Math Links for Week Ending July 17th, 2026

Featured Links

I have always liked @SimonKuestenmacher's shares but I like when other teachers like @MaryBourassa, see the connections to math class. In this case with fractions
Curriculum Tags: Gr7, Gr8, MTH1W
https://bsky.app/profile/marybourassa.bsky.social/post/3mqk26esj722o

The world’s 8.2 billion people, shown as a single tree map. India and China dominate, Africa is already nearly twice the size of Europe, and Australia barely registers. Source: buff.ly/P5OtmPg

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— Simon Kuestenmacher (@simongerman600.bsky.social) July 13, 2026 at 8:01 AM

Resource Links

You can never have too many Calculus resources. 
Curriculum Tags: MCV4U
https://ocw.mit.edu/courses/res-18-001-calculus-fall-2023/

FREE Math Book. 705 pages.

"Calculus" by Strang. Highly recommended for its clear explanations and practical engineering focus.
1. Intro
2. Derivatives
3. Applications of Derivatives
4. Derivatives and the Chain Rule
5. Integrals
6. Exponentials and… pic.twitter.com/YUh5bqUDcp

— Cliff Pickover (@pickover) July 12, 2026

Video Links

I think the comparison to the word diagonal is a good way to do this. 
Curriculum Tags: All
https://x.com/howie_hua/status/2078170427864850554

How to pronounce pentagonal, hexagonal, heptagonal, and polygonal pic.twitter.com/36ARdE9moP

— Howie Hua (@howie_hua) July 17, 2026

Image Links

I love this for having students show that they know the connections between functions and their first and second derivatives.
Curriculum Tags: MCV4U
https://x.com/pickover/status/2076124990466892099

Mathematics.

Need an exam question for Calculus? Which graph is f, f’, and f” ? (by @dansmath, used with permission). pic.twitter.com/a8joMByNdv

— Cliff Pickover (@pickover) July 12, 2026

Some similar angles and algebra for your students
Curriculum Tags: MPM2D, MCR3U
https://x.com/jamestanton/status/2076160370675154953

How we left our rakes today reminder me of a famous math puzzle.
What's h in terms of a and b?
[Curiously, the answer does not depend on how far apart the walls are!] pic.twitter.com/dw1wzBCAyX

— James Tanton (@jamestanton) July 12, 2026

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

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— 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

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

Math Links for Week Ending Apr 3, 2026

Featured Links

I love this visual
Curriculum Tags: MCV4U
https://x.com/howie_hua/status/2038341287603282340

You can do this calculus problem with just any random book 😱 pic.twitter.com/LGndHMlJ81

— Howie Hua (@howie_hua) March 29, 2026

Resource Links

You can never have enough sources of resources
Curriculum Tags: All
https://www.resourceaholic.com/2026/04/5-maths-gems-197.html

New! My 197th gems post. Ideas, updates and resources for maths teachers. 💎 www.resourceaholic.com/2026/04/5-ma... #ukmathschat #mathstoday #alevelmaths

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— Jo Morgan (@mathsjem.bsky.social) April 3, 2026 at 6:40 AM

The latest classic NCTM calendar
Curriculum Tags: All
https://karendcampe.wordpress.com/2026/04/01/april-calendar-problems-4/

The April #ProblemSolving Calendar is posted & that's no fooling!!
Plus March solutions as well.
Share your working out & thoughts here or on the post. #iTeachMath #MTBoS #MathsToday#RecreationalMath #MathChathttps://t.co/yAZPMe109h

— Karen Campe (@KarenCampe) April 2, 2026

 

Video Links

People complain that things are worse now. The data says otherwise
Curriculum Tags: MDM4U
https://x.com/toddrjones/status/2039771217553461667

Here are some ways in which the world has gotten better. pic.twitter.com/v1Py5NtQ7L

— Todd Jones 🦊 (@toddrjones) April 2, 2026

Fibonacci to the party
Curriculum Tags: All
https://x.com/howie_hua/status/2039721193918648801

Let's learn about the golden ratio pic.twitter.com/iMnoH4d8Qd

— Howie Hua (@howie_hua) April 2, 2026

Image Links

Very nice prompt
Curriculum Tags: Gr7, Gr8, MTH1W
https://bsky.app/profile/mathsvault.bsky.social/post/3milwnnonl52w

Discuss — Factors of a number #maths #mathsteacher #UKMathsChat #GCSEMaths #MathsChat #Discussion #MathsDiscussion #TalkTasks #FactorsOfANumber

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— Jon @ The Maths Vault (@mathsvault.bsky.social) April 3, 2026 at 10:30 AM

Another nice prompt
Curriculum Tags: Gr7, Gr8, MTH1W
https://bsky.app/profile/tilefarmer.bsky.social/post/3mikm2thrvk26

#ElemMathChat Q7 “Last Tile Standing” is another one of my favorites (for Tile Farm’s version go to tiletalk.tilefarm.com). I’ve chosen one of the 24 patterns above, can you think of yes/no questions that could help eliminate options? Ask and I’ll answer yes/no. Can comment below if easier.

