Math Links for Week Ending Nov 14th, 2025

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Years ago I wrote about using Plickers (here) and so it was neat to see it come up. It's an almost no-tech way to do instant surveys in class.
Curriculum Tags: All
https://wecdsbit.blogspot.com/2014/11/plickers-free-clicker-app-with-almost.html

I wrote a blog post about Plickers over 10 years ago. Thanks for the reminder: wecdsbit.blogspot.com/2014/11/plic...

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— DavidPetro314 (@davidpetro314.bsky.social) November 8, 2025 at 8:52 AM

Resource Links

I love a good and practical combinatorics problem
Curriculum Tags: MDM4U
https://robertkaplinsky.com/work/how-many-soda-combinations-are-there-on-a-coke-freestyle/

Coke Freestyle machines allow you to take soft drinks and add up to 14 flavors to them. What strategies might your students use to determine how many soda combinations there are on a Coca-Cola Freestyle? robertkaplinsky.com/work/ho...

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— Robert Kaplinsky (@robertkaplinsky.com) November 5, 2025 at 6:14 PM

Video Links

The normal distribution as performance art
Curriculum Tags: MDM4U
https://x.com/Rainmaker1973/status/1988846789542441288

You can literally see the normal distribution pic.twitter.com/WdHpAD3TCE

— Massimo (@Rainmaker1973) November 13, 2025

A good starter for your class when talking about numbers or patterns
Curriculum Tags; Gr7, Gr8, MTH1W
https://x.com/howie_hua/status/1988740091372871929

Can you find 1,000 in this grid?

This is one of my favorite mathematical tasks that I give to students. pic.twitter.com/roNjuEnEE9

— Howie Hua (@howie_hua) November 12, 2025

I have always liked this falacy
Curriculum Tags: All
https://x.com/howie_hua/status/1987539561405428139

Why can't we just say 0/0=1?

I showed one way why this would break math. What's another way? pic.twitter.com/ctsm28fBjm

— Howie Hua (@howie_hua) November 9, 2025

Image Links

Who doesn't love a taxicab number?
Curriculum Tags:All
https://x.com/PhysInHistory/status/1988616819977154726

You are a math geek if you know what this number is ✍️ pic.twitter.com/LXcEMPFCql

— Physics In History (@PhysInHistory) November 12, 2025

Math Links for Week Ending Nov 7th, 2025

Featured Links

I have definitely experienced frustration from students when I don't answer their questions directly "Sir, when are you actually going to teach us?".
Curriculum Tags: All
https://robertkaplinsky.com/one-way-get-students-persevere/

Do your students ever get frustrated when you don't help them as much as they'd like? Here's what I tell them to appreciate what I'm doing for them.https://t.co/mewWggLbTM pic.twitter.com/dVywtjKL8T

— Robert Kaplinsky (@robertkaplinsky) November 3, 2025

Resource Links

Some classic NCTM calendar problems
Curriculum Tags: All
https://karendcampe.wordpress.com/2025/11/01/november-calendar-problems-3/

November is here, and so is the next Calendar of problems! Enjoy these with your students or for yourself, share your thinking here or on the post. #MTBoS #iTeachMath #T3Learns #MathSky #RecreationalMath #MathsToday karendcampe.wordpress.com/2025/11/01/n...

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— Karen Campe (@karencampe.bsky.social) November 1, 2025 at 8:19 AM

Video/Audio Links

The latest OAMEtalks podcast
Curriculum Tags: All
https://talks.oame.on.ca/season-8

[New Podcast] This episode features Stacey Jacobs previewing their Nov 12th @oamecounts.bsky.social members only webinar "Empowering Math Learners: Executive Function Strategies to Support Math Learning". More info: talks.oame.on.ca/season-8 #MathChat #MTBoS #iTeachMath

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— DavidPetro314 (@davidpetro314.bsky.social) November 3, 2025 at 11:01 PM

Math class is not a race
Curriculum Tags: Gr7, Gr8, MTH1W

https://x.com/howie_hua/status/1984623920608395686

Hot take but I always see videos of the butterfly method go viral but I would *never* teach this method and here's why. pic.twitter.com/hJplB1Tzu4

— Howie Hua (@howie_hua) November 1, 2025

Image Links

There is data about everything :-)
Curriculum Tags: MDM4U
https://bsky.app/profile/infobeautiful.bsky.social/post/3m4yr7lqxot2p

Dude, bro, buddy, fella by Quartz @qz qz.com/316906/the-d...

