Math Links for Week Ending Sept 11, 2026

Featured Links

I don't think we can talk enough about dyscalculia
Curriculum Tags: All
https://crpe.org/the-missing-piece-in-math-reform-identifying-and-supporting-students-with-dyscalculia/

Dyscalculia may affect 3–8% of school-age children. So why is it so often overlooked? New CRPE research examines what schools and states can do to better identify and support students. crpe.org/the-missing-... #MathEducation #SpecialEducation

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— Great Lakes Center for Education Research and Practice (@greatlakescenter.bsky.social) September 11, 2026 at 12:03 PM

Resource Links

Solving linear equations as a cross word. I like self checking "worksheets"
Curriculum Tags: MTH1W
https://donsteward.blogspot.com/2012/02/linear-equations-crossnumbers.html

Y9 enjoyed reviewing linear equations in #mathstoday with this from the legendary Don donsteward.blogspot.com/2012/02/line...

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— Tom Gough (@mister-gough.bsky.social) September 10, 2026 at 5:26 PM

Video Links

Linear Algebra in the real world :-) Thanks to @JoelBezaire for this one
Curriculum Tags: All
https://bsky.app/profile/joelbezaire.bsky.social/post/3mv6wgtg53227

Another interesting tidbit to add to the list of Devin Cooley fun facts! 📚 (🎥: TT/natalieweyers07)

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— NHL (Bot) (@notnhl.bsky.social) September 10, 2026 at 4:48 PM

A great example of using circle theorems in a physical way (hint - chord, perpendicular bisector)
Curriculum Tags: MTH1W
https://x.com/pickover/status/2098195726358462802

Mathematical marvels, mysteries, and magic. Geometry and the eternal.

Shock your friends. Determine the center of a drawn circle without a straightedge or compass.

By math educator Tim Brzezinski, @TimBrzezinski, Used with permission. pic.twitter.com/BmJL2Jmu0o

— Cliff Pickover (@pickover) September 10, 2026

Image Links

This is a fun problem that can be done with a little bit of intuitive thinking at just about any grade level that knows how to multiply, but I suppose you could also use systems of equations as well
Curriculum Tags: Gr 7, Gr 8, MTH1W, MPM2D, MFM2P
https://bsky.app/profile/segarrogers.bsky.social/post/3mvajqnhmzs2z

I think the maths historians would probably call this a 'surveyors' problem. Am in the process of making a sheet of them ... unless anyone already has such a thing. (The 40 and the 72 are the areas of the rectangles formed by the respective diagonals). #UKMathsChat #iTeachMath

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— Segar Rogers (@segarrogers.bsky.social) September 11, 2026 at 8:07 AM

Math Links for Week Ending May 8th, 2026

Featured Links

I have lots of opinions about appropriate assessment and alternatives to the traditional assessments, so I'm always interested in other ideas
Curriculum Tags: All
https://www.edutopia.org/article/my-5th-graders-taking-math-tests

A math test format that reduces stress for students *and* teachers? Yes, it’s possible! 🙌 Check out how this school gave assessments a makeover. #MathSky #ITeachMath #EduSky

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— Edutopia (@edutopia.org) May 5, 2026 at 6:36 PM

Resource Links

Check out @Mathsjem's list of resources. 
Curriculum Tags: All
https://www.resourceaholic.com/2026/05/5-maths-gems-198.html

New! My 198th gems post. Ideas, updates and resources for maths teachers. 💎 https://t.co/hLENa05kYk

Hat tips to follow. #mathsgems #mathschat #teammaths #mathscpdchat #mathstlp pic.twitter.com/jE7VQ7xCA8

— Jo Morgan (@mathsjem) May 3, 2026

Video Links

A little sense of how you could use thin slicing with trig
Curriculum Tags: MPM2D, MFM2P
https://x.com/TimBrzezinski/status/2050222840897552700

Start of a #ThinkingClassroom thin slice in #geometry class yesterday. @pgliljedahl @BTCthinks #buildingthinkingclassrooms pic.twitter.com/CAcYVUW4JD

— Tim Brzezinski (@TimBrzezinski) May 1, 2026

Some fun with difference of squares
Curriculum Tags: MPM2D, MFM2P
https://x.com/howie_hua/status/2052791346583257283

How did he compute 255²-245² so quickly? Here's a good mental math trick. pic.twitter.com/R25m43eFB7

— Howie Hua (@howie_hua) May 8, 2026

Image Links

Something for next year
Curriculum Tags: All
https://x.com/howie_hua/status/2051331153072717946

