Math Links for Week Ending Aug 22, 2025

Featured Links

I like problems like this because they seem very complex (or at least using brute force might be difficult) but with they can be solved with elegant simplification.
Curriculum Tags: MDM4U
https://x.com/pickover/status/1957992246025810135

Mathematics, Factorials, Mystery. pic.twitter.com/V9NFhPjDTD

— Cliff Pickover (@pickover) August 20, 2025

Resource Links

I love the connection of something folksy and something new
Curriculum Tags: All
https://samjshah.com/2025/08/19/embroidering-an-aperiodic-tiling/

ACK! Another #MathArt post! I'm on a roll. Mainly because I'm trying to distract myself from the reality that school is starting up soon for me. Here's my embroidered aperiodic tiling. samjshah.com/2025/08/19/e... Instructions from: www.threadedtheorems.com/aperiodic-ti... #MTBoS

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— samjshah.bsky.social (@samjshah.bsky.social) August 18, 2025 at 9:23 PM

Video Links

This could be a good math starter
Curriculum Tags: All
https://bsky.app/profile/howiehua.bsky.social/post/3lwjl5yogrk25

A fun math magic trick and why it works:

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— Howie Hua (@howiehua.bsky.social) August 16, 2025 at 10:25 AM

Image Links

Finally an answer to the question "where will we need this?"
Curriculum Tags: MTH1W
https://bsky.app/profile/curiouspolymath.bsky.social/post/3lww77gtiis24

#mathsky

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— Pete Wung The Curious Polymath (@curiouspolymath.bsky.social) August 21, 2025 at 10:56 AM

I also wonder where they came up with those numbers. Looks like a graphing activity if you ask me. Linear regression to the rescue.
Curriculum Tags: MTH1W, MDM4U, MAP4C
https://x.com/bobloch/status/1958339726085427516

As a math teacher, I'm intrigued by the pricing model for 50/50 tickets by the @Twins #iteachmath pic.twitter.com/8VntHj8CJf

— Bob Lochel (@bobloch) August 21, 2025

Math Links for Week Ending Aug. 15th, 2025

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I don't know how important it is to determine this. However, these seem like good criteria
Curriculum Tags: All
https://www.edutopia.org/article/being-good-math-elementary-students

“Our students bring a wide range of skills to the classroom. That’s why we need to create spaces where every learner is seen as a capable mathematician.” ➗✨ #MathSky #ITeachMath #ElementaryTeacher

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— Edutopia (@edutopia.org) August 14, 2025 at 8:12 AM

Resource Links

This could be the job of some dynamic geometry software or a nice coding project
Curriculum Tags: MTH1W
https://x.com/jamestanton/status/1955897428923548026

For each point inside a 3-4-5 right triangle, measure the three distances a, b, c shown and compute the sum a+b+c.
For which point is this sum largest?
For which point smallest?
Describe the locus of points with a+b+c=3. pic.twitter.com/KTgNkCu7Tw

— James Tanton (@jamestanton) August 14, 2025

Video Links

Some dynamic geometric math art
Curriculum Tags: All
https://x.com/jcponcemath/status/1956221664401973433

:) #mathart pic.twitter.com/NT6xknHbSU

— ∞ 𝕁uan ℂarlos (@jcponcemath) August 15, 2025

Algebra to the rescue (when it comes to explaining math tricks
Curriculum Tags: MTH1W
https://x.com/howie_hua/status/1955301058286326255

If we subtract all the digits from any number, we will always get a multiple of 9. Let's see why! pic.twitter.com/O1kujPyjrf

— Howie Hua (@howie_hua) August 12, 2025

Image Links

This might capture the attention of a certain type of kid
Curriculum Tags: All
https://bsky.app/profile/curiouspolymath.bsky.social/post/3lwgxsbw5as27

#mathsky

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— Pete Wung The Curious Polymath (@curiouspolymath.bsky.social) August 15, 2025 at 9:33 AM

A good math starter
Curriculum Tags: All
https://bsky.app/profile/howiehua.bsky.social/post/3lwf6vygwec2g

I saw this math question on Who Wants To Be a Millionaire. Would you win $125,000? What would your strategy be?

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— Howie Hua (@howiehua.bsky.social) August 14, 2025 at 4:35 PM

A good example of the effects of an outlier
Curriculum Tags: MDM4U
https://bsky.app/profile/mathowitz.bsky.social/post/3lwbvmxmvqs2o

A great example of how easily numbers can be manipulated to make a point. The average run differential in the NL West is -40. 4 out of 5 teams have a positive run differential. The power of an outlier. #mtbos

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— Carl (@mathowitz.bsky.social) August 13, 2025 at 9:11 AM

Who doesn't like a good set of foodie data
Curriculum Tags: MDM4U
https://x.com/infobeautiful/status/1956006027297435880

World's favourite cuisines. 25,000 people in 24 countries were asked which nation's food they preferred. Interesting results 🍕 via @yougov pic.twitter.com/qNobI5xFic

— Information is Beautiful (@infobeautiful) August 14, 2025

Math Links for Week Ending July 25th, 2025

Featured Links

It's the last week of #MathPhoto25
Curriculum Tags: All
https://bsky.app/profile/theericklee.bsky.social/post/3luqgd3xjyk2b

All eight weeks of #MathPHoto25. Feel free to continue posting through the summer with any of the prompts (or combinations of prompts) you notice!

