: All
https://www.transum.org/software/SW/Starter_of_the_day/Students/Constructions.asp

Mixed media learning (sounds good). Students complete construction exercises using a pencil, ruler and compasses, then measure a length on their construction. They type it online, which awards the mark if within a given tolerance. www.transum.org/Intro/?ID=403 #mathsresources #mathstoday

[image or embed]

— transum.bsky.social (@transum.bsky.social) July 3, 2026 at 5:57 AM

Video Links

I always appreciate unconventional methods of doing things. 
Curriculum Tags: Gr7, Gr8, MTH1W
https://x.com/howie_hua/status/2072699932998340865

This fraction comparison strategy is underrated pic.twitter.com/94Kc9LZXvi

— Howie Hua (@howie_hua) July 2, 2026

Image Links

It took me many years (and a student to tell me) to realize I had to get to know my students. I wish I had known sooner. 
Curriculum Tags: All
https://bsky.app/profile/camatsumoto10.bsky.social/post/3mprge6pwec2z

@camatsumoto10.bsky.social

[image or embed]

— Carol Matsumoto (@camatsumoto10.bsky.social) July 3, 2026 at 4:50 PM

Math Links for Week Ending June 19, 2026

Featured Links

I have mixed feelings about timed tests, but they can be useful for motivated students. Regardless I love this interface with the duelling timers and all the options you can use for the questions themselves. And there is not just math but biology, physics, chemistry, computer science and even english.
Curriculum Tags: All
https://classduels.com/

Here's something I've been working quite hard on recently: classduels.com/maths/ A Maths game featuring: - two-player (split screen, can be done on a interactive whiteboard) and single-player modes - 50+ topics across KS3-KS5 - a version for the Australian curriculum: classduels.com/maths/au/ 😉

[image or embed]

— Nathan Day (@nathanday.bsky.social) May 17, 2026 at 3:41 PM

Resource Links

Patterns? Of course it does
Curriculum Tags: All
https://studyfinds.com/van-goghs-brushstrokes-may-have-math-fingerprint/

studyfinds.com/van-goghs-br... Strokes of Genius: Van Gogh’s Paintings May Have a Mathematical Fingerprint #Math #Maths #MathSky #iteachmath #VanGogh #fractaldimension

[image or embed]

— Dawn Del Vecchio (@dawndelvecchio.bsky.social) June 18, 2026 at 1:42 PM

Lots of great problems, now available for free. Thanks to @EliLuberoff for pointing this out.
Curriculum Tags: All
https://www.citizenmath.com/

Video Links

Pokemon and expected value
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/2067976421369368898

Which Pokémon move will do more damage per turn on average: Flamethrower or Fire Blast? Let's learn about expected value. pic.twitter.com/YzTxkYyGT2

— Howie Hua (@howie_hua) June 19, 2026

Image Links

Something to use in an exponential lesson about extrapolation
Curriculum Tags: MCR3U, MHF4H
https://bsky.app/profile/xkcd.com/post/3moj6x2c3fk2x

Messi xkcd.com/3260/

[image or embed]

— Randall Munroe (@xkcd.com) June 17, 2026 at 4:51 PM

Great for working with roots and simplifying 
Curriculum Tags: MTH1W, MPM2D
https://bsky.app/profile/percybuttons3.bsky.social/post/3mok5mpmbp222

Math Links for Week Ending June 12, 2026

Featured Links

I agree. The community on Twitter was great. It was some of the best self directed PD I had experienced. Plus I "met" so many new like minded people (sometimes even in person). It is unfortunate that that platform waned in that capacity. I still post there and look from time to time but I love how the community on Bluesky, although small, is starting to fill that hole. 
Curriculum Tags: All
https://bsky.app/profile/mathowitz.bsky.social/post/3mo433ox6222j

Why am I on Bluesky? Because we used to have #mtbos on twitter. Then Twitter turned into X which turned into a steaming pile of vitriol... and I had to leave. A decent amount of us landed here, and even though it's not the same, it's better than nothing.