May the fourths be "with you"! pic.twitter.com/sGWzKqQWck

— Howie Hua (@howie_hua) May 4, 2026

Math Links for Week Ending Jan 9th, 2025

Featured Links

I have been a Desmos Fellow (now Amplify Fellow) since 2018 and it has given me resources, insight and inspiration. And don't think you have to be a Desmos expert to apply. They are just looking for people with innovative ideas. 
Curriculum Tags: All
https://amplify.com/amplify-classroom-fellows/

Resource Links

I have done this with students but not as a "trick" I like this idea. 
Curriculum Tags: MCR3U, MCF3M
https://bsky.app/profile/ahestenes.bsky.social/post/3mbuo7alwm22y

In #MathsToday I had all the students at the whiteboards and asked them to solve ax^2+bx+c=0 by completing the square. They were so surprised to get the quadratic formula as their answer, and then they were proud they had derived this mystical formula without even realizing they were doing it.

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— Adrienne Hestenes (@ahestenes.bsky.social) January 7, 2026 at 6:56 PM

I like that @KarenCampe shows multiple solutions using different tech platforms.
Curriculum Tags: Gr7, Gr8
https://karendcampe.wordpress.com/2026/01/08/go-for-geometry-8/

New blog post: "Go For Geometry! 8 Congruence Motions" using translation and reflection tools in dynamic #geometry technology. #MTBoS #iTeachMath #T3Learns #MathsToday karendcampe.wordpress.com/2026/01/08/g...

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— Karen Campe (@karencampe.bsky.social) January 8, 2026 at 7:29 AM

Video Links

Help with rotations
Curriculum Tags: Gr7, Gr8
https://bsky.app/profile/tbrzezinski.bsky.social/post/3mbz25cini22y

Exploring rotations in the coordinate plane: drive.google.com/file/d/1maRA... & youtube.com/shorts/g31aC... @desmos.com #MTBoS #ITeachMath #edusky #mathteacher

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— Tim Brzezinski (@tbrzezinski.bsky.social) January 9, 2026 at 12:40 PM

Help with Translations
Curriculum Tags: Gr7, Gr8
https://x.com/TimBrzezinski/status/2009678807645728815

Exploring translation by vector: https://t.co/OyTaf1s6lS & https://t.co/qAT1OJ459a @geogebra #MTBoS #ITeachMath pic.twitter.com/FRt4z5bCIP

— Tim Brzezinski (@TimBrzezinski) January 9, 2026

Connecting circle equations to Pythagoras Theorem
Curriculum Tags: MPM2D
https://x.com/TimBrzezinski/status/2008542725482967139

Making sense of circle equations. Student & teacher resources to accompany: https://t.co/ihRtv3m5gd & https://t.co/KbSxYihpJQ & https://t.co/0UztDShJQJ @geogebra pic.twitter.com/CI0Cgt42SX

— Tim Brzezinski (@TimBrzezinski) January 6, 2026

Image Links

Quadratics are everywhere (although, I think this might be a catenary)
Curriculum Tags: MPM2D, MFM2P, MCR3U, MBF3C, MCF3M
https://bsky.app/profile/priy45hah.bsky.social/post/3mbrwmvctfc24

Natures strength or a parabola 🤔 #MathsToday ❄️

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— Priya Shah (@priy45hah.bsky.social) January 6, 2026 at 4:49 PM

Math Links for Week Ending Dec 19th, 2025

Featured Links

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

I don't always clear my calculator...

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

— mariana Z (@mariana057) December 17, 2025

Resource Links

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





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

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

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

Video Links

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

Trigonometric patterns explained.pic.twitter.com/eF4JBwh86J

— Interesting STEM (@InterestingSTEM) December 16, 2025

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

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

— Howie Hua (@howie_hua) December 12, 2025

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

Curriculum Tags: Gr7, Gr8, MTH1W

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

Bad math #MTBoS #ITeachMath

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

Image Links

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

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

— Howie Hua (@howie_hua) December 18, 2025

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

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

— Anthony Bonato (@Anthony_Bonato) December 17, 2025

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

Mathematics and mystery.