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— Erick Lee (@theericklee.bsky.social) July 24, 2025 at 4:59 PM

Resource Links

I think this would be a great way to introduce permutations
Curriculum Tags: MDM4U
https://bsky.app/profile/mathnerd1729.bsky.social/post/3lul6irptj22z

A spooky calculation I thought of 🧮 1. Choose four distinct single digits. 2. Form all three-digit numbers possible using three distinct digits from those you picked 3. Divide the sum of the three-digit numbers found by the sum of the four distinct digits. You'll always get 666, but why? #MathSky

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— Math Nerd 1729 (@mathnerd1729.bsky.social) July 22, 2025 at 2:54 PM

Video Links

I love visualizing things that we often leave to algorithms
Curriculum Tags: Gr8, MTH1W
https://x.com/howie_hua/status/1948064017182015762

Can you visualize fraction division on the number line? If not, give me around 90 seconds to explain it. pic.twitter.com/76BYRtU9DE

— Howie Hua (@howie_hua) July 23, 2025

It is always cool to see these animations because they are counter intuitive
Curriculum Tags: MCR3U
https://x.com/mathladyhazel/status/1947716757872898371

These trigonometric functions are so satisfying. [https://t.co/OMtZF8tOja] pic.twitter.com/dhBD2wA5WS

— Math Lady Hazel 🇦🇷 (@mathladyhazel) July 22, 2025

Image Links

Math humour for the inverse trig fans
Curriculum Tags: All
https://x.com/howie_hua/status/1947680988760576220

...Oh, I thought I read sec(c). https://t.co/EyEJ8neolV pic.twitter.com/1JKTZCC7uY

— Howie Hua (@howie_hua) July 22, 2025

I'm not sure if "hilarious" is correct but, yes, I would totally make this joke in class :-)
Curriculum Tags: MDM4U
https://x.com/mathladyhazel/status/1947379949268074811

This math joke is hilarious! pic.twitter.com/dYN9cthq5U

— Math Lady Hazel 🇦🇷 (@mathladyhazel) July 21, 2025

Math Links for Week Ending July 18, 2025

Featured Links

What a great build. I love when people both have great ideas and do the heavy lifting
Curriculum Tags: All
https://classroom.amplify.com/activity/6873502673785e2ffd9fc505?checkAmplifyLogin=true

Playing Mastermind with my 6 year old inspired me to make this in #Desmos. I discovered I'm a lot worse at guessing than I thought! #MTBoS #iteachmath classroom.amplify.com/activity/687...

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— Dan Wekselgreene (@dwekselgreene.bsky.social) July 13, 2025 at 2:17 PM

Resource Links

The fact that @JennaLaib continues to add to this site means it makes total sense to continue to point it out
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U
https://slowrevealgraphs.com/

There’s a bunch of new slow reveal graphs up at https://t.co/OhsfPtDqKx!

-what fraction of Nobel Prize winners for science awards are immigrants?
- where do Americans travel within the US?
- what’s more expensive: a pound of a Porsche or a pound of pecorino?
And more!

— Jenna Laib (@jennalaib) July 13, 2025

I don't think we can have too many ways to deal with the fact that AI is on the mind of both teachers and students
Curriculum Tags: All
https://kurtsalisbury.substack.com/p/when-struggle-gets-outsourced

A few weeks back, I was honored to deliver a keynote address at a summer academy for math educators. One question has stuck with me ever since. @amplifyeducation.bsky.social #iteachmath #amplify #AI #edtech. kurtsalisbury.substack.com/p/when-strug...

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— Kurt Salisbury (@kurt-salisbury.bsky.social) July 14, 2025 at 9:09 AM

This has always been an issue. Now no matter how many times you change your Desmos graph, the link will stay the same.

Curriculum Tags: All
https://help.desmos.com/hc/en-us/articles/4405901719309-Saving-and-Sharing-Graphs

Me? Typos? Never… When you save your graph, the link now automatically updates with your latest saved edits. Learn more about saving and sharing your graphs in the Desmos Help Center: help.desmos.com/hc/en-us/art... #iteachmath

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— Desmos Studio 🔜 APAC25 (@desmos.com) July 16, 2025 at 11:25 AM

Video Links

I always appreciate a visual example of the difference between Permutations and Combinations
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/1945580493761908895

What's happening in the permutation and combination formulas? Let's make sense of them! pic.twitter.com/SQsbeYii0R

— Howie Hua (@howie_hua) July 16, 2025

Image Links

Here is your week 7 prompt
Curriculum Tags: All
https://bsky.app/profile/theericklee.bsky.social/post/3lu6kiexf3s2p

The penultimate week of #MathPhoto25 is #circles! Where do you notice circles, cylinders, spheres or ellipses in the world around you? #ITeachMath #MathsToday

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— Erick Lee (@theericklee.bsky.social) July 17, 2025 at 2:23 PM

Math Links for Week Ending June 27, 2025

Featured Links

Who knew there were so many ways to creat a mathematical insult 
Curriculum Tags: All
https://x.com/howie_hua/status/1937894299905282491

Give an insult, but make it mathematical.

— Howie Hua (@howie_hua) June 25, 2025

Resource Links

I like that @StevenStrogatz is making these articles available
Curriculum Tags: All
https://x.com/stevenstrogatz/status/1937093443936805358

This week's installment of Math, Revealed -- Let's Get Packing! Please retweet this gift link, which lets people see the article for free. https://t.co/NULrXzxJi3

— Steven Strogatz (@stevenstrogatz) June 23, 2025

Interesting idea, check out the posts to see some different ways of student thinking
Curriculum Tags: All
https://mathsuntangle.blogspot.com/

I'm starting a new blog, prompted by students I tutor, who seem tangled up in procedures. mathsuntangle.blogspot.com

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— ProfSmudge (@profsmudge.bsky.social) June 17, 2025 at 6:24 AM

Video Links

Analyzing data from the NBA
Curriculum Tags: MDM4U
https://www.youtube.com/watch?v=zAYSK34W1qk

Image Links

Nice visualization. Who knew so many people just use the same digit repeated?
Curriculum Tags: MDM4U
https://bsky.app/profile/joelbezaire.bsky.social/post/3ls7k377mzc2c

#iteachmath #notice #wonder

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— Joel Bezaire 🇨🇦 (@joelbezaire.bsky.social) June 22, 2025 at 12:58 PM