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— Alex Romero (@tilefarmer.bsky.social) April 2, 2026 at 9:48 PM

Math Links for Week Ending Feb 20th, 2026

Featured Links

This is an old video but still pretty cool
Curriculum Tags:All
https://www.youtube.com/watch?v=pg1NpMmPv48

#Mathsky youtube.com/watch?v=pg1N...

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— Pete Wung The Curious Polymath (@curiouspolymath.bsky.social) February 20, 2026 at 8:06 PM

Resource Links

I have always liked the idea of warmup questions. Something for kids to do as soon as they step in the door. Nothing too crazy, maybe with different levels of difficulty. And even though these examples are for Calculus, the idea is universal.
Curriculum Tags: MCV4U
https://bsky.app/profile/theericklee.bsky.social/post/3mfcymi3r3c2r

A few warm-up questions from this week in my high school Calculus class. I start each day with a question. Sometimes for review/retrieval, sometimes to launch the day's discussion and sometimes for practice/consolidation. #ITeachMath #MathsToday

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— Erick Lee (@theericklee.bsky.social) February 20, 2026 at 3:55 PM

Video Links

Both models are correct and necessary
Curriculum Tags: Gr7, Gr8
https://x.com/howie_hua/status/2024891678977655292

I know a lot of people think about 3 ÷ 1/2 as "how many 1/2 fit into 3?" but there is another model!

Here are two ways we can think about division. pic.twitter.com/k5WbJI0Wtv

— Howie Hua (@howie_hua) February 20, 2026

Image Links

Asking for questions is a good way to get more students involved. Especially for students that struggle and for students that excel, you can give them a specific topic. 
Curriculum Tags: All
https://bsky.app/profile/teacher2teacher.bsky.social/post/3mew3e35zia27

A change in perspective can make all the difference! T Kathy Minas (themathcollective on IG) mixes it up by giving the answer first – and asking learners for the question: www.instagram.com/p/DO1o9bSEmr9/ #MTBoS

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— Teacher2Teacher (@teacher2teacher.bsky.social) February 15, 2026 at 12:40 PM

Math Links for Week Ending Oct 24th, 2025

Featured Links

Student voice is so important in math class
Curriculum Tags: All
https://www.youtube.com/watch?v=YPvpfOl-lIw

NCTM 2025 in Atlanta was inspiring! Please watch the IGNITE talk by my mentor, Dr. Dawn Pilotti on how to fix Mathematics education for students with learning differences. youtu.be/YPvpfOl-lIw #iTeachMath ♾️ #MTBoS #EduSky #MathSky

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— emmalalas.bsky.social (@emmalalas.bsky.social) October 19, 2025 at 9:39 PM

Resource Links

I never miss a chance to share this article "Never Say Anything a Kid Can Say"
Curriculum Tags: All
https://hybridalgebra.pbworks.com/f/Never+Say+Anything+a+Kid+Can+Say.pdf

I love this timeless article from Steven C. Reinhart about teacher moves in the math classroom that help get kids doing more of the communicating (instead of the teacher). One of my absolute favorites: https://t.co/iqnKI70LSg pic.twitter.com/mie8FyPR7T

— Robert Kaplinsky (@robertkaplinsky) October 18, 2025

Video Links

Fooling around with factorials? Try this
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/1979920355134189757

Which is larger: 100!×100! or 99!×101! ? pic.twitter.com/TaEzaZusiz

— Howie Hua (@howie_hua) October 19, 2025

Image Links

I would give this as a bonus question where they would have to explain both the calculus portion and the relationship portion :-)
Curriculum Tags: MCV4U
https://x.com/mathladyhazel/status/1981173929764147381

This calculus joke 😂 pic.twitter.com/mQ6wO0QeQz

— Math Lady Hazel 🇦🇷 (@mathladyhazel) October 23, 2025

A mash up of thinking classrooms and math therapy
Curriculum Tags: All
https://x.com/TheMathGuru/status/1978139136121860298

