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 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

Image Links

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 Dec. 13th, 2024

Featured Links

There are some good comments in the feed and I like the way the steps are laid out for adding integers but the line that resonates with me is the last part of this: "Get students really comfortable placing positive and negative numbers on number lines. Don't take this for granted"
Curriculum Tags: All
https://fivetwelvethirteen.substack.com/p/conceptual-understanding-doesnt-happen

New post: conceptual understanding doesn't happen all at once. fivetwelvethirteen.substack.com/p/conceptual... #iteachmath #mtbos #edusky

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— Dylan Kane (@dylanpkane.bsky.social) December 10, 2024 at 9:18 AM

Resource Links

The idea that there is a "best way" to teach kids has never resonated with me. There are ways for that resonate best for me but they aren't always better for students. 
Curriculum Tags: All
https://amiealbrecht.com/2024/12/11/four-ways-of-seeing-education-and-why-best-practice-is-a-myth/

NEW Blog Post: ‘Four ways of seeing education, and why "best practice" is a myth’ Why do educators disagree about 'best practice'? Understanding competing visions of education's purpose reveals why universal solutions fall short. amiealbrecht.com/2024/12/11/f...

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— Amie Albrecht (@nomadpenguin.bsky.social) December 10, 2024 at 2:34 PM

A good winter starter
Curriculum Tags: All
https://bsky.app/profile/davidporas.bsky.social/post/3lcy6ln4y6k2n

Looking for a fun, free winter activity to cap off the year? ☃️ With this new holiday activity in Desmos Classroom (using Polypad of course 😀), students can design their own winter wonderland! They’ll color snowmen, build their own snowflakes, and more. ❄️ Check it out: bit.ly/4ix92Ru

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— David Poras (@davidporas.bsky.social) December 10, 2024 at 4:26 PM

I love Fermi Problems and so this mashup with Desmos seems like a perfect pairing
Curriculum Tags: All
https://bsky.app/profile/kasmith07.bsky.social/post/3lcwam62jek2m

I wrote about how I use the @desmos.com data collection screen for a Fermi problem routine in my classroom www.edutopia.org/article/tips... and here is my Desmos collection of those screens: teacher.desmos.com/collection/6... Any other Fermi problem fans in the #mtbos #iteachmath ♾️ community?

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— Kristen Smith (@kasmith07.bsky.social) December 9, 2024 at 9:57 PM

Some Christmas math fun
Curriculum Tags: Gr7, Gr8, MTH1W
https://mathequalslove.net/christmas-tree-integer-addition-puzzles/

So many of you requested an integer version of these Christmas Tree Addition Puzzles that I had to make it happen! https://t.co/T1mTZFP81I #mtbos #iteachmath #puzzlingclassroom pic.twitter.com/hXGuoDjwLY

— Sarah Carter (@mathequalslove) December 8, 2024

Video Links

Some Christmas probability 
Curriculum Tags: MDM4U
https://bsky.app/profile/howiehua.bsky.social/post/3lcyn6rmsxs2y

What's the probability no one picks their own name while doing Secret Santa? youtube.com/shorts/U5eHd... #math #ITeachMath #EduSky

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— Howie Hua (@howiehua.bsky.social) December 10, 2024 at 8:48 PM

When I looked at this I thought I would just start with a brute force method but after one calculation it was clear I should look at something more logical. And yes, it was a non intuitive result but it made sense. 
Curriculum Tags: Gr7, Gr8, MTH1W
https://x.com/howie_hua/status/1867334829991506197

Will this answer surprise you? Or is it intuitive? pic.twitter.com/EtBL37wODW

— Howie Hua (@howie_hua) December 12, 2024

Image Links

Some of these are the same area but are they all the same area?
Curriculum Tags: Gr7, Gr8, MTH1W
https://bsky.app/profile/profsmudge.bsky.social/post/3ld6iydz77c2y

Week 20: What fraction of each square is tinted green? More in the blog: satisfry.blogspot.com

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— ProfSmudge (@profsmudge.bsky.social) December 13, 2024 at 4:48 AM

I love a cross curricular post
Curriculum Tags: MCR3U, MHF4U, MAP4C, MCT4U
https://bsky.app/profile/kityates.bsky.social/post/3lcwrjevf4d2q

I Wrote a Poem about exponential growth...

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— Kit Yates (@kityates.bsky.social) December 10, 2024 at 3:00 AM

Math Links for Week Ending Dec 6th, 2024

Featured Links

I am a big fan of rethinking traditional assessment methods. Even small tweaks in what you do can make assessment more fair for student. Here are some ideas that might get your interest
Curriculum Tags: All
https://www.edutopia.org/article/why-teachers-should-grade-less-frequently

In my latest Edutopia article, Stanford prof. Denise Pope points out the glaring problem with grades: “The first thing kids would do is go to the back of the paper, look at the grade, and never read my comments." 9 reasons why teachers should grade less: www.edutopia.org/article/why-... #EduSky

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— Youki Terada (@youkiterada.bsky.social) November 25, 2024 at 1:22 PM

Resource Links

Here is the classic December NCTM calendar
Curriculum Tags: All
https://karendcampe.wordpress.com/2024/12/01/december-calendar-problems-3/

December #ProblemSolving Calendar is here! Enjoy & share your process here. Also: BONUS articles on Mathematical Curiosity. Sign up to get an email for new posts 😊 (help me crack 100 followers?) #MTBoS #iTeachMath #RecreationalMath #MathSky #MathsToday karendcampe.wordpress.com/2024/12/01/d...

