Math Links for Week Ending Aug 28th, 2026

Featured Links

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

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

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

Resource Links

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

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

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

Video Links

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

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

- Immanuel Kant pic.twitter.com/3DcgbpUDYO

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

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

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

Image Links

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

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

— Howie Hua (@howie_hua) August 28, 2026

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

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

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

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

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

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

Mathematics.

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

— Cliff Pickover (@pickover) August 27, 2026

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

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

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

Math Links for Week Ending Aug 7, 2026

Featured Links

Normally we see classic NCTM Calendar problems from @KarenCampe but something slightly different this month with "Palette of Problems"
Curriculum Tags: All
https://karendcampe.wordpress.com/2026/08/02/august-calendar-problems-3/

The #ProblemSolving Calendar is back! (sort of). Check out the August Palette of Problems to set the stage in math class this school year. #MTBoS #iTeachMath #T3Learns #RecreationalMath #MathSky #MathsToday karendcampe.wordpress.com/2026/08/02/a...

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— Karen Campe (@karencampe.bsky.social) August 2, 2026 at 2:24 PM

Resource Links

More shared resources 
Curriculum Tags: All
https://www.resourceaholic.com/2026/08/5-maths-gems-201.html

New! My 201st gems post. Ideas, updates and resources for maths teachers. 💎 www.resourceaholic.com/2026/08/5-ma... #mathstoday #ukmathschat #alevelmaths

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— Jo Morgan (@mathsjem.bsky.social) August 3, 2026 at 4:56 AM

Video Links

Math is everywhere, but, yeah, this is cool
Curriculum Tags: All

https://x.com/pickover/status/2085419972830896350

→ Math, Geometry, Ingenuity.

→ Alternative to complex robotic arms for reorienting products.

Credit: I didn’t upload this video to 𝕏. I’m pointing to a video residing in the 𝕏 stream of “Advanced humanoid forum”, 𝕏 ID “CobotUli” (Aug 5, 2026). pic.twitter.com/F5S9K5J0cT

— Cliff Pickover (@pickover) August 6, 2026

Image Links

A catenary is often mistaken for a parabola. 
Curriculum Tags: MPM2D, MCR3U, MCF3M, MBF3C
https://x.com/pickover/status/2083372449224065419

Our beautiful mathematical universe.

A chain hanging from points forms a "Catenary Curve." https://t.co/UPJgegOJYB pic.twitter.com/2bVEoBBfC6

— Cliff Pickover (@pickover) August 1, 2026

Math Links for Week Ending July 24th, 2026

Featured Links

I love being able to visualize these sums. The cube one is pretty cool
Curriculum Tags: MCR3U
https://youtu.be/cOTf_YEmSOU?si=OT7-b1mLmtNwTyHG

Resource Links

This is one of the OG math resources. And now it's got an update
Curriculum Tags: All
https://visualpatterns.org/

So excited to share I found a way to keep visual patterns up for good—and it got a great new makeover too! Check it out: fawnnguyen.substack.com/p/visual-pat...

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— Fawn Nguyen (@fawnnguyen.substack.com) July 23, 2026 at 7:35 PM

Video Links

I like the idea of discussing what happens with sums of series. 
Curriculum Tags: MCR3U
https://x.com/howie_hua/status/2080404304440201556

Can you believe it? This series can converge to any real number we want just by rearranging the terms. pic.twitter.com/7MVJQBnNcP

— Howie Hua (@howie_hua) July 23, 2026

I did not know that the ? of a number is called the Terminal
Curriculum Tags: All
https://x.com/howie_hua/status/2078947472593100823

Did you know a question mark means something in math? 😱 pic.twitter.com/cI6FBnO4Qx

— Howie Hua (@howie_hua) July 19, 2026

Image Links

Sure it's physics, but that is the language of math
Curriculum Tags: All
https://bsky.app/profile/curiouspolymath.bsky.social/post/3mqpwtwyty22n

#Mathsky

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— Pete Wung The Curious Polymath (@curiouspolymath.bsky.social) July 15, 2026 at 8:05 PM

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 25th, 2026

Featured Links

I think it's important for kids to work on problems like this, either in groups or individually. 
Curriculum Tags: All

https://bsky.app/profile/stevemaths.bsky.social/post/3mongp2hsfk2s

Here's a slight twist on an arithmetic grid for this week's #OCRMathsPuzzle. Find the values for p and q so that the arithmetic grid below can be completed. #MathsToday #UKMathsChat #RecreationalMath @cambridgeocr.bsky.social

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— Steve Walker (@stevemaths.bsky.social) June 19, 2026 at 9:21 AM

