Math Links for Week Ending Jan 2nd, 2026

Featured Links

I always appreciate teachers who share what they've found on the web. Here's a bunch of resources and pile of people to follow. I've definitely added a few to my list
Curriculum Tags: All
https://mathhombre.blogspot.com/2025/12/playful-math-carnival-183.html

#playfulmath carnival 183! mathhombre.blogspot.com/2025/12/play... Writing on teaching, fun math, puzzles, games, art...

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— John Golden (@johngolden.bsky.social) December 26, 2025 at 9:22 PM

Resource Links

I'm always grateful for these classic Calendar problems. Happy New Year
Curriculum Tags: All
https://karendcampe.wordpress.com/2026/01/01/january-calendar-problems-4/

Happy new #ProblemSolving year! The January Calendar of #math problems is posted!!
Enjoy them w/your students or yourself--please share your thinking & solutions here or on the post. #iTeachMath #MTBoS #T3Learns #RecreationalMathhttps://t.co/huMUVjxa5G

— Karen Campe (@KarenCampe) January 1, 2026

Video Links

I never say no to a good Fibonacci animation
Curriculum Tags: All
https://x.com/truthache68/status/2006797347557355950

Fibonacci Sequence—each number is the sum of the two preceding ones (e.g., 5 + 8 = 13). Is this proof of intelligent design? pic.twitter.com/4HRdAusDWa

— truthache (@truthache68) January 1, 2026

Image Links

Everyone knows I'm a sucker for a good tesselation
Curriculum Tags: All
https://note.com/tairu_mk/n/n0f67f6db98e1

Miko Imura/Hirono Tyle shared a blogpost on this cool heptagon based #tessellation. note.com/tairu_mk/n/n... (in Japanese, but translates well.)

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— John Golden (@johngolden.bsky.social) January 2, 2026 at 6:32 PM

Made in Excel? What the....
Curriculum Tags: All
https://bsky.app/profile/helsig.bsky.social/post/3mbf7uou43225

Prompt: One color, one shape. Irregular hexagons with rotation and scaling. Made in Excel. #genuary #genuary2026 #genuary1

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— Daniel Wilson (@helsig.bsky.social) January 1, 2026 at 3:30 PM

Math Links for Week Ending Dec 26, 2025

Featured Links

Who doesn't want some free resources?
Curriculum Tags: All
https://www.mathisfigureoutable.com/blog/12-days-of-christmas-math-is-figureoutable

That’s a wrap! 🎄
12 days of FREE resources to help students reason instead of memorize strategies, routines, and a reasoning workshop.
Catch them all here 👉 https://t.co/KBlampybXr#MathIsFigureOutAble #MTBoS #MathEd pic.twitter.com/OnGWjOAkyS

— Pam Harris (@pwharris) December 20, 2025

Resource Links

These are some big names in mathematics communication
Curriculum Tags: All
https://www.ams.org/journals/notices/202601/noti3285/noti3285.html

Reaching the Masses: Six Authors on Public Outreach [about Mathematics]

A Zoom conversation with:

Keith Devlin @MarcusduSautoy
Jordan Ellenberg
Sarah Hart @JohnAllenPaulos@stevenstrogatzhttps://t.co/34Ihrzpu40

PDF: https://t.co/dXmPesT92u pic.twitter.com/1eoecjzFFW

— Steven Strogatz (@stevenstrogatz) December 18, 2025

Video Links

A proof using triangle properties. 
Curriculum Tags: Gr8, MTH1W
https://x.com/howie_hua/status/2001750457216307290

One of the coolest math facts that I know is that the only circle that fits perfectly in a 3-4-5 right triangle has an area of pi.

Here's how we can prove this. pic.twitter.com/heVZTZon9a

— Howie Hua (@howie_hua) December 18, 2025

Working with repeating decimals? Then this may be fun
Curriculum Tags: Gr8, MTH1W
https://x.com/howie_hua/status/2002773397823201310

Can we all share a fun math fact we will never use in our life but we still think is cool? pic.twitter.com/DRMOFBugGP

— Howie Hua (@howie_hua) December 21, 2025

I love the connection to e. 
Curriculum Tags: MDM4U, MHF4U

https://x.com/howie_hua/status/2003510194555486736

What's the probability of no one grabbing their own name when picking secret Santas? (Spoiler alert: e appears here!) pic.twitter.com/kacvsy9vgb

— Howie Hua (@howie_hua) December 23, 2025

Image Links

A great class starter
Curriculum Tags: All
https://x.com/pickover/status/2001855140027077025

Mathematics. Perception. Geometry.

