Math Links for Week Ending Apr. 11th, 2025

Featured Links

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

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

— James Tanton (@jamestanton) April 5, 2025

Resource Links

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

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

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

Video Links

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

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

— Howie Hua (@howie_hua) April 9, 2025

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

Beautiful visualization 👍 pic.twitter.com/gyi1L0B4TP

— Matematickcom (@Matematickcom) April 10, 2025

Image Links

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

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

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

Math Links for Week Ending Apr 4th, 2025

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

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

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

Resource Links

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

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

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

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

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

— Daniel Mentrard (@dment37) April 1, 2025

Video Links

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

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

— Howie Hua (@howie_hua) April 1, 2025

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

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

— Howie Hua (@howie_hua) April 5, 2025

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

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

— Marilyn Burns (@mburnsmath) April 4, 2025

Image Links

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

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

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

Math Links for Week Ending Feb 21, 2024

Featured Links

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

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

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

Resource Links

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

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

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

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

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

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

Video Links

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

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

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

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

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

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

Image Links

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

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

— Calculus Insights (@CalcInsights_) February 17, 2025

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

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

— Howie Hua (@howie_hua) February 18, 2025

Math Links for Week Ending Jan 31, 2025

Featured Links

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

Check it out!

A virtual Making Math Stick Book Study with @oame_qslma.

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

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

Resource Links

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

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

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

— Jo Morgan (@mathsjem) January 25, 2025

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

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

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

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

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

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

— Robert Kaplinsky (@robertkaplinsky) January 27, 2025

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

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

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

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

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

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

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

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

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

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

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

Video Links

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

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

— Howie Hua (@howie_hua) January 25, 2025

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

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

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

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

When the slide is continuous but not differentiable #MathSky

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

Image Links

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

Love this Maths provocation #iTeachMath

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

Math Links for Week Ending Jan 24th, 2025

Featured Links

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

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

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

Resource Links

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

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

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

Video Links

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

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

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

— Greg Egan (@gregeganSF) January 17, 2025

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

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

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

Perfect for the binomial theorem
Curriculum Tags: MDM4U

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

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

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

Image Links

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

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

— Math Lover (@GeometryPuzzles) January 19, 2025

Math Links for week Ending Jan 3, 2024

Featured Links

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

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

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

Resource Links

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

— Maths Ed (@MathsEdIdeas) January 1, 2025

Video/Audio Links

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

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

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

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

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

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

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

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

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

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

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

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

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

— Cliff Pickover (@pickover) January 1, 2025

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

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

— Luke Walsh (@LukeSelfwalker) January 1, 2025

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

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



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

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

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

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

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

— Sam Tripoli (@samtripoli) December 31, 2024

Image Links

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

Origami Black Hole xkcd.com/3033

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

A challenge for proving triangles are congruent
Curriculum Tags: Gr8

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

Tri-ing....

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

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

Storage Tanks xkcd.com/2974

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

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

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

— Eric Elter (@ElterEric) January 1, 2025

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

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

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

— Fawn Nguyen (@fawnpnguyen) December 31, 2024

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

Try to solve this pic.twitter.com/fZHnoerUT9

— Math Lover (@GeometryPuzzles) December 30, 2024

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

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

— Simon Kuestenmacher (@simongerman600) December 30, 2024

I call this the bathingsuit problem :-)

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

#math pic.twitter.com/2uVWQIdrha

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

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

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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 Oct 4th, 2024

Featured Links

It was crazy what happen to @JennaLaib but I'm glad so many of our math community came together to show her support
Curriculum Tags: All
https://jennalaib.com/2024/09/29/for-our-math-education-community/

NEW BLOG POST

"For Our Math Education Community"

I want to share how I launched my sessions at NCSM and NCTM last week: with a message about community.https://t.co/oDiAysb5Fb

— Jenna Laib (@jennalaib) September 29, 2024

Resource Links

Ways that you can use post it notes to further understanding in math class
Curriculum Tags: All
https://karendcampe.wordpress.com/2024/09/18/post-it-notes-other-pedagogical-advice/

New blog post! Post-It Notes & Other Pedagogical Advice... some tips for new and not-so-new teachers.#MTBoS #iTeachMath #T3Learns #MathsEd #MathEd #Teaching https://t.co/3cZhc1TGGZ