Resource Links

If you are using Desmos Notebook then you can't have enough resource to help "pimp" your pages out
Curriculum Tags: All

https://bsky.app/profile/desmos.com/post/3mp7mg3ugh22e

Connected variables and tokens bring all your Notebook elements together. What question should we answer next? #iteachmath #mathsky

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— Desmos Studio (@desmos.com) June 26, 2026 at 2:51 PM

Video Links

I like anything that helps visualize completing the square
Curriculum Tags: MPM2D,  MCR3U, MCF3M, MBF3C

https://x.com/howie_hua/status/2068707217973354815

I wish I was shown how we can visually derive the difference of two squares formula pic.twitter.com/nzWVIo6AOP

— Howie Hua (@howie_hua) June 21, 2026

Image Links

I can't get enough mathematical art
Curriculum Tags: All

https://bsky.app/profile/helsig.bsky.social/post/3mp7lkwgjo22t

Circle packing within a spiral lattice. #CreativeCoding #MathArt #MathSky #phyllotaxis #SciArt

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— Daniel Wilson (@helsig.bsky.social) June 26, 2026 at 2:36 PM

Math Links for Week Ending June 19, 2026

Featured Links

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

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

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

Resource Links

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

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

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

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

Video Links

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

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

— Howie Hua (@howie_hua) June 19, 2026

Image Links

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

Messi xkcd.com/3260/

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

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

Math Links for Week Ending June 12, 2026

Featured Links

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

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

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

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

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

Resource Links

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

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

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

— Karen Campe (@KarenCampe) May 1, 2026

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

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

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

Video Links

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

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

— Howie Hua (@howie_hua) June 12, 2026

Image Links

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

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

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

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

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

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

Math Links for Week Ending May 1, 2026

Featured Links

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

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

— David Petro (@davidpetro314) April 30, 2026

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

— David Petro (@davidpetro314) May 1, 2026

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

— David Petro (@davidpetro314) May 1, 2026

Resource Links

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

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

— David Petro (@davidpetro314) April 30, 2026

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

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

— David Petro (@davidpetro314) April 30, 2026

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

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

— David Petro (@davidpetro314) April 30, 2026

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

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

— David Petro (@davidpetro314) May 1, 2026

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

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

— David Petro (@davidpetro314) May 1, 2026

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

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

— David Petro (@davidpetro314) April 30, 2026

Video Links

A nice simple visualization of this classic probability problem. 

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

This is a very common misconception in statistics:

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

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

— Howie Hua (@howie_hua) April 26, 2026

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

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

— Howie Hua (@howie_hua) April 29, 2026

Image Links

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

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

— David Petro (@davidpetro314) April 30, 2026

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

What is the purpose of teaching math? - @pwharris

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

— David Petro (@davidpetro314) April 30, 2026

Math Links for Week Ending Apr 24, 2026

Featured Links

Who doesn't want a large bank of challenging math problems?
Curriculum Tags: All
https://phys.org/news/2026-04-world-largest-olympiad-math-problems.html

phys.org/news/2026-04... World's largest collection of Olympiad-level math problems now available to everyone #Math #Maths #MathSky #MathOlympiad #iteachmath

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— Dawn Del Vecchio (@dawndelvecchio.bsky.social) April 23, 2026 at 5:09 PM

Resource Links

It's too late for Fawn but you can still check out the last one in this series or the summaries on the podcast
Curriculum Tags: All 
https://www.strongermath.com/mrc/

Hi hi! It's been a while.
I'm excited to share how I facilitate a 𝘃𝗶𝘀𝘂𝗮𝗹 𝗽𝗮𝘁𝘁𝗲𝗿𝗻𝘀 routine! Hope to learn from you also.

𝗦𝘂𝗻𝗱𝗮𝘆, 𝗔𝗽𝗿𝗶𝗹 𝟭𝟵, 𝗮𝘁 𝟭:𝟬𝟬 𝗣𝗠 𝗣𝗦𝗧
Register for the Math Routine Collaborative at https://t.co/mOHBC2r43C@Sneffleupagus pic.twitter.com/pj1LOpQQ67

— Fawn Nguyen (@fawnpnguyen) April 18, 2026

Radicals can be tricky so it's always good to see other approaches
Curriculum Tags: MPM2D, MCR3U, MCF3M
https://karendcampe.wordpress.com/2026/04/22/really-radical/

New blog post! "Really Radical" talks about how to handle teaching a tough topic in #algebra2 so students aren't lost in the weeds. #iTeachMath #MTBoS #T3Learns https://t.co/Qqso24wkwJ