From my presentation w @pgliljedahl at @MathEdLeaders - we are all better together 🧡🩷 https://t.co/BeMHpYcfZE

— vanessa vakharia (@TheMathGuru) October 14, 2025

Math Links for Week Ending Oct 10th, 2025

Featured Links

I know that there have been many secondary teachers waiting for this set of problems. Here's a sample
Curriculum Tags: All
https://x.com/pgliljedahl/status/1976088834212515884

Here's a sneak peek to Task 30: Graphing Linear Equations! https://t.co/gJhlhhJwnb

— Peter Liljedahl (@pgliljedahl) October 9, 2025

Resource Links

The Visual Patterns website has been around for a while but 500 patterns is still impressive
Curriculum Tags: All
https://x.com/fawnpnguyen/status/1975287062980141411

We now officially have 500 visual patterns! 🎉

Christophe from France just shared SIX wonderful building-brick patterns he discovered while playing with his daughter. 💕

Check out visual patterns #495-500: https://t.co/hobByX78Su pic.twitter.com/drwRrFh7Ki

— Fawn Nguyen (@fawnpnguyen) October 6, 2025

Video Links

If your students are learning about squares of numbers, this might be the kernel for an interesting activity about creating any odd number with the difference of squares
Curriculum Tags: Gr8, MTH1W
https://x.com/howie_hua/status/1975570637109518668

Fun mental math trick: All odd numbers can be written as the difference of two consecutive square numbers. Here's how we can do this mentally. pic.twitter.com/MDeJ5vnbxj

— Howie Hua (@howie_hua) October 7, 2025

Is he right? Have your students test it out
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/1976032229643141302

Don't roast me if I am wrong but I THINK I found a new way of finding the harmonic mean???

I couldn't find any source explaining it like this, but even if it isn't new, I think it's a good way of explaining what the harmonic mean wants. pic.twitter.com/K2kMWGbirg

— Howie Hua (@howie_hua) October 8, 2025

Image Links

Math is everywhere
Curriculum Tags: MCV4U
https://x.com/pickover/status/1973775091617153511

Mathematics. Tattoos. (Image circulating widely on the Web.) pic.twitter.com/qmDHStoy6I

— Cliff Pickover (@pickover) October 2, 2025

I have always liked this fallacy based on dividing by zero
Curriculum Tags: All
https://x.com/pickover/status/1976105777799770232

Mathematics.

At bottom, we conclude that "2 = 1". pic.twitter.com/aEEkKWL8Hw

— Cliff Pickover (@pickover) October 9, 2025

Math Links for Week Ending Sept 26, 2025

Featured Links

Who doesn't like a bit of math and art. Here are a bunch of sites where you can purchase some mathematical art. From T-shirts to posters to sculptures. 
Curriculum Tags: All
https://www.diffgeom.org/misc/math_shops.html

Although my online shop Differential Geometry is a primary source of income, I maintain (on a static html site) a list of other creators' mathematical online shops: www.diffgeom.org/misc/math_sh... I hope you will browse and support us all! #MathSky #MathArt #ITeachmath #SmallBusiness

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— Original Math Designs (@diffgeom.com) September 21, 2025 at 10:38 AM

Resource Links

It's funny because it's true
Curriculum Tags: All
https://theonion.com/majority-of-americans-never-use-physical-education-afte-1819570362/

I love The Onion's parody of the often heard "When will I ever use this?" comment but applied to physical education: https://t.co/nh4AsQuYrJ pic.twitter.com/mOuCp1oUMR

— Robert Kaplinsky (@robertkaplinsky) September 20, 2025

I never miss a chance to promote Slow Reveal Graphs
Curriculum Tags: All
https://www.edutopia.org/article/using-graphs-promote-data-literacy-elementary-school

By revealing graphs piece by piece, teachers can build student curiosity and guide them to more effectively make sense of data! 📊 #DataLiteracy #EduSky #MathSky

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— Edutopia (@edutopia.org) September 20, 2025 at 10:34 PM

Video Links

I like being able to visualize something that you never thought you could
Curriculum Tags: MTH1W, MPM2D
https://x.com/howie_hua/status/1969764417563967740

Did you know that we can visually see why sqrt(40)=2sqrt(10)? Let's see how we can visualize rewriting square roots! pic.twitter.com/WHHcV4obkL