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— Information is Beautiful (@infobeautiful.bsky.social) November 6, 2025 at 6:55 PM

Math Links for Week Ending Oct 31st, 2025

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I always appreciate @BenOrlin's dry humour and mathematical prowess. In this case he suggests the 10 best triangles of the 2st century 
Curriculum tags: All
https://mathwithbaddrawings.com/2025/10/14/10-best-triangles-of-the-21st-century-so-far/

Resource Links

Just a bit of math and poetry with this blog
Curriculum Tags: All
https://poetrywithmathematics.blogspot.com/2025/10/can-math-be-funny.html

Video Links

This could be a great application of integers
Curriculum Tags: Gr7, Gr8, MTH1W
https://x.com/howie_hua/status/1983300047069688334

Did you know you can subtract left to right? 😱 pic.twitter.com/DkOE27dnHM

— Howie Hua (@howie_hua) October 28, 2025

Image Links

Classic math joke for Halloween
Curriculum Tags: All
https://x.com/howie_hua/status/1982895725953593773

Wear this on Halloween to scare your math teachers pic.twitter.com/J5Oud4QgPx

— Howie Hua (@howie_hua) October 27, 2025

Math Links for Week Ending Oct 24th, 2025

Featured Links

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

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

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

Resource Links

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

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

— Robert Kaplinsky (@robertkaplinsky) October 18, 2025

Video Links

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

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

— Howie Hua (@howie_hua) October 19, 2025

Image Links

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

This calculus joke 😂 pic.twitter.com/mQ6wO0QeQz

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

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

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

— vanessa vakharia (@TheMathGuru) October 14, 2025

Math Links for Week Ending Oct 17th, 2025

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I'm always happy to find something I've done that matches so well with something Howie has talked about
Curriculum Tags: Gr7, Gr8, MTH1W
https://engaging-math.blogspot.com/2017/01/equation-strips.html

This is great from @howiehua.bsky.social I have always called these "equation strips" but definitely love them for solving 1 and 2 step equations. Here are some resources I've put together engaging-math.blogspot.com/2017/01/equa... #MathChat #MTBoS #iTeachMath

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— DavidPetro314 (@davidpetro314.bsky.social) October 12, 2025 at 12:43 PM

Resource Links

Who doesn't want non routine problems? Here are 20 non routine quadratic problems from @benjamindickman.bsky.social

Curriculum Tags: MPM2D, MCR3U
https://www.desmos.com/calculator/dym2zkrvcm




If you focus on vocabulary and equity in your math class, you might want to look at some of the tips in this post:
Curriculum Tags: All
https://mathsational.blogspot.com/2025/10/bridging-gap-building-math-confidence.html

📢 New on the blog: “Bridging the Gap: Building Math Confidence Through Equity and Vocabulary” 💬✨ Empower student agency, promote rich vocab, and boost confidence. Read it now: mathsational.blogspot.com/2025/10/bridging-gap-building-math-confidence.html #MTBoS #iTeachMath

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— Jennifer Abel (@abeljennifer.bsky.social) October 12, 2025 at 11:46 AM

Looking for some good math discussion? Why not try #ElmeMathChat?
Curriculum Tags: All
https://bsky.app/hashtag/ElemMathChat

Don’t miss #ElemMathChat Join us Oct 23 when Sue Looney @looneymath.bsky.social will lead us in ‘Explore “Geometric learning in the early grades.” #ElemMathChat ⏰ 9–10pm ET | 8–9pm CT #MathEd #ITeachMath #MTBoS

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— Melynee Naegele (@mnmmath.bsky.social) October 17, 2025 at 4:24 PM

Video Links

This is a good non standard problem dealing with area of a circle
Curriculum Tags: Gr8, MTH1W
https://bsky.app/profile/howiehua.bsky.social/post/3m2weyj32jc2i

Is the 6" or 7" slice of pizza the better deal?

