Math Links for Week Ending July 18, 2025

Featured Links

What a great build. I love when people both have great ideas and do the heavy lifting
Curriculum Tags: All
https://classroom.amplify.com/activity/6873502673785e2ffd9fc505?checkAmplifyLogin=true

Playing Mastermind with my 6 year old inspired me to make this in #Desmos. I discovered I'm a lot worse at guessing than I thought! #MTBoS #iteachmath classroom.amplify.com/activity/687...

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— Dan Wekselgreene (@dwekselgreene.bsky.social) July 13, 2025 at 2:17 PM

Resource Links

The fact that @JennaLaib continues to add to this site means it makes total sense to continue to point it out
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U
https://slowrevealgraphs.com/

There’s a bunch of new slow reveal graphs up at https://t.co/OhsfPtDqKx!

-what fraction of Nobel Prize winners for science awards are immigrants?
- where do Americans travel within the US?
- what’s more expensive: a pound of a Porsche or a pound of pecorino?
And more!

— Jenna Laib (@jennalaib) July 13, 2025

I don't think we can have too many ways to deal with the fact that AI is on the mind of both teachers and students
Curriculum Tags: All
https://kurtsalisbury.substack.com/p/when-struggle-gets-outsourced

A few weeks back, I was honored to deliver a keynote address at a summer academy for math educators. One question has stuck with me ever since. @amplifyeducation.bsky.social #iteachmath #amplify #AI #edtech. kurtsalisbury.substack.com/p/when-strug...

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— Kurt Salisbury (@kurt-salisbury.bsky.social) July 14, 2025 at 9:09 AM

This has always been an issue. Now no matter how many times you change your Desmos graph, the link will stay the same.

Curriculum Tags: All
https://help.desmos.com/hc/en-us/articles/4405901719309-Saving-and-Sharing-Graphs

Me? Typos? Never… When you save your graph, the link now automatically updates with your latest saved edits. Learn more about saving and sharing your graphs in the Desmos Help Center: help.desmos.com/hc/en-us/art... #iteachmath

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— Desmos Studio 🔜 APAC25 (@desmos.com) July 16, 2025 at 11:25 AM

Video Links

I always appreciate a visual example of the difference between Permutations and Combinations
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/1945580493761908895

What's happening in the permutation and combination formulas? Let's make sense of them! pic.twitter.com/SQsbeYii0R

— Howie Hua (@howie_hua) July 16, 2025

Image Links

Here is your week 7 prompt
Curriculum Tags: All
https://bsky.app/profile/theericklee.bsky.social/post/3lu6kiexf3s2p

The penultimate week of #MathPhoto25 is #circles! Where do you notice circles, cylinders, spheres or ellipses in the world around you? #ITeachMath #MathsToday

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— Erick Lee (@theericklee.bsky.social) July 17, 2025 at 2:23 PM

Math Links for Week Ending Jul 11th, 2025

Featured Links

I love when people post videos like this that, to the untrained eye, do not seem like they are math related but in this case, it's a perfect video that is both quirky and can be related to rates of change. 
Curriculum Tags: Gr7, Gr8, MTH1W
https://bsky.app/profile/malmeida.bsky.social/post/3lsvylgzogs2i

New unit rate context just dropped #MTBOS #ITeachMath

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— Marco (@malmeida.bsky.social) July 1, 2025 at 11:17 AM

Resource Links

It seems like @mathequalslove is an endless supplier of great math resources. Thanks
Curriculum Tags: MTH1W
https://bsky.app/profile/mathequalslove.bsky.social/post/3ltnalupl3c2p

Rational Exponents Bingo Game for Algebra 2/Precalculus (And just pretend the word equation actually says expression. That's what I get for copying and pasting...) mathequalslove.net/rational-exp... #mtbos #iteachmath #puzzlingclassroom #mathsky #edusky

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— Sarah Carter (@mathequalslove.bsky.social) July 10, 2025 at 5:11 PM

Video Links

The math is relatively simple but the error checking of credit cards is pretty quick because of it. 
Curriculum Tags: All
https://x.com/howie_hua/status/1943299871957524906

Here is my credit card number. First come, first serve. pic.twitter.com/FsdzpzzOZr