— Karen Campe (@KarenCampe) April 23, 2026

Video Links

I can't get enough probability questions
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/2047435455516549402

The probability of finding a Pikachu in Viridian Forest is 5% so you just need 20 encounters to ensure finding a Pikachu, right? Math doesn't work out like that. Let's do the math to find the probability of encountering at least one Pikachu in 20 encounters. pic.twitter.com/iQSQCP5CyS

— Howie Hua (@howie_hua) April 23, 2026

Image Links

A nice area related question
Curriculum Tags: MTH1W
https://bsky.app/profile/stevemaths.bsky.social/post/3mkadudzuk22w

Here is the first #OCRMathsPuzzle of the summer term. Diagram shows a square ABCD with quarter circles drawn with centres at A and B, radius equal to the side length. What percentage of the square has been covered by the quarter circles? #UKMathsChat #MathsToday @cambridgeocr.bsky.social

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— Steve Walker (@stevemaths.bsky.social) April 24, 2026 at 6:44 AM

Math Links for Week Ending Apr 17, 2025

Featured Links

When I saw this show up in my Facebook feed, I thought for sure it had to be fake. But no, it's real
Curriculum Tags: All
https://www.calculator.org/calculators/Casio_QL-10.html

I saw this come across one of my feeds and I thought it was fake. But it turns out that in 1979, the #Casio "Calculighter" was legit www.calculator.org/calculators/... #MathChat #MTBoS #iTeachMath

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— DavidPetro314 (@davidpetro314.bsky.social) April 17, 2026 at 5:52 PM

Resource Links

The idea of sharing resources is the best reason to be in a space like this. The old Twitter Matheverse was great but it's getting better on Bluesky. Keep sharing, everyone
Curriculum Tags: MCR3U
https://bsky.app/profile/theericklee.bsky.social/post/3mjkzz76xd22e

Gave this warmup question to my class today. Students had to think carefully about the function and what x represents in each statement. Great discussions. @studymaths.bsky.social #ITeachMath #MathSky

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— Erick Lee (@theericklee.bsky.social) April 15, 2026 at 7:22 PM

Video Links

I'm not a fan of math "tricks" but I am a fan of anyone who can explain why they work
Curriculum Tags: Gr8, MTH1W
https://x.com/howie_hua/status/2044875275566268435

Visually showing why "keep change flip" works pic.twitter.com/EbxAUwr7F0

— Howie Hua (@howie_hua) April 16, 2026

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This is a good lesson in the Commutative Property of multiplication and also the idea of trying to do a similar problem that is easier but has the same answer. 
Curriculum Tags: Gr8, MTH1W
https://bsky.app/profile/pwharris.bsky.social/post/3mjnkqgjzwc2h

#TryThisThursday Try Would You Rather as such a great routine to get students thinking and sharing about mathematical relationships. Which is your favorite and why? #MathIsFigureOutAble #MTBoS #ITeachMath #MathEd

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— Pam Harris (@pwharris.bsky.social) April 16, 2026 at 7:27 PM

Math Links for Week Ending Mar 6th, 2026

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Our last episode of the season is where we ask all of the guests the same question and hear their response. This year we asked "What advice would you give a new teacher who is struggling to engage their math students?" Here are the results
Curriculum Tags: All
https://talks.oame.on.ca/season-8

[New Podcast] This is our last episode of the season where we asked all of our guests advice about engaging students. Featuring @realjmitchell.bsky.social @pwharris.bsky.social @cluzniak.bsky.social @themathguru.bsky.social &more Listen here: talks.oame.on.ca/season-8 #MathChat #MTBoS #iTeachMath

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— DavidPetro314 (@davidpetro314.bsky.social) March 3, 2026 at 8:45 PM

Resource Links

@KarenCampe continues to post classic NCTM calendar problems and I appreciate it
Curriculum Tags: All
https://karendcampe.wordpress.com/2026/03/01/march-calendar-problems-4/

The March Calendar of Problems is here! Enjoy some #ProblemSolving yourself or with students. Let us know your thoughts & working-out here or on post. #MTBoS #iTeachMath #T3Learns #RecreationalMath #MathChathttps://t.co/gfAsr8hdI7

— Karen Campe (@KarenCampe) March 1, 2026

Video Links

The area model to the rescue
Curriculum Tags: MPM2D, MCR3U, MCF3M, MBF3C
https://x.com/howie_hua/status/2030035682937405728

Let's learn how to factor by grouping and why it works pic.twitter.com/2BTLwRYsPY

— Howie Hua (@howie_hua) March 6, 2026

I'm thinking there is a sequence and/or series (or maybe a linear relations) question lurking in this video 
Curriculum Tags: MTH1W, MCR3U
https://x.com/davidpetro314/status/2030063900247433472

