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

Math Links for Week Ending Nov 14th, 2025

Featured Links

Years ago I wrote about using Plickers (here) and so it was neat to see it come up. It's an almost no-tech way to do instant surveys in class.
Curriculum Tags: All
https://wecdsbit.blogspot.com/2014/11/plickers-free-clicker-app-with-almost.html

I wrote a blog post about Plickers over 10 years ago. Thanks for the reminder: wecdsbit.blogspot.com/2014/11/plic...

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— DavidPetro314 (@davidpetro314.bsky.social) November 8, 2025 at 8:52 AM

Resource Links

I love a good and practical combinatorics problem
Curriculum Tags: MDM4U
https://robertkaplinsky.com/work/how-many-soda-combinations-are-there-on-a-coke-freestyle/

Coke Freestyle machines allow you to take soft drinks and add up to 14 flavors to them. What strategies might your students use to determine how many soda combinations there are on a Coca-Cola Freestyle? robertkaplinsky.com/work/ho...

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— Robert Kaplinsky (@robertkaplinsky.com) November 5, 2025 at 6:14 PM

Video Links

The normal distribution as performance art
Curriculum Tags: MDM4U
https://x.com/Rainmaker1973/status/1988846789542441288

You can literally see the normal distribution pic.twitter.com/WdHpAD3TCE

— Massimo (@Rainmaker1973) November 13, 2025

A good starter for your class when talking about numbers or patterns
Curriculum Tags; Gr7, Gr8, MTH1W
https://x.com/howie_hua/status/1988740091372871929

Can you find 1,000 in this grid?

This is one of my favorite mathematical tasks that I give to students. pic.twitter.com/roNjuEnEE9

— Howie Hua (@howie_hua) November 12, 2025

I have always liked this falacy
Curriculum Tags: All
https://x.com/howie_hua/status/1987539561405428139

Why can't we just say 0/0=1?

I showed one way why this would break math. What's another way? pic.twitter.com/ctsm28fBjm

— Howie Hua (@howie_hua) November 9, 2025

Image Links

Who doesn't love a taxicab number?
Curriculum Tags:All
https://x.com/PhysInHistory/status/1988616819977154726

You are a math geek if you know what this number is ✍️ pic.twitter.com/LXcEMPFCql

— Physics In History (@PhysInHistory) November 12, 2025

Math Links for Week Ending Nov 7th, 2025

Featured Links

I have definitely experienced frustration from students when I don't answer their questions directly "Sir, when are you actually going to teach us?".
Curriculum Tags: All
https://robertkaplinsky.com/one-way-get-students-persevere/

Do your students ever get frustrated when you don't help them as much as they'd like? Here's what I tell them to appreciate what I'm doing for them.https://t.co/mewWggLbTM pic.twitter.com/dVywtjKL8T

— Robert Kaplinsky (@robertkaplinsky) November 3, 2025

Resource Links

Some classic NCTM calendar problems
Curriculum Tags: All
https://karendcampe.wordpress.com/2025/11/01/november-calendar-problems-3/

November is here, and so is the next Calendar of problems! Enjoy these with your students or for yourself, share your thinking here or on the post. #MTBoS #iTeachMath #T3Learns #MathSky #RecreationalMath #MathsToday karendcampe.wordpress.com/2025/11/01/n...

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— Karen Campe (@karencampe.bsky.social) November 1, 2025 at 8:19 AM

Video/Audio Links

The latest OAMEtalks podcast
Curriculum Tags: All
https://talks.oame.on.ca/season-8

[New Podcast] This episode features Stacey Jacobs previewing their Nov 12th @oamecounts.bsky.social members only webinar "Empowering Math Learners: Executive Function Strategies to Support Math Learning". More info: talks.oame.on.ca/season-8 #MathChat #MTBoS #iTeachMath

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— DavidPetro314 (@davidpetro314.bsky.social) November 3, 2025 at 11:01 PM

Math class is not a race
Curriculum Tags: Gr7, Gr8, MTH1W

https://x.com/howie_hua/status/1984623920608395686

Hot take but I always see videos of the butterfly method go viral but I would *never* teach this method and here's why. pic.twitter.com/hJplB1Tzu4

— Howie Hua (@howie_hua) November 1, 2025

Image Links

There is data about everything :-)
Curriculum Tags: MDM4U
https://bsky.app/profile/infobeautiful.bsky.social/post/3m4yr7lqxot2p

Dude, bro, buddy, fella by Quartz @qz qz.com/316906/the-d...

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— Information is Beautiful (@infobeautiful.bsky.social) November 6, 2025 at 6:55 PM

Math Links for Week Ending Oct 31st, 2025

Featured Links

I always appreciate @BenOrlin's dry humour and mathematical prowess. In this case he suggests the 10 best triangles of the 2st century 
Curriculum tags: All
https://mathwithbaddrawings.com/2025/10/14/10-best-triangles-of-the-21st-century-so-far/

Resource Links

Just a bit of math and poetry with this blog
Curriculum Tags: All
https://poetrywithmathematics.blogspot.com/2025/10/can-math-be-funny.html

Video Links

This could be a great application of integers
Curriculum Tags: Gr7, Gr8, MTH1W
https://x.com/howie_hua/status/1983300047069688334

Did you know you can subtract left to right? 😱 pic.twitter.com/DkOE27dnHM

— Howie Hua (@howie_hua) October 28, 2025

Image Links

Classic math joke for Halloween
Curriculum Tags: All
https://x.com/howie_hua/status/1982895725953593773

Wear this on Halloween to scare your math teachers pic.twitter.com/J5Oud4QgPx

— Howie Hua (@howie_hua) October 27, 2025