This week's prompt:
Curriculum Tags: All
https://bsky.app/profile/theericklee.bsky.social/post/3lsjdlfochs2e

This week’s #MathPhoto25 prompt is #even. Where do you see things that come in pairs? Where do even numbers show up in your world—on signs, in patterns, or in nature? #ITeachMath

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— Erick Lee (@theericklee.bsky.social) June 26, 2025 at 10:29 AM

Math Links for Week Ending May 23, 2025

Featured Links

If you didn't already know, @Desmos Classroom will be turning into @Amplify Classroom. Check out this webinar for more info
Curriculum Tags: All
https://amplify.zoom.us/webinar/register/WN_zYeYp7aJRXSYkSST-uTuGA#/registration

#ICYMI: On June 28, Desmos Classroom will become Amplify Classroom as we expand to science and literacy! Drop by our webinar, where we'll discuss exciting updates to the platform experience. Gain exclusive insights into the upgraded platform. Register here:https://t.co/f3XwZfRxaj pic.twitter.com/dq72xQtJT1

— Desmos Classroom (@desmosclassroom) May 22, 2025

Resource Links

It looks like @FawnpNguyen is blogging again. Here is a nice starter activity if you are introducing or reviewing perimeter and area
Curriculum tags: All
https://fawnnguyen.substack.com/p/dot-paper-task

In Canada we got rid of the penny years ago. Still, here's a relevant Slow Reveal Graph 
Curriculum Tags: Gr7, Gr8, MDM4U
https://slowrevealgraphs.com/2022/01/09/cost-of-minting-us-coins-pennies-nickels-cost-more-than-their-face-value/







Some information on dealing with students who have Dyscalculia
Curriculum Tags: All
https://www.edutopia.org/article/teaching-students-dyscalculia

If a student is struggling in math, dyscalculia could be the reason. ➗ Here are some ways to recognize signs—and strategies designed for learners with dyscalculia. #dyscalculia #EduSky #ITeachMath #MathSky

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— Edutopia (@edutopia.org) May 23, 2025 at 12:37 PM

Video Links

This is a great way to compare fractions 
Curriculum Tags: Gr7, Gr8 MTH1W
https://x.com/howie_hua/status/1926038342602289212

A lot of people use common denominators when comparing fractions, but did you know we can use common numerators as well? Here's how we can do this: pic.twitter.com/7c6Hge6meE

— Howie Hua (@howie_hua) May 23, 2025

Image Links

A couple of Tape Diagrams for you 
Curriculum Tags: Gr7, Gr8, MTH1W
https://bsky.app/profile/duanehabecker.com/post/3lp2gq65ale2a
https://bsky.app/profile/duanehabecker.com/post/3lp2gzacchk2p

It's time for #TapeDiagramTuesday! Here's what to do: 1. Pick a problem. 2. Solve it using a tape diagram to model your thinking. - - - - OR - - - - Give the problem to your students to model. 3. Share your model with #TapeDiagramTuesday #iTeachMath

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— Duane Habecker (@duanehabecker.com) May 13, 2025 at 8:00 AM

It's time for your #TapeDiagramTuesday extra challenge! Model your solution strategy with a tape diagram. Then share it with the community! #iTeachMath

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— Duane Habecker (@duanehabecker.com) May 13, 2025 at 8:05 AM

Math Links for Week Ending May 2nd, 2025

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It's the OAME annual conference this week and even though there are hundreds of face to face sessions, you can take part in the virtual version from the comfort of your own couch. Register at the link below.
Curriculum Tags: All
https://mcis.oame.on.ca/

Announcing the OAME2025 Virtual Conference. Can't make it to our in-person event? Check out our Virtual Conference option and register at https://t.co/2MQTuRrtO3. @OAMEcounts pic.twitter.com/5cHpDB9Iz9

— OAMElearns (@OAMElearns) April 15, 2025

Resource Links

The latest set of classic NCTM calendar problems.
Curriculum Tags: All
https://karendcampe.wordpress.com/2025/05/01/may-calendar-problems-3/

The May Calendar of Problems is here! Enjoy some #Math #ProblemSolving in the home stretch of your school year! Plus Bonus Article "Table Techniques" using table of values as dynamic tool w/technology. #MTBoS #iTeachMath #T3Learns #MathSky #MathsToday karendcampe.wordpress.com/2025/05/01/m...

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— Karen Campe (@karencampe.bsky.social) May 1, 2025 at 8:21 AM

Video Links

This is so fun.
Curriculum Tags: All
https://www.youtube.com/watch?v=MzMPK7OeHow

Image Links

You have to love 21st century pattern blocks
Curriculum Tags: All
https://bsky.app/profile/murrayh83.bsky.social/post/3lo4x63a73k2y

More pattern block play with heptagons–same shapes as last month, but now arranged a bit differently! #21CenturyPB #iTeachMath

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— Hana Murray (@murrayh83.bsky.social) May 1, 2025 at 2:34 PM

Some sugary data for you
Curriculum Tags: Gr7, Gr8, MDM4U
https://x.com/infobeautiful/status/1917910180387258711

Sweet teeth in the East. How much sugar in Fanta
via @simongerman600 pic.twitter.com/xOvm5Tr9Eb

— Information is Beautiful (@infobeautiful) May 1, 2025

Math Links for Week Ending Mar 28th, 2025

Featured Links

A long time ago I taught my daughter, who was in grade 3, how to differentiate simple polynomial functions just to show that just knowing an algorithm doesn't mean you understand the math. So this totally resonates with me. 
Curriculum Tags: All
https://x.com/howie_hua/status/1905059978907730276

My response to comments saying "Just teach the algorithm!" pic.twitter.com/Ixx2VCIUpq

— Howie Hua (@howie_hua) March 27, 2025

Resource Links

I like this type of activity because it takes a very real problem and connects it directly to a specific mathematical expectation.
Curriculum Tags: MCT4C, MCR3U, MAP4C

https://docs.google.com/presentation/d/1kgv_ji_ZWnZHMAlmw_rk_JZIxIyLiWcenCfTvfOzgMY/edit#slide=id.g3432336fed9_0_278

I spent way too long making this lesson on climate change and exponential decay. So, hopefully someone out there can use it. #MaththatMatters #iteachmath #mathstoday #mtbos Slides: docs.google.com/presentation... Task: docs.google.com/document/d/1...