— Karen Campe (@KarenCampe) September 19, 2024

The October (classic) NCTM calendar problems 
Curriculum Tags: All
https://karendcampe.wordpress.com/2024/10/01/october-calendar-problems-2/

October Calendar of Problems is here! Do some #ProblemSolving with your students (or yourself) & share your working out.
ALSO BONUS CONTENT ARTICLE... check it out!#MTBoS #iTeachMath #T3Learnshttps://t.co/IJkHjsRb4u

— Karen Campe (@KarenCampe) October 1, 2024

Video/Audio Links

What is it like to use sensemaking routines (WODB, Slow Reveal, Same/Different) with coding? Find out on our latest podcast
Curriculum Tags: All
https://talks.oame.on.ca/season-7

[New Podcast] This episode features @mdeutschmtl previewing their Oct 9th @OAMEcounts webinar "Sensemaking routines in coding class". WODB, Slow reveal code, same different but with code. More info:https://t.co/95KyY9ZtpW #mathchat #MTBoS #iTeachMath pic.twitter.com/OyANuumb4R

— OAMEtalks (@OAMEtalks) October 2, 2024

Calculus and Mean Girls, nice
Curriculum Tags: MCV4U
https://x.com/howie_hua/status/1841847428120764904

It's October 3rd, Mean Girls day, so let's learn when the limit does not exist: pic.twitter.com/UXdjnHn8Hq

— Howie Hua (@howie_hua) October 3, 2024

I love this latest episode of People I mostly admire. Such a great story of Ken Ono who dropped out of high school but went on to become a math professor who eventually helped the US swim team win Olympic medals and consulted on the film The Man Who Knew Infinity. See this and all the podcasts I've found related to math at my math podcast page.
Curriculum Tags: All
https://ontariomath.blogspot.com/p/podcasts.html

Ken Ono is a math prodigy whose skills have helped produce a Hollywood movie and made Olympic swimmers faster. The number theorist tells @StevenDLevitt why he sees mathematics as art — and about his unusual path to success. https://t.co/DXV9dj28Lu

— People I (Mostly) Admire (@MostlyAdmiring) September 30, 2024

Image Links

I like problems like this that look like they are missing info but are still do able
Curriculum Tags: Gr8
https://x.com/GeometryPuzzles/status/1841910384326017084

How to solve this geometry problem #geometry pic.twitter.com/kKbii6MLs6

— Math Lover (@GeometryPuzzles) October 3, 2024

Math Links for Week Ending Sept 6th, 2024

Featured Links

The podcast I host is starting it's 7th season and the first episode features @Sig225 talking about the new Ontario centric chatbot, ChatOAME. Listen to the podcast to get a preview and then sign up for the FREE webinar on Wednesday Sept 11th
Curriculum Tags: All
https://talks.oame.on.ca/season-7

[New Podcast] This episode features @sig225 his Sept 11th @OAMEcounts webinar "ChatOAME: AI from an Ontario Perspective", previewing an Ontario #math centric #chatbot. More info: https://t.co/95KyYa01fu

#mathchat #MTBoS #iTeachMath pic.twitter.com/WX22IM9vcK

— OAMEtalks (@OAMEtalks) September 1, 2024

Resource Links

More classic NCTM calendar problems from @KarenCampe
Curriculum Tags: All
https://karendcampe.wordpress.com/2024/07/31/august-calendar-problems/
https://karendcampe.wordpress.com/2024/09/02/september-calendar-problems-2/

Solutions are posted for August Calendar of Problems!
Enjoy #ProblemSolving w/your Ss!
Stay tuned for September calendar next week! #MTBoS #iTeachMath #T3Learns #Math #RecreationalMathhttps://t.co/NWCFGyfeTA

— Karen Campe (@KarenCampe) August 31, 2024

September Calendar of Problems is available! Enjoy some #ProblemSolving with your #Math students this month! #MTBoS #iTeachMath #T3Learns #RecreationalMath https://t.co/R8zSesltsj

— Karen Campe (@KarenCampe) September 2, 2024

@Jason_To has been doing destreaming for years but these are good ideas for any class
Curriculum Tags: All
https://www.ldatschool.ca/moves-for-effective-destreaming-in-math/

“7 Moves for Effective Destreaming in Mathematics Classes”

Every K-12 math teacher in #onted & beyond that teaches in an inclusive setting will find something useful in this article.