— Carl (@mathowitz.bsky.social) June 12, 2026 at 11:38 AM

The #math community seems to be growing here and becoming more active. I have presented on how to get the most of being in a community like this many times and here are my tips to grow this PLN and make it useful for educators. Bonus Tip - Use the Feeds: #MathChat #MTBoS #iTeachMath #MathSky

[image or embed]

— DavidPetro314 (@davidpetro314.bsky.social) November 23, 2024 at 7:32 PM

Resource Links

Somehow I missed the May "classic" NCTM calendar.
Curriculum Tags: All
https://karendcampe.wordpress.com/2026/05/01/may-calendar-problems-4/

The May #ProblemSolving Calendar is here! Solve yourself or w/your students & share your working-out thoughts here or on the blog.

*special theme* -- Function Composition #Algebra2 #precalculus#iTeachMath #MTBoS #T3Learns #RecreationalMath #MathsTodayhttps://t.co/Z5IhEWoDqP

— Karen Campe (@KarenCampe) May 1, 2026

I think we are going to start seeing a lot of people sharing their @DesmosStudio Notebook pages now that they are available to be created. 
Curriculum Tags: MTH1W
https://www.desmos.com/notebook/syajf6ddqw/view

Here's a #Desmos notebook I made to support one of my Algebra 2 lessons next September. I think these will be really useful as "digital manipulatives" that students can play with to build intuition. #EduSky #ITeachMath www.desmos.com/notebook/sya...

[image or embed]

— Darth Calculus 🏳️‍🌈 (@darthcalculus.bsky.social) June 11, 2026 at 8:52 AM

Video Links

I think this would be a good starter as a catalyst to talk about sums of series.
Curriculum Tags: MCR3U
https://x.com/howie_hua/status/2065493735132086507

You are not going to believe what (1²+2²+3²+...+100²)/(1+2+3+...+100) simplifies to... pic.twitter.com/N59mlCaU5Y

— Howie Hua (@howie_hua) June 12, 2026

Image Links

Here is a fun little puzzle when your students are starting to learn algebra.
Curriculum Tags: MTH1W, Gr8
https://bsky.app/profile/pwharris.bsky.social/post/3mo2fvrkhdk2z

#TryThisThursday It's factor puzzle time! The one on the left shows the relationships to apply to the one on the right. What goes in the blanks? How do you know? #MathIsFigureOutAble #MTBoS #ITeachMath #MathEd

[image or embed]

— Pam Harris (@pwharris.bsky.social) June 11, 2026 at 7:46 PM

Introducing or reviewing Function notation? This might be a good puzzle
Curriculum Tags: MCR3U, MCF3M
https://bsky.app/profile/mathsadvance.bsky.social/post/3mo5xdr2x3k2d

How long to solve? Given that f(x) is linear (ax + b) express 'b' in terms of 'a'. #MathSky #MathsToday #ProblemSolving

[image or embed]

— Maths Advance (@mathsadvance.bsky.social) June 13, 2026 at 5:36 AM

Math Links for Week Ending June 5th, 2026

Featured Links

Perfect for adding vectors (or even you could connect it to adding integers). Either way, as someone who is a graduate of physics, this would be totally fun.
Curriculum Tags: MCV4U
https://x.com/ScienceExpand/status/2060936498481115603

The Crazy physics of launching at 80 km/h from a truck already moving 80km/h pic.twitter.com/wlhwfgUHo5

— Science Magazine (@ScienceExpand) May 31, 2026

Resource Links

Some self checking resources on Similar Triangles
Curriculum Tags: Gr7, Gr8, MTH1W
https://www.transum.org/Maths/Activity/Similar/Triangles/

A new set of self-marking exercises called Similar Triangles has been created. It builds on the practice already offered by the Similar Shapes exercise, exploring triangle similarity in more detail. www.transum.org/Intro/?ID=1175 #mathsresources #mathschat #mathstoday #mathchat