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— Bryan Meyer (@doingmath.bsky.social) March 25, 2025 at 4:00 PM

There are some nice measurement and arithmetic sequence resources (among other things)
Curriculum Tags: All
https://www.resourceaholic.com/2025/03/5-maths-gems-188.html

New! My 188th gems post. Ideas, updates and resources for maths teachers. 💎https://t.co/fwwMtW6rTW#mathsgems #mathschat #teammaths #mathstlp #mathscpdchat pic.twitter.com/jk7EbmnHa1

— Jo Morgan (@mathsjem) March 23, 2025

There are always more graphs and @JennaLaib keeps them coming
Curriculum Tags: MDM4U

https://slowrevealgraphs.com/

New #SlowRevealGraph Additions!

Check out https://t.co/OhsfPtDqKx to explore
-How far can migrating animals travel in one day?
-How impressive was Chelsea FC's Cole Palmer's debut?
- How many 'living languages' are spoken in different countries? #MTBoS #ITeachMath pic.twitter.com/9a7qqTghQL

— Jenna Laib (@jennalaib) March 24, 2025

Video Links

You can do the same thing with @Desmos but I think there is nothing like a physical manipulative
Curriculum Tags: MPM2D, MCF3M, MCR3U, MBF3C

https://bsky.app/profile/scaffoldedmath.bsky.social/post/3llc4z75ogc2h

Graphing quadratics in vertex form #mathsky

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— scaffoldedmath.bsky.social (@scaffoldedmath.bsky.social) March 26, 2025 at 11:46 AM

A very topical percentage problem. 
Curriculum Tags: Gr8, Gr7, MTH1W, MAT1L , MAT2L

https://x.com/howie_hua/status/1905424336342974799

If the price of a car increased by 25% and the increased price is $36,000, what was the original price of the car? pic.twitter.com/8pXVHHO5qu

— Howie Hua (@howie_hua) March 28, 2025

Image Links

I have always loved this Calvin and Hobbs cartoon. I think even when I was much younger I think I recognized that this satirized the idea of what a "math person" is 

Curriculum Tags: All

https://bsky.app/profile/karencampe.bsky.social/post/3ll6b25hxgc2e

@jennalaib.bsky.social HERE IS THE COMIC I WAS THINKING OF!!! #iTeachMath

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— Karen Campe (@karencampe.bsky.social) March 24, 2025 at 10:48 PM

A perfect math starter
Curriculum Tags: All

https://bsky.app/profile/duanehabecker.com/post/3lkyonxp24q26

#RecreationalMath #iTeachMath #MathSky

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— Duane Habecker (@duanehabecker.com) March 22, 2025 at 5:35 PM

The latest #TapeDiagramTuesday post
Curriculum Tags: MTH1W
https://bsky.app/profile/duanehabecker.com/post/3ll7a5z5i2z2v

It's time for your #TapeDiagramTuesday extra challenge! Model your solution strategy with a tape diagram. Then share it with the community! #iTeachMath

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— Duane Habecker (@duanehabecker.com) March 25, 2025 at 8:05 AM

This is in the same vein as "Which one Doesn't Belong"
Curriculum Tags: MCR3U
https://x.com/StudyMaths/status/1905665653169598619

Try some values, then put the result back into the function. What do you notice?#1001MathsBots pic.twitter.com/pFq7R5Aaf7

— Jonathan Hall (@StudyMaths) March 28, 2025

Math Links for Week Ending Feb 14, 2025

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I never miss a chance to share @SaraVanDerWerf's stuff. This may be too late for this year but put it in your back pocket for next year. 
Curriculum Tags: All
https://www.saravanderwerf.com/nerding-out-on-resources-for-valentines-day/

Resource Links

Some Valentines activities for exponential functions
Curriculum Tags: MCR3U, MAP4C, MHF4U, MCT4C
https://karendcampe.wordpress.com/2022/02/10/i-%e2%9d%a4%ef%b8%8f-candy-math/

Take advantage of valentines candy to explore exponential models with your students! Check out "I ❤️ Candy Math" for Valentine's Day this week! #MTBoS #iTeachMath #MathSky #MathsToday karendcampe.wordpress.com/2022/02/10/i...

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— Karen Campe (@karencampe.bsky.social) February 8, 2025 at 9:20 AM

Some resources for teaching logs
Curriculum Tags: MHF4U
https://timcorica.substack.com/p/logarithms-some-teaching-ideas

#iTeachMath #MathsToday Someone posted a request for ideas for livening up a unit on logarithms, so I did a brain dump of 45 years of teaching, and posted it on my substack: open.substack.com/pub/timcoric...

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— Tim Corica (@tcorica.bsky.social) February 9, 2025 at 10:34 AM

A nice real world problem dealing with the value of a penny.

Curriculum Tags: MTH1W
https://www.citizenmath.com/lessons/common-cents

Should we nix the penny? 💰 #EduSky 🍎: Will you comment ideas and resources to explore this question as a class -- or on your own! -- so we can create one BIG thread 🧵 on this #RealWorldMath? 🌍 We'll go first. You add on and repost...👇 #MathSky #ITeachMath #PBL www.citizenmath.com/lessons/comm...