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

— Cliff Pickover (@pickover) December 12, 2025

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

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

— Cliff Pickover (@pickover) December 15, 2025

Math Links for Week Ending Aug 29, 2025

Featured Links

Some resources for teachers in the GTA but this list is useful for any teacher
Curriculum Tags; All
https://bsky.app/profile/calarmstrong.bsky.social/post/3lxf6z4dxbc2v
https://bsky.app/profile/calarmstrong.bsky.social/post/3lxf5whojwc2v

"Teacher as artisan" @ "Count Me In" from @UofTMath #onted #mtbos HT @OAMElearns #mathed

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— Cal Armstrong (@calarmstrong.bsky.social) August 27, 2025 at 10:02 AM

#onted #mtbos folks Lots of options for outreach from @UofT Math Dept. Check out ways for you and your students to grow! HT @OAMElearns #mathed

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— Cal Armstrong (@calarmstrong.bsky.social) August 27, 2025 at 9:43 AM

Resource Links

Having students actually write about topics in math class can be useful
Curriculum Tags: All
https://www.edutopia.org/article/short-writing-task-elementary-math

Check out 3 focused writing activities that can help students build confidence in their math skills *and* bond with their classmates! 👀 #MathSky #ITeachMath #ElementaryTeacher #EduSky

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— Edutopia (@edutopia.org) August 29, 2025 at 7:37 AM

Video Links

Mathematical dates are always fun
Curriculum Tags: Gr8, MTH1W, MFM2P, MPM2D
https://x.com/howie_hua/status/1960814706639454458

We are a month away from one of the coolest mathematical dates of our lifetime! pic.twitter.com/HEGHBwGomC

— Howie Hua (@howie_hua) August 27, 2025

Image Links

Every math teacher needs this cup
Curriculum Tags: All
https://bsky.app/profile/lindsaykittens.bsky.social/post/3lx3tku6nes2z

I’m making the change from primary teaching to secondary maths. Any recommendations of maths teachers to follow would be welcome. Thank you. #maths #newdirection

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— Lindsay Kittens (@lindsaykittens.bsky.social) August 23, 2025 at 4:44 PM

Math Links for Week Ending Aug 1st, 2025

Featured Links

I have always liked the work that @AndrewStadel does. So it is interesting to hear who he has looked to for guidance
Curriculum Tags: All
https://www.andrewstadel.com/blog/mathgiants

New Blog and YouTube post: 5 Math Giants who have Inspired Me. • there's a 6th (most important) BONUS giant. www.andrewstadel.com/blog/mathgia... I hope they inspire you too and I'd love to hear who has inspired you. #iteachmath #mtbos

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— Andrew Stadel (@astadel.bsky.social) July 29, 2025 at 11:26 AM

Resource Links

I am a fan of BTC but I am not sure that it's a panecea. So I like this honest take on it
Curriculum Tags: All
https://fawnnguyen.substack.com/p/permission-to-go-off-script

New post: Permission to Go Off Script Building Thinking Classrooms practices are powerful—but they’re not all-or-nothing fawnnguyen.substack.com/p/permission...

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— Fawn Nguyen (@fawnnguyen.substack.com) July 5, 2025 at 8:10 PM

Lots of Pythagorean Theorem ideas here
Curriculum Tags: Gr8, MTH1W, MPM2D, MFM2P
https://karendcampe.wordpress.com/2025/07/30/pythagorean-party/ 

New Blog Post: "Pythagorean Party!" technology activities and visuals to celebrate pythagorean theorem & related concepts. #MTBoS #iTeachMath #T3Learns #geometry #MathSky #MathsToday #RecreationalMath karendcampe.wordpress.com/2025/07/30/p...

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— Karen Campe (@karencampe.bsky.social) July 30, 2025 at 9:08 AM

Video Links

I love patterns that can be disected with a little bit of algebra
Curriculum Tags: MTH1W, MFM2P
https://x.com/howie_hua/status/1949553347842974001

Why do we always get 37 with this pattern? pic.twitter.com/AoNVWsSqjp

— Howie Hua (@howie_hua) July 27, 2025

I like the connection to addition and multiplication to help visualize the associative property
Curriculum Tags: All
https://x.com/howie_hua/status/1949141932003021075

I remember learning about the associative property in school and remembered it was so boring, but it can help us with mental math! pic.twitter.com/n8S6Ga0Fjc

— Howie Hua (@howie_hua) July 26, 2025

What a fun unit fraction pattern
Curriculum Tags: MTH1W
https://x.com/howie_hua/status/1950580422213283999

Cool fraction pattern: You can write a unit fraction as a sum of two distinct unit fractions, and we can do this mentally! pic.twitter.com/2F2ubIfeO1

— Howie Hua (@howie_hua) July 30, 2025

Image Links

A good math starter dealing with inequalities
Curriculum Tags: MTH1W
https://bsky.app/profile/percybuttons3.bsky.social/post/3lvahi74ogm2k