[image or embed]

— transum.bsky.social (@transum.bsky.social) June 5, 2026 at 5:57 AM

Video Links

You can never have enough ways to explain division with integers
Curriculum Tags: Gr7, Gr8, MTH1W
https://x.com/howie_hua/status/2061935439423177007

Here's how I would explain why a negative divided by a negative equals a positive to kids pic.twitter.com/HdNWw92xhG

— Howie Hua (@howie_hua) June 2, 2026

Image Links

I like this one because it could be used at any grade level
Curriculum Tags: All
https://bsky.app/profile/pwharris.bsky.social/post/3mnix7j42ck23

#TryThisThursday If one doesn't belong, how are the other three related? Do it for each quadrant! what the other three have in common! #MathIsFigureOutAble #MTBoS #ITeachMath #MathEd

[image or embed]

— Pam Harris (@pwharris.bsky.social) June 4, 2026 at 9:08 PM

Math Links for Week Ending May 29th, 2026

Featured Links

A couple of links to help students with exceptionalities. 
Curriculum Tags: All
https://autismspectrumnews.org/beyond-barriers-making-mathematics-accessible-for-autistic-students/
https://www.edutopia.org/article/supporting-neurodivergent-students-math

Hands-on math strategies can help autistic students build confidence, problem-solving skills, and greater independence. #Autism #MathEducation #SpecialEducation #Neurodiversity 📰 Read the article: https://autismspectrumnews.org/beyond-barriers-making-mathematics-accessible-for-autistic-students/

[image or embed]

— Autism Spectrum News (@autismspectrumnews.bsky.social) May 27, 2026 at 1:01 PM

These 5 instructional strategies can help you create a more supportive math classroom experience for neurodivergent learners! ✖️➕ #MathSky #ITeachMath #EduSky

[image or embed]

— Edutopia (@edutopia.org) May 28, 2026 at 7:39 PM

Resource Links

Need some Frustrum practice and resources? Look no further
Curriculum Tags: MTH1W
https://www.transum.org/Maths/Exercise/Frustum/

Well every day is a school day! It was while preparing this online exercise on frustums that I learned that there is more than one formula or method that can be used to find the volume. I live and learn. www.transum.org/Intro/?ID=1172 #mathsresources #mathschat #mathstoday #mathchat

[image or embed]

— transum.bsky.social (@transum.bsky.social) May 28, 2026 at 5:57 AM

Video Links

Last week @DesmosStudio introduced Desmos Notebook. Here's a brief mini tutorial on adding an existing graph.
Curriculum Tags: All
https://bsky.app/profile/desmos.com/post/3mmz67vks6s2j

Have you checked out Desmos Notebook yet? Importing your favorite Desmos graphs into Notebook is a great way to get started. What question should we answer next? #mathsky #iteachmath #iteachphysics

[image or embed]

— Desmos Studio (@desmos.com) May 29, 2026 at 2:30 PM

Those are like Peewee Herman cards :-)
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/2060125131226361994 

I have two shuffled 52 card decks. If I reveal one card from each deck at the same time and I exhaust the decks, what's the probability of flipping the same exact card at least once? pic.twitter.com/coh3c8fLNK

— Howie Hua (@howie_hua) May 28, 2026

I love how the straight line motion produces the circular motion
Curriculum Tags: All
https://x.com/Rainmaker1973/status/2060403934246670336 

Each sphere is moving in a straight line, but the final motion is circularpic.twitter.com/nK4GjYXlZm

— Massimo (@Rainmaker1973) May 29, 2026

Image Links

I'm glad someone else was able to figure out what it was saying, cuz I couldn't
Curriculum Tags: MTH1W
https://bsky.app/profile/segarrogers.bsky.social/post/3mmwfpnfm7c2t