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— Citizen Math (@citizenmath.bsky.social) February 10, 2025 at 2:50 PM

Video/Audio Links

The latest preview of #OAME2025
Curriculum Tags: All
https://talks.oame.on.ca/season-7

[New Podcast] It's the @OAMEcounts #OAME2025 Day 2 preview. Featuring @TheMathGuru @joboaler @NatBanting. Listen here:https://t.co/95KyY9ZtpW

Check out all the conference info at https://t.co/PCaIcus9Zd #MathChat #MTBoS #iTeachMath pic.twitter.com/YT8NtOI6mE

— OAMEtalks (@OAMEtalks) February 9, 2025

Here's your Desmos Valentines eCard
Curriculum Tags: All
https://www.desmos.com/calculator/yhaz5chjsr

Made with love (and equations). 💕 💌 Explore the graph, and personalize your own to share: www.desmos.com/calculator/y... #mathsky #iteachmath

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— Desmos Studio (@desmos.com) February 13, 2025 at 9:14 AM

Image Links

This is a fun factorial question. I don't think you can do it algebraically, you have to use some logic and knowledge of factorials 
Curriculum Tags: MDM4U
https://x.com/antonillos/status/1888505163800887542

solve for d. how fast can you find it❓ #math #challenge pic.twitter.com/bTqhcsdsOq

— Antonio Saco (@antonillos) February 9, 2025

Perfect when you are talking about order of operations
Curriculum Tags: Gr8, MTH1W

https://bsky.app/profile/natbanting.bsky.social/post/3li3lhddgz22g

These make me smirk every time. (Side quest: if someone answers “48,” what led them to that conviction?)

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— Nat Banting (@natbanting.bsky.social) February 13, 2025 at 4:00 PM

Math Links for Week Ending Feb 7th, 2025

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Valentine's Day is coming
Curriculum Tags: All
https://x.com/howie_hua/status/1887316499683287246
            

How to make intertwined hearts with your Valentine using math pic.twitter.com/czRrhPh0Jc

— Howie Hua (@howie_hua) February 6, 2025

Resource Links

The latest set of classic NCTM calendar problem
Curriculum Tags: All
https://karendcampe.wordpress.com/2025/02/01/february-calendar-problems-3/

February Calendar of #ProblemSolvong is posted! Try some #RecreationalMath & share thoughts here or on the blog. Plus BONUS content article: "13 Rules That Expire" Enjoy! Consider subscribing so never miss a post. #MTBoS #iTeachMath #MathSky #MathsToday karendcampe.wordpress.com/2025/02/01/f...

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— Karen Campe (@karencampe.bsky.social) February 2, 2025 at 9:41 AM

Video/Audio Links

We are starting our previews of the #OAME2025 conference. Here is the first one
Curriculum Tags: All
https://talks.oame.on.ca/season-7

[New Podcast] It's the @OAMEcounts #OAME2025 Day 1 preview. Featuring @rjdurocher @Jason_To @LLB_315 & Camile Jones-Ford. Listen here: https://t.co/95KyY9ZtpW

Check out all the conference info at https://t.co/PCaIcus9Zd #MathChat #MTBoS #iTeachMath pic.twitter.com/hyQZhe5HDX

— OAMEtalks (@OAMEtalks) February 2, 2025

I love using the multiply by zero principle to prove that a negative times a negative is a positive. 
Curriculum Tags: Gr8
https://x.com/howie_hua/status/1885458678129864782

Why does a negative times a negative equal a positive? pic.twitter.com/lUsMBs0oet

— Howie Hua (@howie_hua) January 31, 2025

Here's a fun mathematical fact about the year, 2025, that I haven't seen yet
Curriculum Tags: All

https://x.com/aap03102/status/1886692753112735989

Every geek already knows that 2025 is a square year:

√2025 = 45

but did you know THIS….?! pic.twitter.com/G6uTK8lPXY

— Chris Smith MBE (@aap03102) February 4, 2025

It's funny how changing the context like this makes problems so much more palatable
Curriculum Tags: MPM2P, MFM2P
https://x.com/howie_hua/status/1886979871987167417

When you want students to solve a system of linear equations: pic.twitter.com/QY56nADJK2

— Howie Hua (@howie_hua) February 5, 2025

Connecting art and math
Curriculum Tags: All

https://www.youtube.com/watch?v=qV5iAbC1S58

Image Links

It's all math
Curriculum Tags: All
https://x.com/pickover/status/1886581661111833005

Sociology, biology, chemistry, physics, mathematics.

By Randall Munroe, https://t.co/WuBZ0BJ3Ae, cc by-nc 2.5 pic.twitter.com/HSsiWhqJsz

— Cliff Pickover (@pickover) February 4, 2025

It's important to understand functions
Curriculum Tags: MHF4U
https://bsky.app/profile/johngolden.bsky.social/post/3lh7c66e4fo2m

#mathcomic from our friend @billamend.bsky.social foxtrot.com/2025/02/02/s...?

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— John Golden (@johngolden.bsky.social) February 2, 2025 at 10:00 AM

Different forms of the same data
Curriculum Tags: MDM4U
https://bsky.app/profile/abiruiz.bsky.social/post/3lh7i3w2zik2l

Love this visualization of data at different stages. (Via Monica Rosales Ascencio)

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— Abi Ruiz (@abiruiz.bsky.social) February 2, 2025 at 11:46 AM

More math and art
Curriculum Tags: All
https://bsky.app/profile/3n1gm4th.bsky.social/post/3lhkyhffew22p

Louvre Pyramid Located: Paris, France. Completed: 1989. Architect: I. M. Pei. #3n1gm4th #math #architecture

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— 3N1GM4TH (@3n1gm4th.bsky.social) February 7, 2025 at 1:38 AM

Math Links for Week Ending Jan 31, 2025

Featured Links

A book study for the book "Making Math Stick" is starting this week. 
Curriculum Tags: All
https://oame.on.ca/mcis/index.php

Check it out!

A virtual Making Math Stick Book Study with @oame_qslma.