Math Links for Week Ending June 20, 2025

Featured Links

I am a big fan of dynamic geometry. Whether it be Geometer's Sketchpad, Geogebra or Desmos. So I always appreciate when someone helps students work with any one of those tools. I also have a series of videos that walk you through some constructions. If you don't know a construction is when you build a geometric item that always keeps its properties (like a square). That is when you drag any of the points, it may change size or orientation but not loose the properties of that geometric figure. You can see those here
Curriculum Tags: Gr7, Gr8, MTH1W
https://fawnnguyen.substack.com/p/first-desmos-geometry-lesson

Resource Links

Quadratic formula Bingo
Curriculum Tags: MPM2D, MFM2P, MCR3U, MBF3C, MCF3M
https://mathequalslove.net/quadratic-formula-bingo-game/

NEW Quadratic Formula Bingo Game Activity (features rational, irrational, and imaginary solutions) https://t.co/3GSPMq93bv#mtbos #iteachmath pic.twitter.com/Vzw3aqjoxL

— Sarah Carter (@mathequalslove) June 19, 2025

Is everything we've been saying about the fairness of coins been (partially) wrong? Find out here:
Curriculum Tags: All

https://www.scientificamerican.com/article/scientists-destroy-illusion-that-coin-toss-flips-are-50-50/

Real coin flips are ~49-51 not 50-50 www.scientificamerican.com/article/scie... But you can guarantee equal probability with a simple trick! Flip 2x in a row starting with the same side up. HT->call it H TH->call it T HH,TT->try again (due to von Neumann en.wikipedia.org/wiki/Randomn...) #🧮 🧪 1/4

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— Joshua Grochow (@joshuagrochow.bsky.social) June 20, 2025 at 3:58 PM

Video Links

I never liked the idea of memorizing math facts. I have always thought it was better to internalize them and if you are looking for a good way to do that, try this out
Curriculum Tags: All
https://x.com/howie_hua/status/1934960810138259951

Be stronger with math facts by practicing this: pic.twitter.com/bBL0Tm7T7Y

— Howie Hua (@howie_hua) June 17, 2025

Geometry can definitely be beautiful 
Curriculum Tags: All
https://x.com/pickover/status/1935440630265602257

Mathematics.

Every minute, draw a line from the end of the minute hand, to the end of the hour hand. A wonderful pattern emerges.

By Matt Henderson, @matthen2, used with permission. [math, maths] pic.twitter.com/vj9RdMtLNS

— Cliff Pickover (@pickover) June 18, 2025

Image Links

This week's prompt for #MathPhoto25
Curriculum Tags: All
https://bsky.app/profile/theericklee.bsky.social/post/3lrxp2r4kbk2z

Week 3 of #MathPhoto25 has arrived. Where do you see lines meeting to form corners and #angles? #ITeachMath #MathsToday

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— Erick Lee (@theericklee.bsky.social) June 19, 2025 at 10:06 AM

More power to ya
Curriculum Tags: Gr8, MTH1W
https://bsky.app/profile/curiouspolymath.bsky.social/post/3ls22gniblk2w

#mathsky

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— Pete Wung The Curious Polymath (@curiouspolymath.bsky.social) June 20, 2025 at 8:35 AM

Math Links for Week Ending Apr 18, 2025

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It was always one of my favourite things to find something out in the wild that would connect to the curriculum I'm teaching and make students say "hmm". Make sure you check out the comments for the answer
Curriculum Tags: MPM2D, MFM2P
https://x.com/aledaklassen/status/1911424118336999774

Is there a place for this in #mth1w?https://t.co/YKQf409CAL

And... Is this true?! I don't drink coffee. #onted

— Aleda Klassen (@aledaklassen) April 13, 2025

Resource Links

I think it's important to find things that are thing that kids might be thinking of and making money on the Internet is definitely one of them.
Curriculum Tags: Gr7, Gr8, MTH1W
https://robertkaplinsky.com/work/how-much-money-do-you-earn-for-1000000-streams-on-spotify/

Looking for a real world context for multiplying and dividing decimals? Check out my problem-based lesson called How Much Money Do You Earn For 1,000,000 Streams On Spotify?
https://t.co/BULChRpJe8 pic.twitter.com/DvZqlCImV5

— Robert Kaplinsky (@robertkaplinsky) April 11, 2025

Video Links

I love a good sum of series but I also like the explanation of the conditions when this sum doesn't have an answer
Curriculum Tags: MCR3U
https://x.com/howie_hua/status/1913005710172164429

This pattern with infinite series is not a coincidence.

Also, 1+2+4+8+...=-1???