So I'm reading about the origins of algebra ... and I find this from Abū Kāmil in about 900CE ... and of course Kāmil's algebra (al-jabr!) could solve this. Pretty amazing really. #UKMathsChat #iTeachMath

[image or embed]

— Segar Rogers (@segarrogers.bsky.social) May 28, 2026 at 12:07 PM

Math Links for Week Ending May 15th, 2026

Featured Links

This is a neat video from the staff of the  Harvard Math dept. 
Curriculum Tags: All
https://www.youtube.com/watch?v=VI5fUKPK2No

Resource Links

This looks interesting. This part of the description caught my eye "....This training will be useful for dyslexia assessors who want to assess for dyscalculia.."
Curriculum Tags: All
https://www.patoss-dyslexia.org/Live-Webinars/development-and-understanding-of-mathematical-skills-within-primary-and-secondary-education/16299?OccId=22276

Join us on Wednesday 20 May for a live CPD webinar with Alison Tallentire, exploring how mathematical skills develop across primary and secondary education. 👉 Book: www.patoss-dyslexia.org/Live-Webinar... #MathsEducation #Dyscalculia #SpLD #PrimaryMaths #SecondaryMaths #InclusivePractice

[image or embed]

— Patoss (@patoss-dyslexia.bsky.social) May 15, 2026 at 7:15 AM

Video Links

@Howie_Hua continues to do some Pokemon themed math, this time with combinatorics. 
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/2055022858578055532

How many different teams of 6 Eeveelutions are there when there are 8 Eeveelutions? pic.twitter.com/VHkgPcXJll

— Howie Hua (@howie_hua) May 14, 2026

Image Links

Looking for a discussion prompt dealing with proper and improper fractions?
Curriculum Tags: Gr7, Gr8, MTH1W
https://bsky.app/profile/mathsvault.bsky.social/post/3mlvkad2u3v2h

Discuss — Add And Subtract Improper Fractions And Mixed Numbers #maths #mathsteacher #UKMathsChat #GCSEMaths #MathsChat #Discussion #MathsDiscussion #TalkTasks

[image or embed]

— Jon @ The Maths Vault (@mathsvault.bsky.social) May 15, 2026 at 10:30 AM

Math Links for Week Ending May 1, 2026

Featured Links

It is OAME2026 our annual Ontario Association for Mathematics Education annual conference. I presented 3 sessions this year. They can all be accessed at the link below
Curriculum Tags: All
http://bit.ly/oame-petro

I just finished My session on resources for teaching #quadratics in #math class at the @OAMElearns #OAME2026 conference. You can get the slides here:https://t.co/indBLptcoZ#MathChat #iTeachMath #MTBoS pic.twitter.com/noUx1lXUh4

— David Petro (@davidpetro314) April 30, 2026

My second session was about how to build @Amplify classroom tasks (without CL) at the @OAMElearns #OAME2026 conference:https://t.co/indBLptcoZ#MathChat #MTBoS #iTeachMath pic.twitter.com/I9cD8wqlsj

— David Petro (@davidpetro314) May 1, 2026

My third session was showing gr 7&8 #math teachers all the great premade @Amplify classroom tasks at the@OAMElearns #OAME2026 conference: https://t.co/indBLptcoZ #MathChat #MTBoS #iTeachMath pic.twitter.com/bIeHk820Cy

— David Petro (@davidpetro314) May 1, 2026

Resource Links

OAME - Great culminating activity for gr 9 math 
Curriculum Tags: MTH1W
https://drive.google.com/drive/folders/11Ofdgs5nGW4MITiB4ybyiIbuCD7DSKz4

Modelling #math by creating a Food Truck from Elysabeth Barnes at @OAMElearns #OAME2026 for grade 9 MTH1W. Get the folder of resources here:https://t.co/U3DBXYmbXY#MathChat #MTBoS #iTeachMath pic.twitter.com/IutecPjiHx

