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 May 30th, 2025

Featured Links

I love this train of thought set of posts to solve this area problem with a surprising result. Take the time to go through @DavidKButler's solution, at least to see the surprising result but also to get a great example of the art of problem solving. 
Curriculum Tags: All
https://bsky.app/profile/davidkbutler.bsky.social/post/3lqdbrayyx22v

Ok let me #TryMathsLive with this from @mathforge.org …

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— David K Butler (@davidkbutler.bsky.social) May 29, 2025 at 1:50 PM

Resource Links

A great set of @Geogebra dynamic resources on angle properties from @Libro
Curriculum Tags: Gr7, G8, MTH1W
https://www.geogebra.org/m/ujsgmc8w

Video Links

As always I appreciate that he says why this works
Curriculum Tags: MTH1W, MPM2D
https://x.com/howie_hua/status/1926324656832725401

If you know one square number, you can mentally calculate the next square number! Here's how: pic.twitter.com/xyTDQNyeIG

— Howie Hua (@howie_hua) May 24, 2025

An interesting take on negative exponents

Curriculum Tags: MTH1W, MPM2D

https://x.com/howie_hua/status/1927856254405247111

Exponents are seen as repeated multiplication, but what represents repeated division? pic.twitter.com/p73voglRfL

— Howie Hua (@howie_hua) May 28, 2025

I would definitely use this problem when dealing with equations and applications of equations to have kids calculate things like the speed when hitting the water, the speed or the height, which should all be attainable from the time of the fall.
Curriculum Tags: MPM2D, MCR3U, MCF3M, MBF3C
https://x.com/davidpetro314/status/1927069513075277858

There is a #math and/or #physics problem in here. #MTBoS #iTeachMath #MathChat #iTeachPhysics https://t.co/rT5ejQgILd

— David Petro (@davidpetro314) May 26, 2025

Image Links

What math problem would you ask about this situation. Thanks to @DonFraser9 for this one
Curriculum Tags: All
https://x.com/stats_feed/status/1928170132179738754

Les Stewart typed out every number from one to one millions on his typewriter, not in number form, but spelled out. It took him 16 years. pic.twitter.com/hnwskwkZ9U

— World of Statistics (@stats_feed) May 29, 2025

Math Links for Week Ending Mar 28th, 2025

Featured Links

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

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

— Howie Hua (@howie_hua) March 27, 2025

Resource Links

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

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

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

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

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

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

— Jo Morgan (@mathsjem) March 23, 2025

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

https://slowrevealgraphs.com/

New #SlowRevealGraph Additions!

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

— Jenna Laib (@jennalaib) March 24, 2025

Video Links

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

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

Graphing quadratics in vertex form #mathsky

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

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

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

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

— Howie Hua (@howie_hua) March 28, 2025

Image Links

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

Curriculum Tags: All

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

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

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

A perfect math starter
Curriculum Tags: All

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

#RecreationalMath #iTeachMath #MathSky

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

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

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

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

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

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

— Jonathan Hall (@StudyMaths) March 28, 2025

Math Links for Week Ending 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 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 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

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

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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

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— 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.”

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

Math Links for Week Ending Dec 20th, 2024

Featured Links

If you didn't use this this year, save it for next
Curriculum Tags: All
https://mathsedideas.blogspot.com/p/resources.html#xMathsCard

Teachers: Wish your students and their families a mathemagical xMaths with an xMaths card full of problems and curios. Two cards in various formats free to download and customise • https://t.co/PnuNqACc11 pic.twitter.com/AL67WZSufo

— Maths Ed (@MathsEdIdeas) December 18, 2024

Resource Links

This is great for physics class but also for some advanced math classes. Thanks @a_freeparticle
Curriculum Tags: MCR3U, MHF4U
https://afreeparticle.com/cart.html

I think it is the aperiodic shape that was my favourite
Curriculum Tags: All
https://www.scientificamerican.com/article/the-7-coolest-mathematical-discoveries-of-2024/

It's been an amazing year for math! Researchers discovered a new prime number this year, a novel formula for pi, mathematical messages in music, and more: www.scientificamerican.com/article/the-...