(I don't have a good title for this one but I think it's good lol) pic.twitter.com/ByLff6nErK

— Howie Hua (@howie_hua) April 17, 2025

The beauty of mathematics 
Curriculum Tags: All
https://x.com/mathladyhazel/status/1911616202448785610

Each line produces two new lines at an angle. When two collide they don't produce new ones. The result was a pleasant surprise. [https://t.co/PuUxRQRECR] pic.twitter.com/GTvb8mwpum

— Math Lady Hazel 🇦🇷 (@mathladyhazel) April 14, 2025

Image Links

I like this kind of question because it seems harder than it is but with a little care, it should be do able. Can you guess why this was published on the 18th?
Curriculum Tags: Gr8, MTH1W
https://bsky.app/profile/percybuttons3.bsky.social/post/3ln2wzqrjkq2f

Math Links for Week Ending Mar. 21st, 2025

Featured Links

The season finale of Severance went live tonight. If you are a fan then you will like this @Desmos creation
Curriculum Tags: All
https://x.com/Desmos/status/1902737247717187868

Your outie makes art...in Desmos.#severance #lumon pic.twitter.com/qYeCbbp25w

— Desmos (@Desmos) March 20, 2025

Resource Links

It's always good to see some good demos of how to use dynamic geometry software. In this case you have some choice. 
Curriculum Tags: MTH1W
https://karendcampe.wordpress.com/2025/03/16/go-for-geometry-5/

New blog post! "Marvelous Midsegments" Go For Geometry! Episode 5.
Activities exploring on all technology platforms: Desmos, GeoGebra & TI calculators.
Taking the scenic route 😉#geometry #MTBoS #iTeachMath #T3Learnshttps://t.co/O2hFX9YiAl

— Karen Campe (@KarenCampe) March 17, 2025

Some new ways to show points with @Desmos
Curriculum Tags: All
https://x.com/Desmos/status/1902088563707277475

So...what's your point?

Customize your points and text labels with new shapes and outline settings. Check out an example graph here: https://t.co/zaJpjSsBOx#mtbos #iteachmath #desmostips pic.twitter.com/3X05h5oii7

— Desmos (@Desmos) March 18, 2025

Video Links

I also remember when I first made this connection. 
Curriculum Tags: MPM2D, MFM2P, MCR3U, MCF3M, MBF3C
https://x.com/howie_hua/status/1902521844273705127

In high school, I didn't realize completing the square LITERALLY means to complete the square. Here's what I mean: pic.twitter.com/Sq4lT5KIoN

— Howie Hua (@howie_hua) March 20, 2025

Making Logarithmic properties make sense.
Curriculum Tags: MHF4U

https://x.com/howie_hua/status/1902890459774783796

In high school, I just memorized these logarithm rules for products and quotients. If you're curious why they work, here's why: pic.twitter.com/VyrZXT91n8

— Howie Hua (@howie_hua) March 21, 2025

I have seen this in so many forms but I don't think I've seen this version
Curriculum Tags: MCR3U, MHF4U
https://x.com/mathladyhazel/status/1902562029245726971

When a math person dances. pic.twitter.com/U1uF6Svhf0

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

Image Links

This might be a good example of an outlier
Curriculum Tags: MDM4U
https://bsky.app/profile/infobeautiful.bsky.social/post/3lkoul42ba424

Woah Australia - Global cancer rates in people under 50 Source: World Health Org

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— Information is Beautiful (@infobeautiful.bsky.social) March 18, 2025 at 7:55 PM

Math Links for Week Ending Dec 27, 2024

Featured Links

Given that next year, 2025, is the first perfect square year in a while, I think you may want to focus on the calculation 452 this coming year in as many ways as you can think of. 
Curriculum Tags: All
https://bsky.app/profile/geometiles.bsky.social/post/3lea5s4pxi22x

We’re about to embark on a SQUARE YEAR! #mathsky #iteachmath

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— Geometiles (@geometiles.bsky.social) December 26, 2024 at 1:58 PM

Resource Links

A less tedious way to look at factor trees
Curriculum Tags: Gr7, Gr8
https://mathequalslove.net/2025-factor-tree-puzzle/

Let's continue the countdown to 2025. Today's 2025 Factor Tree Puzzle was inspired by Dr. Harold Reiter who presented on factor tree puzzles at a math teachers' circle workshop I attended. mathequalslove.net/2025-factor-... #mtbos #iteachmath #puzzlingclassroom #mathsky #edusky

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— Sarah Carter (@mathequalslove.bsky.social) December 27, 2024 at 10:14 AM

Video Links

Hidden sinusoidal functions in nature
Curriculum Tags: MCR3U, MCF3M
https://www.reddit.com/r/oddlysatisfying/comments/28yiqk/the_sequence_of_the_sun/?rdt=53283

f(x) = sun(x). The sequence of the sun. [https://t.co/uuBMUJt5y6] pic.twitter.com/z046Gai04r