Spread the word!#math #onted @PembrokePublish pic.twitter.com/PHImicQmxb

— Dr David Costello (@dr_costello) January 27, 2025

Resource Links

Some resources from @MathsJem. Some Geometry and algebra and more. I really like the one with different (related) expressions that asks students to read to each other to guess the expression.
Curriculum Tags: All
https://www.resourceaholic.com/2025/01/5-maths-gems-185.html

New! My 185th gems post. Ideas, resources and updates for maths teachers. 💎 https://t.co/YOtXh1GISK

Hat tips to follow. #mathsgems #mathschat #mathstlp #teammaths #mathscpdchat pic.twitter.com/aEOco7gs91

— Jo Morgan (@mathsjem) January 25, 2025

I use this type of example when talking about expected value with my students. That is, the idea of how the insurance industry uses expected value to figure out how to set premiums. 
Curriculum Tags: MDM4U

https://x.com/AndrewLolmaugh/status/1883899701314924839

Not at all actually. Having run Hole in One contests for the golf course, I can tell you, the dealership will purchase an insurance package that pays them the full retail value of the prize if it happens to be won. Odds of someone winning in the case of a Hole in One is 12,500 to…

— Andrew McLellan Lolmaugh (@AndrewLolmaugh) January 27, 2025

Here's a fun little activity for learning about ratios.
Curriculum Tags: Gr8, MTH1W
https://robertkaplinsky.com/work/how-much-bigger-should-they-make-zoolanders-school/

I love using this lesson to teach about scale and proportions. How many times bigger should Zoolander's school be? https://t.co/0YJjod5rck pic.twitter.com/4wLqbuMWic

— Robert Kaplinsky (@robertkaplinsky) January 27, 2025

I totally appreciate all the work that would have gone into these interactives for practicing dealing with mixed radicals and linear inequalities.
Curriculum Tags: MTH1W, MPM2D

https://bsky.app/profile/imperfectsquare.com/post/3lgsq6gl3bk2k

Solving inequalities (with negative coefficients) version of the Valentine's activity. tiny.cc/ineqvalentines. Available for anyone to use, along with printable worksheet. Simplifying radicals version at tiny.cc/radvalentines. #iteachmath #mtbos #algebra #prealgebra #edusky #mathsky

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— Sarah Shartzer (@imperfectsquare.com) January 28, 2025 at 10:06 AM

I love what I call Equation Strips or Bar Models but they are also know as Tape Diagrams. Here are links to my resources and a whole site relating to them
Curriculum Tags: Gr7, Gr8, MTH1W

https://bsky.app/profile/davidpetro314.bsky.social/post/3lgsxw7omhc2o

I have always called these equation strips but I love that he includes a link to more stuff Https://bit.ly/TapeDiagramTuesday I also have some of my own including an interactive applet & @Desmos.com Classroom activity here engaging-math.blogspot.com/search/label... #iTeachMath #MathChat #MTBoS

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— DavidPetro314 (@davidpetro314.bsky.social) January 28, 2025 at 12:24 PM

The Superbowl is coming up and so you might like this activity that uses sports betting probabilities as a real world example. And if you want to take it a step further, this podcast series on sports betting shows why you shouldn't (ie the odds and other things are stacked against you). 
Curriculum Tags: MDM4U
https://teacher.desmos.com/activitybuilder/custom/61f847b4990b4d76d1b6a5e4

I think this would pair very nicely with the latest Against the Rules podcast where the latest season is about the sports betting industry and *spoiler alert* the odds are stacked against the betters-high school betting is where it starts www.pushkin.fm/podcasts/aga... #MathChat #iTeachMath #MTBoS

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— DavidPetro314 (@davidpetro314.bsky.social) January 28, 2025 at 10:01 PM

Video Links

I have always loved the Sieve of Eratosthenes (even though I can rarely pronounce it)
Curriculum Tags: MTH1W
https://x.com/howie_hua/status/1883285081663701333

How to quickly find all prime numbers from 1 to 100 pic.twitter.com/xROH2NrGSs

— Howie Hua (@howie_hua) January 25, 2025

I used to watch the show Numbers years ago where a mathematician solved crimes. That being said, I didn't know that this new show Prime Target was also about a mathematician, this time trying to save the world with prime numbers (literally). And this substack breaks each episode down. 
Curriculum Tags: All
https://bsky.app/profile/tcorica.bsky.social/post/3lgv2lsxgc22b

Prime Target Ep.3 drops today. To catch up on the mathematics in Ep.1 and Ep.2, drop by here: timcorica.substack.com/p/prime-targ... #PrimeTarget #MathsToday #iTeachMath

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— Tim Corica (@tcorica.bsky.social) January 29, 2025 at 8:18 AM

Some real world calculus for you
Curriculum Tags: MCV4U
https://bsky.app/profile/mathmatize.bsky.social/post/3lgv6ssix3k2c

When the slide is continuous but not differentiable #MathSky

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— MathMatize Memes (@mathmatize.bsky.social) January 29, 2025 at 9:33 AM

Image Links

What math questions would you come up with?
Curriculum Tags: All
https://bsky.app/profile/gregbcurran.bsky.social/post/3lgjfbjdzzs25

Love this Maths provocation #iTeachMath

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— Dr Greg Curran (@gregbcurran.bsky.social) January 24, 2025 at 4:57 PM

Math Links for Week Ending Jan 24th, 2025

Featured Links

A free webinar on computational thinking looks like a great opportunity to learn
Curriculum Tags: All
https://mikeflynn.lpages.co/microburst/

Come learn alongside us! Free registration here: bit.ly/microburst130 We can’t wait to join you there. #math #mathclass #matheducation

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— Zak Champagne (@zakchamp.bsky.social) January 24, 2025 at 5:27 PM

Resource Links

I agree with @DavidKButler, that proofs without words are not without effort
Curriculum Tags: Gr8, MTH1W
https://bsky.app/profile/davidkbutler.bsky.social/post/3lg7j3ihe222d

This is the first time I have seen anyone ever articulate up front that Proofs Without Words require the reader to put in effort. Seriously it needs to be much clearer on the box that they are actually Proofs That Need You To Add Words.