— Howie Hua (@howie_hua) July 10, 2025

Image Links

This week's topic is up
Curriculum Tags: All
https://bsky.app/profile/theericklee.bsky.social/post/3ltmwkvwksk26

Week 6 of #MathPhoto25 is is underway! Where do you see measurements or tools used to #measure. Think measurements for distance, area, weight, time, etc. #ITeachMath

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— Erick Lee (@theericklee.bsky.social) July 10, 2025 at 2:12 PM

Math Links for Week Ending Jul. 4th, 2025

Featured Links

If @StevenStrogatz is telling you directly then you should probably do it.
Curriculum Tags:All
https://x.com/stevenstrogatz/status/1939642259701403807

My "Math, Revealed" series is freely available to anyone -- no paywall! -- in the thread below

— Steven Strogatz (@stevenstrogatz) June 30, 2025

My latest for @nytimes.com -- please repost so your followers can see this for free. www.nytimes.com/interactive/...

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— Steven Strogatz (@stevenstrogatz.com) June 30, 2025 at 6:33 AM

Resource Links

If you are working with roots and Pythagoras Theorem then you could use this as a prompt to come up with shapes that have roots of any natural number. 
Curriculum Tags: MTH1W
https://x.com/pickover/status/1940194570144559554

Math.

Beautiful Universe. Don't you just love √3 here? pic.twitter.com/cpKTPhqnOb

— Cliff Pickover (@pickover) July 1, 2025

Video Links

I always appreciate a visual proof
Curriculum Tags: MCR3U
https://x.com/howie_hua/status/1940883205466607888

Fun math fact: If you divide the first n positive odd numbers by the next n odd numbers, you will ALWAYS get 1/3. Here's why! (With a visual included!) pic.twitter.com/PfF55gyJsP

— Howie Hua (@howie_hua) July 3, 2025

Image Links

This week's prompt
Curriculum Tags: All
https://bsky.app/profile/theericklee.bsky.social/post/3lt2sk7kxcs2t

Week 5 of #MathPhoto25 is #five. Where do you see 5 objects or the number 5? #ITeachMath

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— Erick Lee (@theericklee.bsky.social) July 3, 2025 at 9:12 AM

Math Links for Week Ending June 27, 2025

Featured Links

Who knew there were so many ways to creat a mathematical insult 
Curriculum Tags: All
https://x.com/howie_hua/status/1937894299905282491

Give an insult, but make it mathematical.

— Howie Hua (@howie_hua) June 25, 2025

Resource Links

I like that @StevenStrogatz is making these articles available
Curriculum Tags: All
https://x.com/stevenstrogatz/status/1937093443936805358

This week's installment of Math, Revealed -- Let's Get Packing! Please retweet this gift link, which lets people see the article for free. https://t.co/NULrXzxJi3

— Steven Strogatz (@stevenstrogatz) June 23, 2025

Interesting idea, check out the posts to see some different ways of student thinking
Curriculum Tags: All
https://mathsuntangle.blogspot.com/

I'm starting a new blog, prompted by students I tutor, who seem tangled up in procedures. mathsuntangle.blogspot.com

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— ProfSmudge (@profsmudge.bsky.social) June 17, 2025 at 6:24 AM

Video Links

Analyzing data from the NBA
Curriculum Tags: MDM4U
https://www.youtube.com/watch?v=zAYSK34W1qk

Image Links

Nice visualization. Who knew so many people just use the same digit repeated?
Curriculum Tags: MDM4U
https://bsky.app/profile/joelbezaire.bsky.social/post/3ls7k377mzc2c

#iteachmath #notice #wonder

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— Joel Bezaire 🇨🇦 (@joelbezaire.bsky.social) June 22, 2025 at 12:58 PM

This week's prompt:
Curriculum Tags: All
https://bsky.app/profile/theericklee.bsky.social/post/3lsjdlfochs2e

This week’s #MathPhoto25 prompt is #even. Where do you see things that come in pairs? Where do even numbers show up in your world—on signs, in patterns, or in nature? #ITeachMath

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— Erick Lee (@theericklee.bsky.social) June 26, 2025 at 10:29 AM