This problem is fascinating, because different humans seem to give different answers, and different AI entities seem to give different answers. pic.twitter.com/RJnXP9H4bO

— Cliff Pickover (@pickover) December 19, 2025

There is data everywhere
Curriculum Tags: MDM4U
https://x.com/YOW_Weather/status/2004169734636372053

#Ottawa white Christmases over the past 50 years (2025 edition) #YowWx #OttWeather #OttNews pic.twitter.com/5ROkB26pQo

— Ottawa Weather Records🌤 (@YOW_Weather) December 25, 2025

As someone who is over 55, I am not sure if I agree :-)
Curriculum Tags: MDM4U
https://x.com/SavagelyAvg/status/2004234582057796015

pic.twitter.com/0dXgAiD2zB

— SAVAGELY Average 🇺🇸 ✝ (@SavagelyAvg) December 25, 2025

Math Links for Week Ending Dec 19th, 2025

Featured Links

Who among us have no seen math students do this on the regular in class?
Curriculum Tags: All
https://x.com/mariana057/status/2001374920073449837

I don't always clear my calculator...

but when I do, I hit both 'C' and 'CE' a bunch of times because I don't know exactly what they do.

— mariana Z (@mariana057) December 17, 2025

Resource Links

Whether you are actually studying sums of series or just having students work with number patterns, this is a good way to go about it. 
Curriculum Tags: MTH1W, MCR3U
https://fawnnguyen.substack.com/p/find-the-smallest-sum





Flex you or your student's @Desmos muscles 
Curriculum Tags: All
https://bsky.app/profile/desmos.com/post/3maen3ia6ak27

Have some free time over the next couple weeks? You have less than a month to submit your work to the Desmos Art Contest! Head to desmos.com/art for more information, and be sure to hit submit before January 15th, 2026. #mathsky #iteachmath

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— Desmos Studio (@desmos.com) December 19, 2025 at 4:28 PM

Video Links

Some nice trig related visuals
Curriculum Tags: MCR3U, MCF3M
https://x.com/InterestingSTEM/status/2000944015404056826

Trigonometric patterns explained.pic.twitter.com/eF4JBwh86J

— Interesting STEM (@InterestingSTEM) December 16, 2025

I like how in this question you could use systems of equations but you could also use logic
Curriculum Tags: MPM2D, MFM2P
https://x.com/howie_hua/status/1999526011814211709

What is the weight of the dog, cat, and bunny? pic.twitter.com/1dcYFlZDKa

— Howie Hua (@howie_hua) December 12, 2025

This is a good example of poor knowledge of percents. What would you say to a student who has this misconception.

Curriculum Tags: Gr7, Gr8, MTH1W

https://bsky.app/profile/bobsonwong.com/post/3madl47uyz22l

Bad math #MTBoS #ITeachMath

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— Bobson Wong (@bobsonwong.com) December 19, 2025 at 6:20 AM

Image Links

Cosine on a Bovine
Curriculum Tags: MPM2D, MCR3U, MCF3M, MHF4U
https://x.com/howie_hua/status/2001449294176592049

You've heard of elf on the shelf but have you heard of pic.twitter.com/Iy4IG03Zs2

— Howie Hua (@howie_hua) December 18, 2025

I have a z-mas tree at my house :-)
Curriculum Tags: MCR3U
https://x.com/Anthony_Bonato/status/2001279107871457399

As a mathematician, I must post this every Christmas season. I don't make the rules pic.twitter.com/jmaKTUzXcu

— Anthony Bonato (@Anthony_Bonato) December 17, 2025

Sometimes the nature of math is amazing
Curriculum Tags: All
https://x.com/pickover/status/1999494678501294412

Mathematics and mystery.