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— Clara Moskowitz (@clarakm.bsky.social) December 16, 2024 at 4:27 PM

Video Links

How would you solve this question
Curriculum Tags: MCR3U, MHF4U
https://bsky.app/profile/howiehua.bsky.social/post/3ldk2opttts2n

How many gifts were given in the song 12 Days of Christmas? #math #ITeachMath #EduSky youtube.com/shorts/bmpCC...

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— Howie Hua (@howiehua.bsky.social) December 17, 2024 at 7:04 PM

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I've noted what I thought was the best version in the comments
Curriculum Tags: All
https://x.com/howie_hua/status/1869911106283811140

This might be a harder one 😬

You've heard of elf on the shelf but have you heard of pic.twitter.com/o8PXXR6f5N

— Howie Hua (@howie_hua) December 20, 2024

For doing statistics
Curriculum Tags: All
https://bsky.app/profile/howiehua.bsky.social/post/3ldhlos4svk2r

You've heard of elf on the shelf but have you heard of #math #ITeachMath #EduSky

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— Howie Hua (@howiehua.bsky.social) December 16, 2024 at 7:31 PM

I think there are a couple that work here

Curriculum Tags: MCR3U, MCF3M, MHF4U

https://x.com/howie_hua/status/1869513167925391773

You've heard of elf on the shelf but have you heard of pic.twitter.com/vkc0icGDKM

— Howie Hua (@howie_hua) December 18, 2024

Some algebra for your geometry
Curriculum Tags: MTH1W

https://x.com/GeometryPuzzles/status/1869570853605953713

How to solve this #angle #geometry pic.twitter.com/coKdrKjUy4

— Math Lover (@GeometryPuzzles) December 19, 2024

Seems True
Curriculum Tags: MDM4U

https://bsky.app/profile/spalm.bsky.social/post/3ldq6ay4dbc2h

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— Stuart Palmer (@spalm.bsky.social) December 20, 2024 at 5:24 AM

Some Christmas graphs
Curriculum Tags: All

https://x.com/MrValencia24/status/1866430289528123562

What’s your favorite #ChristmasTree? 🤔🎄 #MathPlay🧮#CodeBreaker🦾 #ITeachMath #MTBoS #MathArt #MathIsFun #Math #Maths #EdChat #STEM #Christmas pic.twitter.com/pdMJvd3zS6

— Libo Valencia 🧮 MathPlay (@MrValencia24) December 10, 2024

Math Links for Week Ending Nov 1st.

Featured Links

I'm a big fan of productive struggle. Check out the comments on this post for some ideas
Curriculum Tags: All
https://x.com/TheMathGuru/status/1847412856133669057

In order for students to feel safe enough to engage in Productive Struggle, they need to feel like productive math students. Here is a thread of resources that I find helpful, inspiring & hopeful❤️‍🩹👇 #CorwinTalks

— vanessa vakharia (@TheMathGuru) October 18, 2024

Resource Links

A self checking worksheet, nice
Curriculum Tags:MCR3U, MCF3M, MBF3C
https://mathequalslove.net/big-10-solving-quadratic-equations-worksheet/

New Resource: Solving Quadratic Equations by Factoring Big 10 Activity https://t.co/fjEPSRl8oe pic.twitter.com/lLAWYjLp6O

— Sarah Carter (@mathequalslove) October 24, 2024

Get your classic NCTM calendar problems here:

Curriculum Tags: All
https://karendcampe.wordpress.com/2024/11/01/november-calendar-problems-2/

Happy November and the new Calendar of Problems is here!
Enjoy #ProblemSolving with your students or for yourself. #MTBoS #iTeachMath #T3Learns #Math #MathChat #algebra #geometryhttps://t.co/6kiw5EObVb

— Karen Campe (@KarenCampe) November 1, 2024

Video Links

You can never have enough resources to help with logistics with building thinking classrooms
Curriculum Tags: All
https://x.com/MikeFlynn55/status/1849866560330137949

Are you looking to cut down on transition times in your thinking classroom? Here’s a few ideas to help you. #buildingthinkingclassrooms pic.twitter.com/26CWQlnzrH

— Mike Flynn (@MikeFlynn55) October 25, 2024

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The Beauty is real
Curriculum Tags: All
https://x.com/pickover/status/1852366011061694560

Mathematics.

“Islamic Fibonacci Spiral.”