— Math Lady Hazel 🇦🇷 (@mathladyhazel) December 24, 2024

I like this because it focusses on why, not on memorizing some sort of formula
Curriculum Tags: MPM2D
https://bsky.app/profile/tbrzezinski.bsky.social/post/3ldovqhadts2i

Distance between 2 points in the coordinate plane: Active exploration for a thinking classroom. To access the exploration, see the link in the description of the featured video here: youtube.com/shorts/pfucM.... #MTBoS #ITeachMath #math #mathhelp #edusky

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— Tim Brzezinski (@tbrzezinski.bsky.social) December 19, 2024 at 5:19 PM

Image Links

I don't like this sort of thing as a memory aid, however, I think it would be great for kids to come up with it on their own or prove that it's true
Curriculum Tags:
MPM2D, MFM2P, MCR3U, MCF3M, MBF3C
https://x.com/GeometryPuzzles/status/1872106172423274843

Easy to remember trigonometric ratios pic.twitter.com/hCahSOFlLb

— Math Lover (@GeometryPuzzles) December 26, 2024

A few more "Elf on the Shelf" parodies from @Howie_Hua
Curriculum Tags: All
https://x.com/howie_hua/status/1871646638818939170
https://bsky.app/profile/howiehua.bsky.social/post/3le5q2kbr522q

You've heard of elf on the shelf, now get ready for pic.twitter.com/fMfem9qgBO

— Howie Hua (@howie_hua) December 24, 2024

Sorry, one more haha You've heard of elf on the shelf but have you heard of #math #ITeachMath #EduSky

[image or embed]

— Howie Hua (@howiehua.bsky.social) December 25, 2024 at 2:47 PM

Something for your Calculus class
Curriclum Tags: MCV4U
https://x.com/memecrashes/status/1871359192575160440

pic.twitter.com/8xNBT95iW2

— A meme page to check every time MatLab crashes (@memecrashes) December 24, 2024

That classic order of operations internet meme as a Christmas meme
Curriculum Tags: MTH1W
https://x.com/pickover/status/1871762165021151691

This is a math meme by @howie_hua, Used with permission.

He writes: "Be on Santa's nice list by simply conveying what you mean mathematically clearly so we can stop having these PEMDAS arguments." pic.twitter.com/IjWZDQCYr5

— Cliff Pickover (@pickover) December 25, 2024

Something to use as a starter when dealing with Order of Operations
Curriculum Tags: All
https://bsky.app/profile/bot.cowtools.org/post/3le2fzrs6sh2v

“Yes, yes, I know that, Sidney—everybody knows that! … But look: Four wrongs squared, minus two wrongs to the fourth power, divided by this formula, do make a right.”

[image or embed]

— THE FAR SIDE DAILY (@bot.cowtools.org) December 24, 2024 at 7:10 AM

Math Links for Week Ending Nov 15, 2024

Featured Links

I have featured this problem before but I like when teachers talk about problems that give them experiences like this. 
Curriculum Tags: All
https://www.aliciaburdess.com/post/the-most-beautiful-experience

New blog post if anyone wants to read about my most favourite math problem with forever thanks to @Jason_To and @msbjacobs https://t.co/t9UoDq2HAg #mtBos #iteachmath

— Alicia Burdess (@BurdessAlicia) November 15, 2024

Resource Links

You could connect this pattern block puzzle interactive from @DPScher to proportional reasoning and fractions 
Curriculum Tags: Gr7, Gr8
https://www.sineofthetimes.org/pattern-block-puzzles/

Video Links

I think this is a really neat problem for dealing with rates. Especially because it can be solved with many methods. 
Curriculum Tags: Gr8, MTH1W
https://x.com/howie_hua/status/1856011483412570328

For today's Mental Math Monday, how would you mentally calculate which is faster?

20 miles in 30 minutes or 25 miles in 35 minutes pic.twitter.com/Cn0ZaFDVjc

— Howie Hua (@howie_hua) November 11, 2024

I appreciate how he talks about those simple properties 
Curriculum Tags: All
https://x.com/howie_hua/status/1855330539475009856

Explaining the Zero Product Property pic.twitter.com/zYGBMziM7E

— Howie Hua (@howie_hua) November 9, 2024

I think this might be useful when talking about number systems in MTH1W
Curriculum Tags: MTH1W
https://youtu.be/OEGGz1sCS5w?si=c6ikYumDgSQ3By8d

Image Links

I'm not necessarily a fan of Taylor Swift but I recognize her talent. So this series of images might go well in your math classes
Curriculum Tags: MCR3U, MHF4U
https://x.com/Anthony_Bonato/status/1857074773332766779

Taylor Swift is giving six sold-out concerts in my hometown of Toronto starting tonight. In her honor, here is a thread of her as functions

y = x pic.twitter.com/aAlbtP39Fw

— Anthony Bonato (@Anthony_Bonato) November 14, 2024

Which relates to you?
Curriculum Tags: MCR3U, MHF4U
https://x.com/pickover/status/1856138125745008994

Mathematics Love Stories.