What #math problem could you ask about this video?#MathChat #MTBoS #iTeachMath https://t.co/k9wjXIOgSz

— David Petro (@davidpetro314) March 6, 2026

Image Links

Who doesn't like geometric art
Curriculum Tags: All
https://bsky.app/profile/veganjackson.bsky.social/post/3mgdsh6lt6v2i

Math Links for Week Ending Feb 27, 2026

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Even though for most curriculum we don't care about the surface area of a toroid, it could be easily worked in with this context. 
Curriculum Tags: MTH1W
https://youtu.be/CYjD9cpxT18?si=DQvqTExD8SLtzwCM

Resource Links

Open middle is a great structure to have kids think deeply. Here's one about perpendicular lines
Curriculum Links: MTH1W
https://www.openmiddle.com/perpendicular-lines-through-a-given-point/

If your students are learning about perpendicular lines, try out this Open Middle problem from Andy Schwen with them: www.openmiddle.com/perpendi...

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— Robert Kaplinsky (@robertkaplinsky.com) February 27, 2026 at 6:43 PM

I'm always happy to share summary posts like this one
Curriculum Tags: All
https://www.resourceaholic.com/2026/02/5-maths-gems-196.html 

New! My 196th gems post. Ideas, updates and resources for maths teachers.https://t.co/FgEC1lfnOY#mathsgems #mathschat #teammaths #mathscpdchat #mathstlp pic.twitter.com/lWClAxRpik

— Jo Morgan (@mathsjem) February 17, 2026

Video Links

As always, I like the fact that the reason why is explained
Curriculum Tags: MCR3U, MCF3M
https://x.com/howie_hua/status/2027134778953409006

One of the biggest "tricks" in algebra is "slide and divide." I honestly didn't understand why it worked until around 20 years after algebra class. Here's why it works. pic.twitter.com/eRyOqFhwbj

— Howie Hua (@howie_hua) February 26, 2026

Visualizing factoring 
Curriculum Tags: MTH1W
https://x.com/howie_hua/status/2025303867903369621 

I wish I was taught this way of finding the greatest common factor when I was in school pic.twitter.com/7N87KSYsoB

— Howie Hua (@howie_hua) February 21, 2026

I always liked showing the connection between permutations and combinations
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/2026390576086884641

The permutation and combination formulas don't just have to be formulas to memorize. Here's how we can derive them. pic.twitter.com/i2vjZwH94b

— Howie Hua (@howie_hua) February 24, 2026

Image Links

This would be a good discussion in class
Curriculum Tags: MTH1W
https://bsky.app/profile/mathspadnicola.bsky.social/post/3mfu655uwek2i

#mathstoday

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— Nicola Waddilove (@mathspadnicola.bsky.social) February 27, 2026 at 11:49 AM

Math Links for Week Ending Jan 30th, 2026

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I have known about this software for more than a decade and was just reminded of it. I love it for doing some real projectile motion analysis in your classes. Start throwing stuff around and doing some math (and physics)
Curriculum Tags: MCR3U, MCF3M
https://opensourcephysics.github.io/tracker-website/

Free open source software, Tracker, that lets you upload videos of moving objects & easily move frame by frame to mark the object's motion. Perfect for both #physics and #math class https://t.co/30KvoyCfgi#MathChat #MTBoS #iTeachMath #ProjectileMotionhttps://t.co/pIfvF2rsxK

— David Petro (@davidpetro314) January 26, 2026

Resource Links

Increasing opportunities for risk taking is important in any class, but especially math class
Curriculum Tags: All
https://www.edutopia.org/article/helping-students-learn-try-math

By explicitly talking to students about what trying in the classroom means, you can help them build the independence and resilience they need to tackle problems within their lessons and beyond. 💫 #MathSky #ITeachMath #EduSky

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— Edutopia (@edutopia.org) January 28, 2026 at 11:17 AM

Video Links

This is a very cool property. And if you want a Desmos version, here you go.
Curricuulum Tags: MTH1W
https://x.com/pickover/status/2016872144248934727

Mathematics.

→ "Hidden secret in every triangle."