— David Petro (@davidpetro314) April 30, 2026

OAME - A great reminder of how important starters are. 
Curriculum Tags: All
https://docs.google.com/presentation/d/17wmTZGoxa-F-TU51b-uICcMzMn1Ksv5IKyWgn_odZ14/edit?slide=id.p#slide=id.p

It's @theericklee at #OAME2026 coming from the east coast to talk about the power of the first 5 min of class. With references to lots of #math class favs & including other curated math resources, check them all out here:https://t.co/OIKhSka87Y#MathChat #MTBoS #iTeachMath pic.twitter.com/cawZJxgcGi

— David Petro (@davidpetro314) April 30, 2026

OAME - Ideas that exploit AI for useful purposes in math class
Curriculum Tags: All
https://docs.google.com/presentation/d/1n-FZXTKSv6E4pG-VSgmJ0DDG8Y0qwCpT1VOFJvMwIeg/edit

Getting tips on using Google's Gemini Suite in #math class from @robinmath3 at the @oamelearns #OAME2026 conference.https://t.co/N0CSQwIVwP#MathChat #MTBoS #iTeachMath pic.twitter.com/N1zNJ5X7fo

— David Petro (@davidpetro314) April 30, 2026

OAME - Sound advice from Dr. Pam Seda
Curriculum Tags: All
http://tinyurl.com/SedaMay1

Lot's of great equity based resources shared by Dr. Pam Seda at the @OAMElearns #OAME2026 Conference Day 2 Keynotehttps://t.co/7hWJ5jVRLj#MathChat #MTBoS #iTeachMath pic.twitter.com/L6jMZ5ZRrj

— David Petro (@davidpetro314) May 1, 2026

OAME - Great session on how to turn regular rich problems into something better (and useful in a Thinking Classroom)
Curriculum Tags: All
https://www.kylewebb.ca/oame26

Great session from @webbkyle & @KirstDy on how to remix an already rich problem at the @OAMElearns #OAME2026 conference. They also shared some great problem solving resources:https://t.co/MCjVL2kWDe#MathChat #MTBoS #iTeachMath pic.twitter.com/am5ZHi0mjM

— David Petro (@davidpetro314) May 1, 2026

OAME - Free resources from @PWHarris
Curriculum Tags: All
 https://www.mathisfigureoutable.com/big

Free resource from @pwharris on numeracy strategies https://t.co/6vYAYMDn0k#OAME2026 pic.twitter.com/KY2FtUP2In

— David Petro (@davidpetro314) April 30, 2026

Video Links

A nice simple visualization of this classic probability problem. 

Curriculum Tags: All
https://x.com/howie_hua/status/2048452433895129532

This is a very common misconception in statistics:

If 1% of a population has a disease and the tests have a 5% chance of giving a false positive, what's the probability of having the disease given that we tested positive?

The answer is NOT 95%. It's actually way less. pic.twitter.com/HoLm7zOTjB

— Howie Hua (@howie_hua) April 26, 2026

More Pokemon probabilities
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/2049585872966996285

If there is a 1/4096 shiny encounter rate, how many encounters do we need to have a 99% chance of encountering a shiny Pokémon? pic.twitter.com/z3PFlBZC4m

— Howie Hua (@howie_hua) April 29, 2026

Image Links

OAME - Great stuff from @PWHarris
Curriculum Tags: All
https://x.com/davidpetro314/status/2049841170008678512

"My job as an educator is to build kids brains, not to have them get answers to math questions" - @pwharris is the opening keynote at the @OAMEcounts #OAME2026 annual conference pic.twitter.com/ceG2En8q55

— David Petro (@davidpetro314) April 30, 2026

OAME - That's definitely the reason
Curriculum Tags: All
https://x.com/davidpetro314/status/2049847083906027563

What is the purpose of teaching math? - @pwharris

To develop mathematical reasoning #OAME2026 pic.twitter.com/0QMG97e8Ls

— David Petro (@davidpetro314) April 30, 2026