By theroundpanda, Source: https://t.co/ZH4eI0IGC0 pic.twitter.com/MnNThVRkyY

— Cliff Pickover (@pickover) November 12, 2024

You can solve this with systems of equations or logic
Curriculum Tags: MPM2D, MFM2P
https://x.com/Rainmaker1973/status/1855246463351009458

Can you find the height of the glass? pic.twitter.com/oHKUQc9jcs

— Massimo (@Rainmaker1973) November 9, 2024

Math Links for Week Ending Oct 18th, 2024

Featured Links

I always used to start my lesson on squaring binomials with this but extended it to the form (n + a)² = n² + 2na + a² and would start by asking kids for whole numbers close to 50 and I would square them in my head before looking at the algebra that showed why it worked.
Curriculum Tags: MPM2D, MFM2P, MCR3U, MCF3M, MBF3C
https://x.com/howie_hua/status/1845116066386804979

If you know one perfect square, here's how you can mentally calculate the next perfect square: pic.twitter.com/ugD9qCOfb2

— Howie Hua (@howie_hua) October 12, 2024

Resource Links

I appreciate that @JennaLaib continues to add to her collection of slow reveal graphs and I also like the reminder that we shouldn't steer away from controversial topics. Check out some of the new graphs including the one on the correlation between gun deaths and gun laws. 
Curriculum Tags: MDM4U, MAP4C
https://slowrevealgraphs.com/

Video Links

I'm a big fan of quick dynamic student explorations, especially in geometry
Curriculum Tags: Gr7, Gr8, MTH1W
https://x.com/TimBrzezinski/status/1846846388207865990

Transversal cuts parallel lines — Quick student exploration: https://t.co/nPtWIxvdY6 @geogebra #MTBoS #ITeachMath pic.twitter.com/G5zBXcnY0I

— Tim Brzezinski (@TimBrzezinski) October 17, 2024

Image Links

If you are playing with prime numbers then this is neat. 561 is a not a prime number but by over 100 different prime tests it comes up as prime. 
Curriculum Tags: MTH1W
https://findthefactors.com/2015/07/23/561-quick-prime-number-tests/

Mathematics.

"561" is an interesting number. It gives a "false positive" to these 102 prime-number tests: https://t.co/35N3bE1DSL pic.twitter.com/FMet8xJYT6

— Cliff Pickover (@pickover) October 17, 2024

    

Math Links for Week Ending Mar 15, 2024

Featured Links

I love thinking about other ways to grade student work. There are some great ideas here if you are looking for some change
Curriculum Tags: All
https://gradingforgrowth.com/p/20-small-starts-for-alternative-grading

Today at Grading For Growth, I give 20 ways to get started with alternative grading on a small scale. Some of these are simple shifts in approach, while some are more concrete. But they are all good for students!#alternativegrading #highereducationhttps://t.co/tCsnkwm4oQ

— Robert Talbert (@RobertTalbert) March 11, 2024

Resource Links

I feel like you could do a lot of fun things in just about any class with this resource. 
Curriculum Tags: All
https://www.eatmy.art/

Playing with https://t.co/hH68olMjFJ today in class. Super easy to make animated gif images. #ITeachMath pic.twitter.com/VLumeSpQfv

— Erick Lee HRCE Math (@TheErickLee) March 8, 2024

Some more Pi Day resources
Curriculum Tags: All

https://mathsedideas.blogspot.com/2018/02/on-pi-day.html

A collection of activities for #PiDay… π history. π formulae. π birthdays. π primes. π puns and jokes. π art. Fake proofs for π. Memorising π. Continued fractions for π. Pilish. The music of π. Plus links to film, audio, websites, and articles. And more… https://t.co/SysSa3AO6R

— Maths Ed (@MathsEdIdeas) March 11, 2024

https://static1.squarespace.com/static/5436e695e4b07f1e91b30155/t/5504cbf1e4b00ffe1406e552/1426377713470/why-pi-matters.pdf