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— David K Butler (@davidkbutler.bsky.social) January 20, 2025 at 6:38 PM

Video Links

I'm sure you can use this to talk about transformations, recursion and scaling (and maybe other topics) with this video.
Curriculum Tags: All
https://x.com/gregeganSF/status/1880176485677560200

If you let one row of fish follow their nose in Escher’s woodcut “Circle Limit III”, all the rest are forced to swing around wildly.

The fish here are strung out along “hypercycles”: curves in the hyperbolic plane that are equidistant from a given hyperbolic line, but no two … pic.twitter.com/iFvjEd5xoI

— Greg Egan (@gregeganSF) January 17, 2025

I never get tired of this animation to show where the area of a circle formula comes from. You can also use it in Calculus when talking about thinner and thinner slices. 
Curriculum Tags: Gr7, Gr8, MCV4U
https://x.com/mathladyhazel/status/1880470241601622391

It makes soooo much sense now why the area of a circle is πr^2! pic.twitter.com/YEMhXHO3rK

— Math Lady Hazel 🇦🇷 (@mathladyhazel) January 18, 2025

Perfect for the binomial theorem
Curriculum Tags: MDM4U

https://x.com/mathladyhazel/status/1881438549490180292

Order from chaos. The Galton board. pic.twitter.com/5PxBfb2AWf

— Math Lady Hazel 🇦🇷 (@mathladyhazel) January 20, 2025

Image Links

I don't know why I love these power and exponent type questions. 
Curriculum Tags: MTH1W, MPM2D, MCR3U
https://x.com/GeometryPuzzles/status/1881033853508452360

90 percent fail this equation #equation pic.twitter.com/coRidz8Lzg

— Math Lover (@GeometryPuzzles) January 19, 2025

Math Links for week Ending Jan 3, 2024

Featured Links

This is exactly how it used to be on Twitter. It's good to see that the math community is alive and well here. Check out all the great links shared in the comments.
Curriculum Tags: All
https://bsky.app/profile/druinok.bsky.social/post/3lerifa34yk2n

Math friends.. any suggestions for a good video on Sierpinski's triangle? My next chapter is similarity and thought that would be a good Monday activity after break. #mathsky #iteachmath #mtbos

— druinok (@druinok.bsky.social) January 2, 2025 at 11:23 AM

Resource Links

I am always looking for ways to relate the mathematics we teach to things that occur in the real world
Curriculum Tags: MCR3U
https://bsky.app/profile/davidpetro314.bsky.social/post/3leudxtgmwk23

Need an application of the Law of Sines to talk about with your students? How about the construction of the @spherevegas.bsky.social ? Thanks to @standupmaths.bsky.social for pointing this out in his new book "Love Triangle" www.thesphere.com/science #MathChat #iTeachMath #MTBoS

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— DavidPetro314 (@davidpetro314.bsky.social) January 3, 2025 at 2:42 PM

Some algebra, some geometry and many other topics. Take a look
Curriculum Tags: All
https://www.resourceaholic.com/2025/01/5-maths-gems-184.html

New! My 184th gems post. Ideas, updates and resources for maths teachers. 💎 www.resourceaholic.com/2025/01/5-ma... #UKMathsChat #MathsToday

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— Jo Morgan (@mathsjem.bsky.social) January 2, 2025 at 12:28 PM

The latest set of classic NCTM calendar problems
Curriculum Tags: All
https://karendcampe.wordpress.com/2025/01/01/january-calendar-problems-3/

Happy New Year! Enjoy the January #ProblemSolving Calendar! Share your process here or on post. Also: BONUS article-teaching strategies for success in #math. Sign up to get an email for new posts ✅ #MTBoS #iTeachMath #MathSky #RecreationalMath #MathsToday karendcampe.wordpress.com/2025/01/01/j...

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— Karen Campe (@karencampe.bsky.social) January 1, 2025 at 10:32 AM

I highly recommend the (slow) elementary math chat if you are up for it. 
Curriculum Tags: All
https://bsky.app/profile/r-cilr.bsky.social/post/3lecw2x2t6s2s

#EduChatList - Live & Slow Education Chats *Posted 12.27.24 #SunChat #YouthMade #Rethink_Learning #EdTechChat #TLAP #EduSkyChat #TheEdCollab #TLSkyChat #CodeBreaker #LevelUpEdu #EduSkyAI #ElemMathChat #PD4UAndMe #LeadLAP #BFC530 #UngradingChat #ELSky #WhyEdifyReview

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— Rebecca 🌷 (@r-cilr.bsky.social) December 27, 2024 at 4:18 PM

This is a neat little problem that you might want to try when talking about types of numbers, if only to do some brute force solutions or to try to code some checks. 
Curriculum Tags: MTH1W
https://bsky.app/profile/benjamindickman.bsky.social/post/3ledrbj2edk2v

The 1st day of the new year has passed but you can still have fun with this
Curriculum Tags: All

https://x.com/MathsEdIdeas/status/1874390226229166350

By the end of today, exactly
1×2×3×4×5×6×5×4×3×2×1
seconds will have passed this year.

= 1 day
= 24 hours
= 24×60 minutes
= 24×60×60 seconds
= (2×3×4)×(5×6×2)×(5×4×3) seconds
= 1×2×3×4×5×6×5×4×3×2×1 seconds#HappyNewYear #HappyNewYear2025

— Maths Ed (@MathsEdIdeas) January 1, 2025

Video/Audio Links

A great problem when discussing the idea of average in a deeper way.
Curriculum Tags: MDM4U
https://bsky.app/profile/howiehua.bsky.social/post/3leovyr67ik25

A fun math puzzle: Town A and Town B are 30 miles apart. If you drove 30mph from Town A to Town B, how fast do you need to drive going back to have an overall average speed of 60mph? #math #ITeachMath #EduSky #MathSky youtube.com/shorts/0w_yQ...