— Howie Hua (@howie_hua) September 21, 2025

Image Links

Calculus humour
Curriculum Tags: MCV4U
https://x.com/pickover/status/1969477890753331220

Suzy, studying math, warps reality. Math joke for cats. pic.twitter.com/v9UQhWPv9Q

— Cliff Pickover (@pickover) September 20, 2025

Math Links for Week Ending Apr. 11th, 2025

Featured Links

I really like this problem because you can take a brute force method with skills as complex as those found in gr7 & 8 or take it all the way to Calculus. I threw my hat with a dynamic geometry solution here. 
Curriculum Tags: All
https://x.com/jamestanton/status/1908437200653468022

Warm up:
Where on the diagonal should the dot be placed so that the sum of areas of the two squares is as small as possible? pic.twitter.com/S51tNtmKJM

— James Tanton (@jamestanton) April 5, 2025

Resource Links

As a calculus teacher I always found I never had enough resources to teach related rates. 
Curriculum  Tags: MCV4U
https://bsky.app/profile/theericklee.bsky.social/post/3lm653o3o5s2w

I don't know what my students will think but I had a lot of fun making this problem. #ITeachMath teacher.desmos.com/activitybuil...

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— Erick Lee (@theericklee.bsky.social) April 6, 2025 at 3:02 PM

Video Links

I always like a good visual proof of an infinite series
Curriculum Tags: MCR3U, MHF4U, MCV4U
https://x.com/howie_hua/status/1910118057080725712

Finding 1/2 + 1/4 + 1/8 + 1/16 + ... by drawing: pic.twitter.com/8I1Q07xnTU

— Howie Hua (@howie_hua) April 9, 2025

I never get tired of this animation
Curriculum Tags: Gr8, MTH1W
https://x.com/Matematickcom/status/1910253679401185742

Beautiful visualization 👍 pic.twitter.com/gyi1L0B4TP

— Matematickcom (@Matematickcom) April 10, 2025

Image Links

Makes sense to me
Curriculum Tags: All
https://bsky.app/profile/motivickyle.bsky.social/post/3lm3jfmbdts24

From my kiddo's school's math event 😍 🧮

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— χle Ormsby (@motivickyle.bsky.social) April 5, 2025 at 2:04 PM

Math Links for Week Ending Apr 4th, 2025

Featured Links

Even though we can't see the presentations, I think the summaries offer some good ideas. This one is my favourite: " Don't focus on getting info INTO students' brains, more on getting info OUT!". Check out the original post to see all of the 7 for 7 presentations at the TI conference. 
Curriculum Tags: All
https://bsky.app/profile/karencampe.bsky.social/post/3lljf4p47uc2j

Last not least @jgough Jill Gough: Visualization in a Language-Rich Mathematics Class Don't focus on getting info INTO students' brains, more on getting info OUT! What is the movie you are making in your mind? Verbalize/visuals for deep learning #T3Learns #T3IC #iTeachMath

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— Karen Campe (@karencampe.bsky.social) March 29, 2025 at 12:39 PM

Resource Links

Even though some of these are most certainly university level equations, there are definitely equations here that fit into the high school math (and physics) curriculum.
Curriculum Tags: All
https://www.businessinsider.com/17-equations-that-changed-the-world-2014-3

Ian Stewart shared what he calls '17 equations that changed the course of history' www.businessinsider.com/17-equations... ianstewartjoat.weebly.com/equations.html #mtbos #iteachmath #historyOfMath

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— Dilip Barman (@dbarman.bsky.social) April 2, 2025 at 1:12 AM

Here's a nice little applet to visualize normal vectors
Curriculum Tags: MCV4U
https://www.geogebra.org/u/daniel+mentrard

The angle between two planes is a angle
between their normal vectors
Visualization |Animation | Interactive applet@geogebrahttps://t.co/23BUle1Oxk
#geogebra #math #science #iteachmath #mtbos #visualization #elearning @bancoche #physics pic.twitter.com/2G4p3jI7fw

— Daniel Mentrard (@dment37) April 1, 2025

Video Links

I think this could be used when talking about number systems (in terms of triangle numbers) or to conceptualize the patterns that exist in (this particular) sequence. 
Curriculum Tags: MTH1W, MCR3U
https://x.com/howie_hua/status/1907217126634500392

1, 3, 6, 10, ... how can we find the 100th triangular number? pic.twitter.com/RUNgaC6iaV