Source: Anita Chowdry, https://t.co/4j0uq89jX5 pic.twitter.com/dOCHgIzDO5

— Cliff Pickover (@pickover) November 1, 2024

Math Links for Week Ending Oct 26th, 2024

Featured Links

The @OAMEcounts Leadership conference is virtual this year. Check it out 
Curriculum Tags: All
https://oame.on.ca/mcis/index.php?ph=activate

I am excited to announce this year's OAME Leadership virtual event. Dr Rachel Lambert (@mathematize4all) will be sharing her session "Designing Equitable Mathematics from the Margins: UDL Math" with educators across Ontario. Register at: https://t.co/9aaYOPtO8M
Pls retweet pic.twitter.com/nQ500m5vGd

— Mark Chubb (@MarkChubb3) October 20, 2024

Resource Links

This is a neat strategy. Maybe give it a try
Curriculum Tags: All
https://docs.google.com/presentation/d/1Oq99RxhocBiV68C2cKjt85BfFGaXqJVU3E_U9CHuA8o/edit#slide=id.g1c75540970e_0_0

My favorite slide from one of my favorite talks at @NCTM. One of the biggest challenges facing math teachers (whether they know it or not!) is turning wrong answers into learning. Behold! The Super Wrong, Kinda Right continuum. /by @ottensam https://t.co/r6VuU0AY5t pic.twitter.com/BNTOu6JVEV

— Dan Meyer (@ddmeyer) October 17, 2024

Dealing with distance time graphs? Then this resource might be for you (and your students)
Curriculum Tags: MTH1W
https://x.com/DrFrostResource/status/1846914071569822009

In our new resources on Distance-Time and Speed-Time Graphs, we have included many visualisations to help students to grasp the different features of these graphs.

You can find them linked below @DrFrostMaths:

Distance: https://t.co/hTBPpuRx1U
Speed:https://t.co/pSEz6utFPz pic.twitter.com/UtNp0io065

— Dr Frost Resource Team (@DrFrostResource) October 17, 2024

Some fun with complex numbers
Curriculum Tags: All
https://x.com/LukeSelfwalker/status/1847677762049310818

Julia Sets in Desmos. Choose your own complex number for c and see what pattern you can create.https://t.co/dPKn0msMDz pic.twitter.com/X5Ia1lo8wx

— Luke Walsh (@LukeSelfwalker) October 19, 2024

Earlier this year the wodb.ca site went down but now all of the resources have been hosted by @TriangleManCSD on his Talking Math with Kids site
Curriculum Tags: All
https://talkingmathwithkids.com/wodb/

New home for #wodb is live!https://t.co/NddEDQ8wrK

Still lots of tweaks forthcoming, but most of your faves are there and easy to find.#mtbos #iteachmath

— Christopher Danielson (@Trianglemancsd) October 14, 2024

It seems simple but I think a nice way to have kids get into solving equations is to do a set of problems like this.
Curriculum Tags: MTH1W
https://www.tes.com/resource-detail/area-51-reverse-area-of-quadrilaterals-13134865

I made this towards the end of our topic on quadrilaterals (and they had previously done circles). Pupils always need more practice of working backwards, and this worked well: the difficulty ramps up nicely. Worksheet with answers is at https://t.co/olfodqTsYL pic.twitter.com/TlYjGnTSgL

— Paul Smith (@drpas1001) October 17, 2024

Video Links

I'm all for resources that take things that may seem abstract at first and make them concrete
Curriculum Tags: MPM2D, MCF3M, MBF3C
https://x.com/howie_hua/status/1848882653656977751

In high school, I didn't realize completing the square literally means to complete the square. Here's what I mean: pic.twitter.com/lSAt0uwV5q

— Howie Hua (@howie_hua) October 23, 2024

Image Links

I always like these fraction activities. 
Curriculum Tags: Gr7, Gr8
https://x.com/MathsCirclesOz/status/1847368820991938653

A neat puzzle-

1. Shade any 2 sections
2. What fraction of the square is shaded?
3. What other fractions are possible? Impossible?

This puzzle kicked off discussions at a workshop for PD Hub members. pic.twitter.com/u7i18u4cTa

— Michaela Epstein (@MathsCirclesOz) October 18, 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