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— Howie Hua (@howiehua.bsky.social) October 11, 2025 at 10:20 AM

I like the way that Howie describes the solution (including the caveats)
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/1978579828770033685

What is the probability of getting a "Select all that apply" question correct just by guessing? pic.twitter.com/oYVRL32wMt

— Howie Hua (@howie_hua) October 15, 2025

I like when Howie makes videos talking about simple mathematical ideas
Curriculum Tags: MPM2D, MCR3U, MCF3M, MBF3C
https://x.com/howie_hua/status/1979320729196990802

Introduction to using zero product property to factor quadratic equations pic.twitter.com/DFwOlyGFdP

— Howie Hua (@howie_hua) October 17, 2025

I love revealing this concept to students (and teachers)

Curriculum Tags: MPM2D, MCR3U, MCF3M, MBF3C
https://x.com/howie_hua/status/1978959341156803015

Did you know completing the square literally means to complete the square? I didn't when I was in high school and that would've made it so much easier. pic.twitter.com/6ZJiH1eErK

— Howie Hua (@howie_hua) October 16, 2025

Image Links

A nice visualization of functions
Curriculum Tags: All
https://x.com/Ganeshuor/status/1979133946127618308

Mathematics may appear harsh in the beginning, but as you discover its inner beauty, it becomes a source of endless joy. pic.twitter.com/wK3lYKJEzw

— Ganesh Kumar (@Ganeshuor) October 17, 2025

Math Links for Week Ending Oct 10th, 2025

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

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

— Peter Liljedahl (@pgliljedahl) October 9, 2025

Resource Links

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

We now officially have 500 visual patterns! 🎉

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

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

— Fawn Nguyen (@fawnpnguyen) October 6, 2025

Video Links

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

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

— Howie Hua (@howie_hua) October 7, 2025

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

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

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

— Howie Hua (@howie_hua) October 8, 2025

Image Links

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

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

— Cliff Pickover (@pickover) October 2, 2025

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

Mathematics.

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

— Cliff Pickover (@pickover) October 9, 2025

Math Links for Week Ending Oct 3, 2025

Featured Links

As someone who has ADHD, it was interesting to interview a kindred spirit about his own journey and how he uses it in class
Curriculum Tags: All
https://talks.oame.on.ca/season-8

[New Podcast] This episode features Chad Harris previewing their Oct 8th @OAMEcounts members only webinar "Wait, what was I learning? Shedding light on Neurodivergent Experiences in the Classroom". More info: https://t.co/FNER2hKfFF #MathChat #MTBoS #iTeachMath pic.twitter.com/quwV0B6lQA

— OAMEtalks (@OAMEtalks) October 3, 2025

Resource Links

Some historical geometry for you
Curriculum Tags: All
https://www.quantamagazine.org/new-math-revives-geometrys-oldest-problems-20250926/

www.quantamagazine.org/new-math-rev... New Math Revives Geometry’s Oldest Problems. Using a relatively young theory, a team of mathematicians has started to answer questions whose roots lie at the very beginning of mathematics. #math #maths #geometry #enumerativegeometry #mathsky #iteachmath #MTBoS

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— Dawn Del Vecchio (@dawndelvecchio.bsky.social) September 28, 2025 at 11:54 AM

Some more classic calendar problems
Curriculum Tags: All
https://karendcampe.wordpress.com/2025/10/01/october-calendar-problems-3/

October is here & so is the next month's #ProblemSolving calendar! Share your thinking (& your students' thinking) here or on the post. #MTBoS #iTeachMath #T3Learns #RecreationalMath #MathsToday karendcampe.wordpress.com/2025/10/01/o...

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— Karen Campe (@karencampe.bsky.social) October 1, 2025 at 8:12 AM

Video Links

Some algebra, some factoring, nice
Curriculum Tags:MTH1W
https://x.com/howie_hua/status/1973882582996824123

If chicken nuggets only came in boxes of 6 and 7, what's the largest order not possible? pic.twitter.com/TDVVNgZD29

— Howie Hua (@howie_hua) October 2, 2025

Image Links

This is just your average math joke
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/1974217785669472351

Mean Girls but it's a movie about Cady learning the different types of mean. pic.twitter.com/Z7CEaIZ8Sm

— Howie Hua (@howie_hua) October 3, 2025