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— Karen Campe (@karencampe.bsky.social) December 1, 2024 at 12:14 PM

Here is a neat applet that can help visualize multiplcations of different types from @Knowledgehook
Curriculum Tags: All
https://manipulatives.knowledgehook.com/multiplicationgrid/

We should embrace the fact that area models with Whole Numbers, Mixed Numbers and Pure Decimals are all exactly the same. #MathSky #EduSky #ElemMathChat

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— Andrew Fenner (@numbershapes.bsky.social) December 2, 2024 at 7:39 AM

Here are some neat fractions activities from a blog who's name I love, SatisFraction
Curriculum Tags: Gr7, Gr8, MTH1W
https://satisfry.blogspot.com/

A fractions task, of sorts. More here: satisfry.blogspot.com

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— ProfSmudge (@profsmudge.bsky.social) November 19, 2024 at 4:55 AM

Video/Audio Links

Listen to our latest podcast
Curriculum Tags: All
https://talks.oame.on.ca/season-7

[New Podcast] This episode features@livelovemath314 previewing their Dec 11th @OAMEcounts webinar "Math Without Worksheets". More info: https://t.co/95KyY9ZtpW #mathchat #MTBoS #iTeachMath pic.twitter.com/PoqFierjzQ

— OAMEtalks (@OAMEtalks) December 1, 2024

Use geometric methods to discuss an optical illusion
Curriculum Tags: MTH1W
https://bsky.app/profile/tbrzezinski.bsky.social/post/3lc3n4cxjw22b

Which segment is longer? 👀 youtube.com/shorts/pAG-P... & www.geogebra.org/m/g56sjfq9 @geogebra.org #MTBoS #ITeachMath #illusion #edusky

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— Tim Brzezinski (@tbrzezinski.bsky.social) November 29, 2024 at 7:59 AM

I have always loved this puzzle. I like how you can use slope to prove how it works
Curriculum Tags: MTH1W
https://bsky.app/profile/tbrzezinski.bsky.social/post/3lbwjq3e2fs23

Area changing illusion 👀 Why does the area seem to change? 🤔 For an explanation as to why this happens, see youtu.be/6leIwa3PA2E?.... #MTBoS #ITeachMath #math #maths #illusion #paradox #edusky

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— Tim Brzezinski (@tbrzezinski.bsky.social) November 27, 2024 at 7:15 AM

Here is a nice twist on Which One Doesn't Belong that encourages student dialogue.
Curriculum Tags: All
https://bsky.app/profile/howiehua.bsky.social/post/3lcbduvyivc2r

Teaching tip: Here's how I spice up the activity "Which One Doesn't Belong?" #math #ITeachMath youtube.com/shorts/QC_is...

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— Howie Hua (@howiehua.bsky.social) December 1, 2024 at 2:30 PM

Flexible thinking at it's finest
Curriculum Tags: All
https://bsky.app/profile/saravanderwerf.bsky.social/post/3lcjoyxkgsk2c

Here was his great math Let’s put more of this on TV. Shout out to MN Sarah Carter for finding this.

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— Sara Van Der Werf (@saravanderwerf.bsky.social) December 4, 2024 at 10:10 PM

I am not a fan of mathematical tricks but I always like how @Howie_Hua explains why they work
Curriculum Tags: All
https://bsky.app/profile/howiehua.bsky.social/post/3lcjl2fj2o22z

A neat way of dividing by 5: #ITeachMath #EduSky #math

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— Howie Hua (@howiehua.bsky.social) December 4, 2024 at 8:59 PM

Get your triangle geometry puzzler warmed up
Curriculum Tags: MTH1W
https://x.com/howie_hua/status/1862541860440564223

A fun math puzzle pic.twitter.com/R1nQjIrpit

— Howie Hua (@howie_hua) November 29, 2024

I like this "impossible" problem for algebra
Curriculum Tags: MTH1W
https://x.com/howie_hua/status/1864073876319195452

Why is this rectangle impossible? (Thanks to @StudyMaths for the problem) pic.twitter.com/jBPNa9m9pQ

— Howie Hua (@howie_hua) December 3, 2024

Image Links

I think @Howie_Hua sums up what I think about these types of questions. Don't get me wrong, I think they are great. But they also show students that algebra doesn't have to be as hard as it seams.
Curriculum Tags: All
https://bsky.app/profile/afreeparticle.com/post/3lcjn5cqawc2r

Trying to have people solve a system of linear equations on social media: #math #ITeachMath #EduSky

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— Howie Hua (@howiehua.bsky.social) December 4, 2024 at 6:37 PM

Solving Equations? Try this
Curriculum Tags: MTH1W
https://x.com/pickover/status/1862852451981758578

Mathematics. Nothing but x's.

I wonder what is the value of x (aside from x = 0)? pic.twitter.com/RAGEODkGxU

— Cliff Pickover (@pickover) November 30, 2024

Where does all that plastic go?
Curriculum Tags: Gr7, Gr8, MDM4U
https://x.com/infobeautiful/status/1862525740304007255

Guess what % of plastics have been #recycled? No prizes :( pic.twitter.com/YgCP4LQPJj

— Information is Beautiful (@infobeautiful) November 29, 2024

Doing some work with diameters and radii? Try this
Curriculum Tags: Gr7, Gr8
https://x.com/GeometryPuzzles/status/1862559318039830899

Geometry challenge #geometry pic.twitter.com/aScNUc5CsV

— Math Lover (@GeometryPuzzles) November 29, 2024

I have not heard of a Gollygone before but this might be a good starter in a high school math class
Curriculum Tags: All
https://x.com/pickover/status/1862563740849246217

Mathematics.

Don't you just love Golygons? A "Golygon" is any polygon with all right angles (a rectilinear polygon) whose sides are consecutive integer lengths.

The smallest Golygon (below) has 8 sides. It's the only solution with fewer than 16 sides. https://t.co/LBKXsGKEsM pic.twitter.com/wjKoL5ENzI

— Cliff Pickover (@pickover) November 29, 2024