Shiver in ecstasy. The circle that fits precisely inside a 3-4-5 Pythagorean triangle has an area of π. OMG. pic.twitter.com/QtpYmwiiAE

— Cliff Pickover (@pickover) December 12, 2025

Classic factorial humour
Curriculum Tags: MDM4U
https://x.com/pickover/status/2000676079514567060

This is a math joke.
(Meme circulating widely on the Web.) pic.twitter.com/pSewCXvwnv

— Cliff Pickover (@pickover) December 15, 2025

Math Links for Week Ending Dec 12th, 2025

Featured Links

Would you rather is a great strategy, and @JStevens009 has a whole website with prompts
Curriculum Tags:All
https://www.wouldyourathermath.com/
https://x.com/howie_hua/status/1999210926982214071

I turned my most boring math lesson into one of my most engaging math lessons by doing this one thing pic.twitter.com/ykcQ8le3Q3

— Howie Hua (@howie_hua) December 11, 2025

Resource Links

Another classic set of Calendar Problems
Curriculum Tags: All
https://karendcampe.wordpress.com/2025/12/01/december-calendar-problems-4/

Here's the December Calendar of Problems from 40 years ago... the first year of the calendar format!! Enjoy #ProblemSolving this month yourself or w/students; share thinking here or on the post. #MTBoS #iTeachMath #T3Learns #MathsToday #RecreationalMath karendcampe.wordpress.com/2025/12/01/d...

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— Karen Campe (@karencampe.bsky.social) December 1, 2025 at 9:03 AM

Video Links

I like this proof of the Birthday Problem. It would be good to use when teaching about logarithms
Curiculum Tags: MHF4U
https://www.youtube.com/watch?v=OUQVhnuTMVU

A great way to show that how you arrange things can be helpful
Curriculum Tags: MTH1W
https://x.com/howie_hua/status/1997336910558105979

Did you know all prime numbers (except 2 and 3) are one away from a multiple of 6? Here's how we can show this. pic.twitter.com/kj5vwXFkyw

— Howie Hua (@howie_hua) December 6, 2025

I've seen these before but I never get tired of seeing them
Curriculum Tags: Gr8, MTH1W
https://x.com/howie_hua/status/1998462189154562173

Why does the Pythagorean theorem work?

Here are three proofs, including a proof submitted by a U.S. president 5 years before his presidency. pic.twitter.com/82UAkx2SL4

— Howie Hua (@howie_hua) December 9, 2025

Image Links

How long will this pattern go?
Curriculum Tags: All
https://x.com/Ganeshuor/status/1999124320967352809

41 is prime
41+2 is prime
41+2+4 is prime
41+2+4+6 is prime
41+2+4+6+8 is prime
41+2+4+6+8+10 is prime
41+2+4+6+8+10+12 is prime
41+2+4+6+8+10+12+14 is prime
41+2+4+6+8+10+12+14+16 is prime
41+2+4+6+8+10+12+14+16+18 is prime
41+2+4+6+8+10+12+14+16+18+20 is prime

— Ganesh Kumar (@Ganeshuor) December 11, 2025

Math Links for Week Ending Dec 5th, 2025

Featured Links

The Winter Marbleslides is here
Curriculum Tags:All
https://classroom.amplify.com/activity/686fd347372496a99af83645?collections=651ca31cf69ee59aa9e3818a%2C632c77b104648305feffcfda

⛄ Marbleslides: Winter Edition is here!

In this activity, students write equations to capture stars, then the final level switches to transforming points to guide marbles through a snowflake.

❄️ Try it out: https://t.co/t1g5PQlmPA. pic.twitter.com/DQYAfmEre6

— Amplify (@Amplify) December 5, 2025

ResourceLinks

A visual representation of the sum of the first few perfect squares (wth manipulatives)
Curriculum Tags: MCR3U
https://themathguy.blogspot.com/2025/11/the-sum-of-first-n-square-numbers.html

I came across a really nice way of visually showing the sum of the first n square numbers. Details in this blog: themathguy.blogspot.com/2025/11/the-...

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— Mike Jacobs (@mikejacobs.bsky.social) November 10, 2025 at 10:57 AM

Video/Audio Links

My latest podcast, this time with @TheMathGuru as she previews our December Webinar
Curriculum Tags: All
https://talks.oame.on.ca/season-8

[New Podcast] This episode features @TheMathGuru
previewing their Dec 10th @OAMEcounts members only webinar "Math Therapy: How to help students overcome their fear of math!". More info: https://t.co/FNER2hKNvd #MathChat #MTBoS #iTeachMath pic.twitter.com/6MPnoj9myA

— OAMEtalks (@OAMEtalks) December 2, 2025

A quick explainer
Curriculum Tags: MHF4U
https://x.com/howie_hua/status/1996954972710433177

Why does e^ln(x)=x? pic.twitter.com/iXDu3M71r8

— Howie Hua (@howie_hua) December 5, 2025

Image Links

A nice visual summary
Curriculum Tags: MTH1W
https://x.com/Ganeshuor/status/1996786329355800940