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— Howie Hua (@howiehua.bsky.social) January 1, 2025 at 10:49 AM

Lots of math around the number 2025
Curriculum Tags: All
https://bsky.app/profile/howiehua.bsky.social/post/3lehbx7o54k2q

2025 is going to be a really square year, and also be on the lookout for this specific square date! #math #ITeachMath #EduSky youtube.com/shorts/CEZ6B...

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— Howie Hua (@howiehua.bsky.social) December 29, 2024 at 10:02 AM

I love this proof of the area of a circle
Curriculum Tags: Gr8, MTH1W

https://bsky.app/profile/tbrzezinski.bsky.social/post/3leezazsly22g

Best way to arrange frozen pizza 🍕 in the oven. And how to find the area of a circle: youtube.com/shorts/xlumX... #MTBoS #ITeachMath #edusky

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— Tim Brzezinski (@tbrzezinski.bsky.social) December 28, 2024 at 12:21 PM

A fun geometry video
Curriculum Tags: All
https://x.com/pickover/status/1874569819561091241

→ Mathematics, Geometry, Physics, Vibration, Packing, Tiling.

Credit: I didn’t upload this video to 𝕏. I’m pointing to a video residing in the 𝕏 stream of “interesting_aIl” (Jan 1, 2025) pic.twitter.com/BwnqcFl993

— Cliff Pickover (@pickover) January 1, 2025

Are you participating in Genuary?
Curriculum Tags: All
https://x.com/LukeSelfwalker/status/1874502239446085726

#genuary1 - Vertical or horizontal lines only.
#genuary #GENUARY2025 https://t.co/MlA73GHoll pic.twitter.com/WWaPR2FWx8

— Luke Walsh (@LukeSelfwalker) January 1, 2025

The latest OAMEtalks podcast features @LLB_315 with a preview of her members only webinar but don't let that stop you, there are some great resources that she talks about. 

Curriculum Tags: All
https://talks.oame.on.ca/season-7



A nice visualization (plus source code)
Curriculum Tags: All
https://x.com/panlepan/status/1874107178094911746

2025 is the sum of all the products in the multiplication table from 1 to 9 because:
2025 = (1+2+3+4+5+6+7+8+9)²
This @GeoGebra #MathGIF shows why we also have:
2025= 1³+2³+3³+4³+5³+6³+7³+8³+9³
⏯https://t.co/osAAevIPVe#HappyNewYear2025 pic.twitter.com/KWjLL7vJk5

— Vincent Pantal🍩ni (@panlepan) December 31, 2024

I don't try to be political here but I still think this is funny. Math to the rescue
Curriculum Tags: All
https://x.com/samtripoli/status/1874141752145396084

This is such an amazing bit, @ronnychieng! pic.twitter.com/7nVjZdM5eO

— Sam Tripoli (@samtripoli) December 31, 2024

Image Links

Perfect if you are talking about exponential relationships (you might have to talk a bit about why a black hole is a black hole though - hint you are going to be talking about super dense objects)
Curriculum Tags: MCR3U, MCF3M, MAP4C
https://xkcd.com/3033/

Origami Black Hole xkcd.com/3033

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— Randall Munroe (@xkcd.com) January 3, 2025 at 2:02 PM

A challenge for proving triangles are congruent
Curriculum Tags: Gr8

https://bsky.app/profile/profsmudge.bsky.social/post/3letlcwyu2k2t

Tri-ing....

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— ProfSmudge (@profsmudge.bsky.social) January 3, 2025 at 7:21 AM

Who doesn't like a good rates of change joke?
Curriculum Tags: MCV4U
https://xkcd.com/2974/

Storage Tanks xkcd.com/2974

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— Randall Munroe (@xkcd.com) August 20, 2024 at 8:22 AM

Lots more 2025 math
Curriculum Tags: All
https://x.com/ElterEric/status/1874554980109336796

Happy New Year. To display in your classrooms. 2025 in all its forms, from school to university. Enough to awaken the curiosity of all our students, from the youngest to the oldest. #NY #NY2025 #MathematicalCuriosity #BeautyOfMathematics pic.twitter.com/rAwNxWFArD

— Eric Elter (@ElterEric) January 1, 2025

So many resources for 2025
Curriculum Tags: All
https://x.com/fawnpnguyen/status/1874205423278146042

Chiming in on the highlight of 2025. Here's my https://t.co/ENqAid9wGu #79. How many are in step 9? What is the equation?

I gave this to my 8th-grade class for our usual VP routine, not expecting an equation. However, Ben tried something & yelled, "It works!" What did he try? pic.twitter.com/LBkUD8Xpxt

— Fawn Nguyen (@fawnpnguyen) December 31, 2024

A problem that may not be as hard as it looks
Curriculum Tags: MTH1W
https://x.com/GeometryPuzzles/status/1873564341624262664

Try to solve this pic.twitter.com/fZHnoerUT9

— Math Lover (@GeometryPuzzles) December 30, 2024

You can find data anywhere
Curriculum Tags: MDM4U
https://x.com/simongerman600/status/1873805258649989610

Frequency of letters in English words and where they occur in the word. Did you know that J was the most uncommon letter? @neilrkaye always comes up with the best material! Source: https://t.co/T86PSd79NU pic.twitter.com/s0AGEnHNFI

— Simon Kuestenmacher (@simongerman600) December 30, 2024

I call this the bathingsuit problem :-)

Curriculum Tags: MTH1W
https://x.com/CoreMath80/status/1873411910131122176

#math pic.twitter.com/2uVWQIdrha

— Core Math, India (@CoreMath80) December 29, 2024