Thanks to @LDatSchool for giving me space to share some ideas.https://t.co/Nmzjxol3Ba

— Jason To | 杜澤信 (@Jason_To) August 30, 2024

@JamesTanton continues to treat us with pages from his book as he builds it
Curriculum Tags: All
https://gdaymath.com/lessons/gmp/9-1-chapter-content/

Finished Volume 2 and now starting Volume 3. Marching my way through college algebra content in the way my brain thinks about it all.
Feedback always so appreciated. https://t.co/gPEvhQhxhK@GlobalMathProj pic.twitter.com/KKcrzbK6Vq

— James Tanton (@jamestanton) September 2, 2024

Video Links

Who doesn't like a real world calculus problem?
Curriculum Tags: MCV4U
https://x.com/seanteachesmath/status/1830014338079330780

Calculus teachers around the world looking at their moment to shine. https://t.co/gV93npuHnd

— sean laverty (@seanteachesmath) August 31, 2024

I have to think that he didn't get his fingers right the first time he tried this
Curriculum Tags: All
https://x.com/howie_hua/status/1832184645930426403

How to count in base 2 on your fingers: pic.twitter.com/5fx3nszw8c

— Howie Hua (@howie_hua) September 6, 2024

Image Links

This problem may seem tricky but it can be used to show the power of algebra and equations.
Curriculum Tags: MTH1W
https://x.com/pickover/status/1831064835498582170

Mathematics. 1/2 Problem. pic.twitter.com/d4dH4JC9yh

— Cliff Pickover (@pickover) September 3, 2024

Math Links for Week Ending July 19th, 2024

Featured Links

I love that @Howie_Hua did a couple of videos about bar models for one and two step equations. I have been an advocate for them for years (and if you want you can see my resources for them from this blog post).
Curriculum Tags: Gr7, Gr8, MTH1W
https://engaging-math.blogspot.com/2017/01/equation-strips.html
https://x.com/howie_hua/status/1813924061304782946
https://x.com/howie_hua/status/1813924666958053553

Introducing one-step and two-step linear equations with bar models (Part 1) pic.twitter.com/eGlrAe0FNX

— Howie Hua (@howie_hua) July 18, 2024

(Part 2) pic.twitter.com/pyxqew4G7h

— Howie Hua (@howie_hua) July 18, 2024

Resource Links

Who doesn't need a good set of math starters?
Curriculum Tags: All
https://x.com/geoffkrall/status/1813588450916122955

Here is the landing page for a school year's worth of Illuminating 5th-to-6th grade warm ups.

These 180 quick tasks are crafted with an emphasis on:

✅ mathematical creativity
✅ accessibility
✅ varietyhttps://t.co/62zbcz2Niu

— Geoff Krall 💫 (@geoffkrall) July 17, 2024

Video Links

Sure it's a crazy infinite series but I'm all in for a new way to calculate Pi. 
Curriculum Tags: MHF4U, MCV4U
https://www.youtube.com/watch?v=nXexsSWrc1Q

Image Links

I don't think it's important for students to memorize formulas like this, however, I do think it's good for them to know that they exist
Curriculum Tags: Gr7, Gr8, MTH1W
https://x.com/ZahlenRMD/status/1812647795226284116

Area of Regular Polygons#sharingisthenewlearning pic.twitter.com/8Mj5i1A3NP

— Reygan Dionisio (@ZahlenRMD) July 15, 2024

I love the progression of questions here (be sure to look in the comments for all of them)
Curriculum Tags: Gr7, Gr8, MTH1W
https://x.com/ProfSmudge/status/1812423219439112236

One seventh,
Part 1 pic.twitter.com/n24qrHTywP

— Professor Smudge (@ProfSmudge) July 14, 2024

Math Links for Week Ending May 24th, 2024

Featured Links

I like when teachers take the time to ruminate on what lessons THEY'VE learned over their years of teaching
Curriculum Tags: All
https://x.com/JRappaport27/status/1791912904058388711

Until schooling got in the way, math played a key role in my life.

By grade 10 I was told math class wasn’t a place for me.