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 June 13, 2025

Featured Links

I have always like @StevenStrogatz's writing. Here is some new stuff
Curriculum Tags: All
https://www.nytimes.com/interactive/2025/06/09/science/math-strogatz-taxi-geometry.html

My new #math series in the New York Times, "Math, Revealed," is aimed at everyone, whether you love math or not. Have a look! You can read it here for free without a subscription. https://t.co/M6xe5i1vPq

— Steven Strogatz (@stevenstrogatz) June 9, 2025

Resource Links

Some great resources from @MathEqualsLove
https://x.com/mathequalslove/status/1933289499234050060
https://x.com/mathequalslove/status/1932822439659995182
https://x.com/mathequalslove/status/1933519124791243006

A logic puzzle that uses inequality symbols? Futoshiki puzzles for the win! https://t.co/nj0AYUMhxH#mtbos #iteachmath #puzzlingclassroom pic.twitter.com/Gdto5JCiZJ

— Sarah Carter (@mathequalslove) June 12, 2025

During the last week of school, I had some students ask me if I had any coloring pages they could have. I didn't, but I did add "make mathematical coloring pages" to my to do list for this summer! https://t.co/c0IJv6qmw8#mtbos #iteachmath pic.twitter.com/vNepaWgqKh

— Sarah Carter (@mathequalslove) June 11, 2025

Simplifying Square Roots Bingo - my Algebra 3 students were majorly lacking this skill last year, so I decided to make a game to play at the beginning of the year to review this skill. https://t.co/X0Y2VZpOFV#mtbos #iteachmath pic.twitter.com/cJdU8PDr7h

— Sarah Carter (@mathequalslove) June 13, 2025

Video Links

I love the idea of deriving stuff from something simple you already know
Curriculum Tags: Gr7, Gr8, MTH1W
https://x.com/howie_hua/status/1933184489879982127

Teaching area formulas as how the shape is related to a rectangle helps build conceptual understanding.

Here's how to derive the area formulas of a parallelogram, triangle, trapezoid, kite, regular hexagon, and even a circle from the area formula of a rectangle: pic.twitter.com/QgiawtwJMK

— Howie Hua (@howie_hua) June 12, 2025

Image Links

This week's prompt
Curriculum Tags: All
https://bsky.app/profile/theericklee.bsky.social/post/3lrgcxo3cfk2h

Math Links for Week Ending June 6th, 2025

Featured Links

It's time for #MathPhoto25. Check out the week's theme and post your pic using the hashtag #MathPhoto2.
Curriculum Tags: All
https://bsky.app/profile/theericklee.bsky.social/post/3lquesarx7c2j

It's time to kick off #MathPhoto25 with #squares! Hunt for square shapes and perfect square numbers. Take photos & share on Bluesky using the hashtags #MathPhoto25 and #square. Please add alt text to your photos for increased access. #ITeachMath

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— Erick Lee (@theericklee.bsky.social) June 5, 2025 at 8:59 AM

Resource Links

Not only the prompt, but stuff about the thinking that may be needed to address it.
Curriculum Tags: All
https://denisegaskins.com/2025/05/29/thinking-thursday-quarter-the-square/

Thinking Thursday: Quarter the Square People learn math by playing with ideas. A math journal can be like a science lab book. #homeschooling #mathjournal #letsplaymath #mtbos #iteachmath

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— Denise Gaskins (@denisegaskins.com) May 29, 2025 at 9:01 AM

Video Links

It truly is a hurdle you have to help students overcome.
Curriculum Tags: All
https://x.com/howie_hua/status/1930317676607312031

As a math teacher, it feels like half of my job is building mathematical confidence. Here are some ways I do that: pic.twitter.com/EXHPnd23T1

— Howie Hua (@howie_hua) June 4, 2025

Image Links

This starts with an image prompt but the solution is via video.
Curriculum Tags: Gr8, MTH1W
https://x.com/TimBrzezinski/status/1930593136377549134

Can you solve this? 🤔 Solution: https://t.co/ZjcVrc6DWj pic.twitter.com/SPVsKT8dfH

— Tim Brzezinski (@TimBrzezinski) June 5, 2025