Credit: saroa_academy. I didn’t upload this video to 𝕏. I’m pointing to a video residing in the 𝕏 stream of “S.T.E.M Explorer”, 𝕏 ID “stemexplor” (Jan 28, 2026). pic.twitter.com/43MmOPZmbD

— Cliff Pickover (@pickover) January 29, 2026

I know about multiplying via rectangles so I guess in it makes sense you can divide using them
Curriculum Tags: All
https://x.com/howie_hua/status/2016970442125561964

Let's learn how to divide using rectangles pic.twitter.com/mJwKHumxbu

— Howie Hua (@howie_hua) January 29, 2026

Image Links

20th Century pattern blocks to the rescue
Curriculum Tags: All
https://bsky.app/profile/murrayh83.bsky.social/post/3mdnxm6uj5s2m

Looking back at the snowflake designs created in January! #21CenturyPB #PatternBlocks #CuisenaireRods #iTeachMath

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— Hana Murray (@murrayh83.bsky.social) January 30, 2026 at 1:46 PM

Math Links for Week Ending Jan. 23rd, 2026

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This site has been around for more than a decade so it was great to get a reminder of it. What a great connection of art, data and infographics.
Curriculum Tags: MDM4U
https://www.dear-data.com/theproject

via my favorite librarian www.dear-data.com/theproject pretty amazing #mathart #dataviz project

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— John Golden (@johngolden.bsky.social) January 19, 2026 at 2:07 PM

Resource Links

I have always been a fan of Slow Reveal Graphs and you should be too. Here is a collection from @marktrushkowsky.bsky.social that deals with many of the current events that are in the news right now. Thanks to @benjamindickman.bsky.social for pointing it out.
Curriculum Tags: MDM4U
https://www.collectedny.org/2026/01/slow-reveal-graphs-current-events/

Video Links

It's always good to have a mechanical way to prove geometric theorems
Curriculum Tags: MAT1W
https://x.com/TimBrzezinski/status/2014109261035442607

No tech. Just paper. Pure simplicity. Here, an effective means for students to explore any polygon’s exterior angles. #mathematics #geometry pic.twitter.com/kzue5KuGET

— Tim Brzezinski (@TimBrzezinski) January 21, 2026

This makes total sense but I have never taught it this way
Curriculum Tags: MCR3U
https://x.com/howie_hua/status/2013705992761156018

Let's learn how to evaluate fractional exponents pic.twitter.com/0yjyX9U5DS

— Howie Hua (@howie_hua) January 20, 2026

Image Links

Let the math memes continue
Curriculum Tags: MCR3U
https://bsky.app/profile/curiouspolymath.bsky.social/post/3mcwwbwl5ks2u

#mathsky

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— Pete Wung The Curious Polymath (@curiouspolymath.bsky.social) January 21, 2026 at 9:51 AM

Math Links for Week Ending Jan 16th, 2026

Featured Links

I don't think you can never have enough resources with "mind benders". So here's a new one that's got @3Blue1Brown at the helm
Curriculum Tags: All
https://momath.org/mindbenders/

Monthly Mind-benders puzzles from Peter Winkler and @3blue1brown.com! A great team together with @momath.bsky.social. The first puzzle is out now. #ITeachMath momath.org/mindbenders/

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— Erick Lee (@theericklee.bsky.social) January 16, 2026 at 2:44 PM

Resource Links

I think that looking at "tricks" like this in terms of why they work is always a good thing.
Curriculum Tags: All
https://bsky.app/profile/mathowitz.bsky.social/post/3mckpwpv42s2v

How to divide a number by 5. Double the number. Move the decimal place one unit to the left. You're welcome. 4283/5 8566 856.6 It's *magic* (and i'm sure it has nothing to do with the fact that 5=10/2 😜)

— Carl (@mathowitz.bsky.social) January 16, 2026 at 1:26 PM

Video Links

I think it's always good to know why algorithms work
Curriculum Tags: MPM2D, MCR3U, MCF3M
https://bsky.app/profile/howiehua.bsky.social/post/3mci3tuvhgc2x

Let's learn how to factor quadratics where the leading coefficient isn't 1 without guessing and checking. (Okay I know that sounds boring but I like this video lol)

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— Howie Hua (@howiehua.bsky.social) January 15, 2026 at 12:21 PM

I think a little geometry could help discover why this works. Here it is in Desmos. When you see it, it makes total sense and all that matters is one piece of wood is twice the width of the other.
Curriculum Tags: MTH1W
https://x.com/Rainmaker1973/status/2012204392494121148

90° angle wood cutting trick

[📹 enticestudio]pic.twitter.com/iNS2ESGies

— Massimo (@Rainmaker1973) January 16, 2026

Image Links

What a great question to ask students
Curriculum Tags: All
https://bsky.app/profile/afetter29.bsky.social/post/3mcizop4nki2z

Here’s an addition to #NoticeWonder. #ElemMathChat

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— afetter29.bsky.social (@afetter29.bsky.social) January 15, 2026 at 9:15 PM