I was about 5 years into my career when I fully committed myself to math education.

Here’s 20 things I’ve learned in the last 15 years. @DanShuster pic.twitter.com/58Fd9qxRX4

— Jordan Rappaport (@JRappaport27) May 18, 2024

Resource Links

If you are an eBook reader then you might want to take advantage of these deals
Curriculum Tags: All, MCV4U
https://www.amazon.com/Change-Only-Constant-Wisdom-Calculus-ebook/dp/B07NCXGQC3
https://www.amazon.com/Math-Games-Bad-Drawings-Games-ebook/dp/B09BN43BP4/

If you've been wanting the Kindle version of Math Games with Bad Drawings, now is the moment: it's currently 1/3 the usual price, just $4.99 (but my publisher and I still get paid as if it's full price!)https://t.co/5t03xGUjYf

— Ben Orlin (@benorlin) May 20, 2024

Oh, and my calculus book Change is the Only Constant is $3.99! Please enjoy this moment when a volume of popular mathematics is cheaper than a lattehttps://t.co/tk0R3sKLg9

— Ben Orlin (@benorlin) May 20, 2024

A nice optimization applet from @Geogebra
Curriculum Tags: MCV4U
https://x.com/MrValencia24/status/1792969634389369128

Today #Calculus ss got to explore optimization problems while doing some #MathPlay🧮 via @geogebra👨‍💻

Amazing resource by @panlepan🙏
🔗https://t.co/5Ow9eUseed#ITeachMath #MTBoS #MathisFun #MathChat #STEM #EdTech pic.twitter.com/TNg4FDAhiQ

— Libo Valencia 🧮 MathPlay (@MrValencia24) May 21, 2024

And now an applet to connect the volume of a cone and cylinder
Curriculum Tags: MTH1W
https://x.com/geogebra/status/1792970680331554818

🍦🥫 GEOGEBRA RESOURCE! 🧮👩‍🎓

Try this FREE GeoGebra Exploration resource to discover the relationship between the volume of cones and volume of cylinders.
Check it out!https://t.co/3hYZFF1cnZ#MTBoS #iteachmath #math #geometry pic.twitter.com/empz76z021

— GeoGebra (@geogebra) May 21, 2024

Video Links

If you are teaching Calculus then why not use some real life data. There isn't an actual Desmos file here but you can watch the video and easily see how to build it. 
Curriculum Tags: MCV4U
https://x.com/Desmos/status/1793616595094237334

Love to see this type of Chemistry application, modeling and analyzing data! 🧪🔬 https://t.co/HPzyW6q2oW

— Desmos (@Desmos) May 23, 2024

Who doesn't like a good physical fractal
Curriculum Tags: All
https://x.com/RobFathauerArt/status/1792213830673813539

pic.twitter.com/mDU1nzUSZ2

— Robert Fathauer (@RobFathauerArt) May 19, 2024

Image Links

A perfect starter for your class. Once you can see them you can't unsee them

Curriculum Tags: All
https://x.com/Rainmaker1973/status/1791126664165892516

This is called the Coffer illusion.

In this image there are 16 circles.

Can you find them? pic.twitter.com/xZe6tID4Tu

— Massimo (@Rainmaker1973) May 16, 2024

This is an interesting test of how understanding the Pythagorean Theorem is important in connecting to scale. 
Curriculum Tags: Gr8, MTH1W
https://x.com/jamestanton/status/1792121013209084289

3^2 + 4^2 = 5^2.
The lilac triangle is a right triangle.
What can you say then about the area of a tilted little square compared to the area of a non-tilted little square? pic.twitter.com/wAcJviB2u7

— James Tanton (@jamestanton) May 19, 2024

Something to help connect graphing points to something students may (or may not understand)
Curriculum Tags: Gr8, MTH1W
https://xkcd.com/2912/

Cursive Letters https://t.co/Fw9b9tCKGO pic.twitter.com/lqyc92PImR

— Randall Munroe (@xkcd) March 27, 2024

This would be a nice classroom Starter
Curriculum Tags: All
https://x.com/engineers_feed/status/1793159865487278267  

Mathematical puzzle. Find h pic.twitter.com/7nQFg6Rgod

— World of Engineering (@engineers_feed) May 22, 2024