— Howie Hua (@howie_hua) April 1, 2025

This is a neat visualization that never occurred to me. Try it with your students
Curriculum Tags: MTH1W, MPM2D
https://x.com/howie_hua/status/1908311966017589472

Did you know we can visualize rewriting square roots? I wish I was at least shown this in school. pic.twitter.com/gnTrMGSxQz

— Howie Hua (@howie_hua) April 5, 2025

I know these are simulations, but the math checks out and they would work IRL.
Curriculum Tags: All
https://x.com/mburnsmath/status/1908145074216763552

I love these. https://t.co/5k7rRKDumM

— Marilyn Burns (@mburnsmath) April 4, 2025

Image Links

This seems like the kind of question that has brute force solutions and more elegant solutions (and code based solutions). To me that makes it perfect for all grade levels. 
Curriculum Tags: All
https://bsky.app/profile/makeaproblem.bsky.social/post/3llonl6tnpc2h

Happy Monday! This problem is inspired by the 1971 Canadian Math Olympiad Q7 Which are there more of, 2-digit numbers that are divisible by their 10s digit, or 2-digit numbers that are divisible by their unit digit? #math #maths #ProblemSolving #iteachmath #mathsky

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— Durtles (@makeaproblem.bsky.social) March 31, 2025 at 11:15 AM

Math Links for Week Ending Feb 21, 2024

Featured Links

It's never too early for PiDay resources
Curriculum Tags: All
https://mathequalslove.net/pi-day-jokes/

New on the Blog: Pi Day Jokes mathequalslove.net/pi-day-jokes/ #mtbos #iteachmath #piday #mathsky #edusky

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— Sarah Carter (@mathequalslove.bsky.social) February 20, 2025 at 5:38 PM

Resource Links

I always love resource summaries from other people and @Mathsjem always has good stuff
Curriculum Tags: All
https://www.resourceaholic.com/2025/02/5-maths-gems-186.html

New! My 186th gems post. Ideas, resources and updates for maths teachers. 💎 www.resourceaholic.com/2025/02/5-ma... #ukmathschat #mathstoday #iteachmath

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— Jo Morgan (@mathsjem.bsky.social) February 20, 2025 at 1:04 PM

A new Classic NCTM calendar is posted
Curriculum Tags: All
https://karendcampe.wordpress.com/2025/02/01/february-calendar-problems-3/

Check out the February Calendar of Problems ... I post these old nctm #ProblemSolving calendars each month. #MTBoS #iTeachMath #MathSky #MathsToday #RecreationalMath karendcampe.wordpress.com/2025/02/01/f...

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— Karen Campe (@karencampe.bsky.social) February 20, 2025 at 9:14 AM

Video Links

Any help we can get when talking about the intricacies of dividing by zero is welcomed
Curriculum Tags: All
https://bsky.app/profile/howiehua.bsky.social/post/3liku6pw7n22f

Why can't we divide by 0? (The difference between 1/0 and 0/0) #math #ITeachMath #EduSky youtube.com/shorts/1wt7n...

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— Howie Hua (@howiehua.bsky.social) February 19, 2025 at 5:47 PM

As someone who taught my daughter how to differentiate polynomials when she was in grade 3 (just to show that knowing the mechanics doesn't mean you know the math), I love this
Curriculum Tags: All, MCV4U
https://youtu.be/TzDhdvVg9_c?si=sga6gqYVYVnLfRqy

Here's a nice video by computer scientist Luke Bordonaro (Lukey B. The Physics G, lukebord.com, YouTube channel youtube.com/@LukeyBThePhysicsG ) introducing concepts of calculus to 5th graders. #mathisfun #mtbos #iteachmath

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— dbarman.bsky.social (@dbarman.bsky.social) February 20, 2025 at 1:54 AM

Image Links

I love the visualization of this to help us remember that patterns are important in math
Curriculum Tags: All
https://x.com/CalcInsights_/status/1891359169233445268

Mathematics looks more elegant when you look at it from a perspective of patterns and symmetries...ᝰ.ᐟ pic.twitter.com/Mr9wg55ph4

— Calculus Insights (@CalcInsights_) February 17, 2025

Though I have always said this, I truly appreciate the connection to Scooby Do :-)
Curriculum Tags: MPM2D, MCR3U, MCF3M
https://x.com/howie_hua/status/1891991697698992142

Distance formula is just the Pythagorean Theorem. pic.twitter.com/GKy5l5hkck

— Howie Hua (@howie_hua) February 18, 2025

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