Why Pi Matters (from @NewYorker in 2015)https://t.co/n4GRBlUfUx

PDF for non-subscribers: https://t.co/c05o0asfX1

— Steven Strogatz (@stevenstrogatz) March 14, 2024

https://www.desmos.com/geometry/nm34xeu8xk

Not like we need an excuse to open up the Desmos Geometry tool, but this Archimedes-inspired strategy for approximating pi is a pretty good one. Happy Pi Day!#piday #PiDay2024 #geometry #mathproof #mathteacher pic.twitter.com/QUVhCsq5wZ

— Desmos (@Desmos) March 14, 2024

A nice visual showing sinusoidal relations
Curriculum Tags: MCR3U, MCF3M

https://twitter.com/historyinmemes/status/1767287126629245082

How to explain the math in a simple way pic.twitter.com/Ch6LVtLzpG

— Historic Vids (@historyinmemes) March 11, 2024

I have my own list of Math based podcasts (here) but this is another one and I love the way that it is organized by topic. 
Curriculum Tags: All

https://mathsedideas.blogspot.com/p/mathematics-audio-documentaries.html

An updated catalogue of links to ≈ 400 mathsy radio and podcast programmes — to dip into, relax to, share, and enjoy. Including from @stevenstrogatz @FryRsquared @alexbellos @SLSingh @tomrocksmaths @d_spiegel and many more: https://t.co/ANOXtRBZ2i

— Maths Ed (@MathsEdIdeas) March 14, 2024

Video Links

Here's a fun little proof that you could do when talking about prime numbers
Curriculum Tags: MTH1W
https://twitter.com/howie_hua/status/1766452571760402904

Did you know all prime numbers are one away from a multiple of 6 (besides 2 and 3)? Here's how we know: pic.twitter.com/D88M5qPhKp

— Howie Hua (@howie_hua) March 9, 2024

A nice representation with the Olympics coming up
Curriculum Tags: Gr7, Gr8, MDM4U
https://twitter.com/jennalaib/status/1766634206694670345

Love this one! I'm wrapping around my head around the fact that it was 2:1 male to female when I was a kid! 🤯

Here's to it being 1:1, and maybe even 1:1:x in the future, to be more inclusive... https://t.co/QJUv1vCLYL

— Jenna Laib (@jennalaib) March 10, 2024

Here is a nice visual proof of the sum of squares 
Curriculum Tags: MCR3U
https://en.etudes.ru/models/sum-of-squares/

The Sum of Squares, with a geometric proof 🧱🧱🧱https://t.co/QLGWAHfjNw (by Mathematical Etudes)#math #science #iteachmath #mtbos #visualization #elearning #geometry pic.twitter.com/AKcIuWvzHi

— Tungsteno (@74WTungsteno) November 8, 2021

Image Links

I like this because you could solve it rather elegantly with algebraic manipulation or use a more brute force method by just evaluating the powers.
Curriculum Tags: MTH1W
https://twitter.com/mehrdadbas72335/status/1767120608284799103

Easy question for you...🔥🔥🔥.
Question:
Try to find the value of x?#mathe.#Maths.#Algebra.#Geometry.#Calculus.#ProblemSolving.#test.#Exams.#puzzle.#Science.#evaluation.#solve.#ریاضی.#ریاضیات. pic.twitter.com/cjFf9yldMt

— Mehrdad Basiry (@mehrdadbas72335) March 11, 2024

Perhaps writing this in a simpler form will help?

Curriculum Tags: MTH1W
https://twitter.com/mehrdadbas72335/status/1767473786075656683

Easy question for you...🔥🔥🔥.
Question:
Try to find the value of following expression?#mathe.#Maths.#Algebra.#Geometry.#Calculus.#ProblemSolving.#test.#Exams.#puzzle.#Science.#evaluation.#solve.#ریاضی.#ریاضیات. pic.twitter.com/eszuMYrRzb

— Mehrdad Basiry (@mehrdadbas72335) March 12, 2024

Throwing shade on the standard algorithm

Curriculum Tags: All
https://twitter.com/Mathgarden/status/1767164834540343342

pic.twitter.com/AbErJVB5u9

— Sunil Singh (@Mathgarden) March 11, 2024

Here is a great problem to use when applying circle theorems
Curriculum Tags: MTH1W
https://twitter.com/sonukg4india/status/1767406915251044827

#Puzzled pic.twitter.com/9JU1PWCTxW

— SKG (@sonukg4india) March 12, 2024

I make this joke all the time
Curriculum Tags: MPM2D, MFM2P, MCR3U, MCF3M, MBF3C, MAP4C

https://twitter.com/thescottbarber/status/1767740512017293512

Jesus teaching only in parabolas pic.twitter.com/b8Yty5VTVx

— Scott Barber (@thescottbarber) March 13, 2024