Important things about circle pic.twitter.com/kxgjwCCzqs

— Ganesh Kumar (@Ganeshuor) December 5, 2025

Math Links for Week Ending Nov. 28th, 2025

Featured Links

I have always been a fan of CODAP (even when it was Fathom). Now you can try the new version
Curriculum Tags: MDM4U
https://codap.concord.org/v3-beta/

Help us shape the future of CODAP by beta testing CODAP V3! With lighter colors, sharper icons, smoother navigation, and the ability to handle much larger datasets, V3 is being designed to bring CODAP into the future. Share your feedback! https://t.co/uXj2ar7I2r pic.twitter.com/b7sVF3BTIJ

— CODAP (@CODAPdatasci) November 20, 2025

Resource Links

Need a source of natural tessellations? I've always been a fan of tessellations. So of course, I love them in nature
Curriculum Tags: All
https://tessellated-materials.mpikg.mpg.de/collection

A huge, beautiful library of tessellated materials in biology! pic.twitter.com/mKud6FcLnh

— Greg Egan (@gregeganSF) November 21, 2025

Video Links

Randomness becomes the normal distribution
Curriculum Tags: MDM4U
https://x.com/PhysInHistory/status/1991070980756668692

The Galton Board demonstrates the Central Limit Theorem by showing how steel balls, as they pass through levels of branching paths, consistently form a bell curve distribution. This illustrates how random processes tend to cluster around the average. pic.twitter.com/ECWHVhLQSX

— Physics In History (@PhysInHistory) November 19, 2025

Image Links

Beautiful math is everywhere
Curriculum Tags: All
https://x.com/pickover/status/1991668238242152561

Mathematics and symmetry.

Geometry, math, pattern, transcendence. Pattern on the ceiling at the Taj Mahal, India. https://t.co/JmR3nGbl4R pic.twitter.com/2LCRD8KD0K

— Cliff Pickover (@pickover) November 21, 2025

This is a crazy Klein bottle
Curriculum Tags: All
https://x.com/pickover/status/1991614117661323328

Mathematics. Enter a higher dimension.

Spiral Klein Bottle. Source: https://t.co/Vbn0Asj9X2 pic.twitter.com/lGLJmkWsIo

— Cliff Pickover (@pickover) November 20, 2025

You can never have too many WODBs
Curriculum Tags: All
https://x.com/pwharris/status/1991537106892792319

#TryThisThursday

My favorite way to play Which One Doesn't Belong is to choose a reason for each one to not belong.
What are you thinking?#MathIsFigureOutAble #MTBoS #ITeachMath #MathEd pic.twitter.com/8E6q9zkcJp

— Pam Harris (@pwharris) November 20, 2025

Math Links for Week Ending Nov. 21st, 2025

Featured Links

Very cool new Polypad feature making it possible to assign a new Amplify Classroom (Formally Desmos Classroom) activity.
Curriculum Tags: All
https://service.amplify.com/article/amplify-classroom-using-polypad-in-activity-builder

Exciting Polypad update! Educators can now create and assign an @amplifyeducation.bsky.social activity directly from a saved Polypad. Learn more at polypad.amplify.com/p#help-whats-new

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— David Poras (@davidporas.bsky.social) November 13, 2025 at 11:57 AM

Resource Links

What a great idea to infuse literacy in your math class
Curriculum Tags: MDM4U
https://bsky.app/profile/jedediyah.com/post/3m663bgtx7c2t

Shared a Thanksgiving gift with my data science students today! I spend a couple months collecting used copies. Next month we will read chapter 3 Arms Race and reflect on feedback systems and the susceptibility and sensitivity of data models to manipulation.

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— Jed (@jedediyah.com) November 21, 2025 at 3:03 PM

Video Links

Are you looking for something to do to have your kids practice with calculations including powers? How about this?
Curriculum Tags: MTH1W
https://x.com/howie_hua/status/1990126409168142536

What digit is in the ones place when we evaluate 67⁴¹? pic.twitter.com/CQs5VivHNT

— Howie Hua (@howie_hua) November 16, 2025

Image Links

The most common 4 digit PIN numbers, visualized
Curriculum Tags: MDM4U
https://informationisbeautiful.net/visualizations/most-common-pin-codes/

WARNING! This image may trigger PINSecurity. From an analysis of 3.4m PIN codes leaked from several data breaches informationisbeautiful.net/visualizatio...

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— Information is Beautiful (@infobeautiful.bsky.social) November 21, 2025 at 10:55 AM