Math Links for Week Ending May 2nd, 2025

Featured Links

It's the OAME annual conference this week and even though there are hundreds of face to face sessions, you can take part in the virtual version from the comfort of your own couch. Register at the link below.
Curriculum Tags: All
https://mcis.oame.on.ca/

Announcing the OAME2025 Virtual Conference. Can't make it to our in-person event? Check out our Virtual Conference option and register at https://t.co/2MQTuRrtO3. @OAMEcounts pic.twitter.com/5cHpDB9Iz9

— OAMElearns (@OAMElearns) April 15, 2025

Resource Links

The latest set of classic NCTM calendar problems.
Curriculum Tags: All
https://karendcampe.wordpress.com/2025/05/01/may-calendar-problems-3/

Video Links

This is so fun.
Curriculum Tags: All
https://www.youtube.com/watch?v=MzMPK7OeHow

Image Links

You have to love 21st century pattern blocks
Curriculum Tags: All
https://bsky.app/profile/murrayh83.bsky.social/post/3lo4x63a73k2y

Some sugary data for you
Curriculum Tags: Gr7, Gr8, MDM4U
https://x.com/infobeautiful/status/1917910180387258711

Sweet teeth in the East. How much sugar in Fanta
via @simongerman600 pic.twitter.com/xOvm5Tr9Eb

— Information is Beautiful (@infobeautiful) May 1, 2025

Math Links for Week Ending Apr 25th, 2025

Featured Links

#SmudgeMath is a great way to make a question a bit friendlier and encourage work on more difficult questions. Just about any question can turn into a #SmudgedMath question but here is a bunch premade.
Curriculum Tags: All
https://www.normabgordon.com/smudgedmath-tasks

Resource Links

To me this is more evidence that mathematics is something that is discovered (by any being) and not invented (by humans)
Curriculum Tags: All
https://www.npr.org/2025/04/12/nx-s1-5359438/a-crows-math-skills-include-geometry#philsky

Video Links

Any help with understanding what fraction division means is useful.
Curriculum Tags: Gr7, Gr8, MTH1W
https://x.com/howie_hua/status/1915531531617263820

Fraction division CAN be understandable! Here are 3 ways we can think about it. pic.twitter.com/uaOPx0JLAt

— Howie Hua (@howie_hua) April 24, 2025

Image Links

I like these types of questions because, I think, at first glance they seem difficult but upon further scrutiny, they are quite do able. 
Curriculum Tags: Gr8, MTH1W
https://x.com/GeometryPuzzles/status/1914335310928101601

Simplifying radicals #radicals #algebra pic.twitter.com/OUplOLSOb3

— Math Lover (@GeometryPuzzles) April 21, 2025

Here's a nice algebra question for you 
Curriculum Tags: MTH1W
https://bsky.app/profile/PercyButtons3.mathstodon.xyz.ap.brid.gy/post/3lnjzsa5zb6n2

Math Links for Week Ending Apr 18, 2025

Featured Links

It was always one of my favourite things to find something out in the wild that would connect to the curriculum I'm teaching and make students say "hmm". Make sure you check out the comments for the answer
Curriculum Tags: MPM2D, MFM2P
https://x.com/aledaklassen/status/1911424118336999774

Is there a place for this in #mth1w?https://t.co/YKQf409CAL

And... Is this true?! I don't drink coffee. #onted

— Aleda Klassen (@aledaklassen) April 13, 2025

Resource Links

I think it's important to find things that are thing that kids might be thinking of and making money on the Internet is definitely one of them.
Curriculum Tags: Gr7, Gr8, MTH1W
https://robertkaplinsky.com/work/how-much-money-do-you-earn-for-1000000-streams-on-spotify/

Looking for a real world context for multiplying and dividing decimals? Check out my problem-based lesson called How Much Money Do You Earn For 1,000,000 Streams On Spotify?
https://t.co/BULChRpJe8 pic.twitter.com/DvZqlCImV5

— Robert Kaplinsky (@robertkaplinsky) April 11, 2025

Video Links

I love a good sum of series but I also like the explanation of the conditions when this sum doesn't have an answer
Curriculum Tags: MCR3U
https://x.com/howie_hua/status/1913005710172164429

This pattern with infinite series is not a coincidence.

Also, 1+2+4+8+...=-1???

(I don't have a good title for this one but I think it's good lol) pic.twitter.com/ByLff6nErK

— Howie Hua (@howie_hua) April 17, 2025

The beauty of mathematics 
Curriculum Tags: All
https://x.com/mathladyhazel/status/1911616202448785610

Each line produces two new lines at an angle. When two collide they don't produce new ones. The result was a pleasant surprise. [https://t.co/PuUxRQRECR] pic.twitter.com/GTvb8mwpum

— Math Lady Hazel 🇦🇷 (@mathladyhazel) April 14, 2025

Image Links

I like this kind of question because it seems harder than it is but with a little care, it should be do able. Can you guess why this was published on the 18th?
Curriculum Tags: Gr8, MTH1W
https://bsky.app/profile/percybuttons3.bsky.social/post/3ln2wzqrjkq2f

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

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

Math Links for Week Ending Apr 4th, 2025

Featured Links

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

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

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

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

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

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

A perfect math starter
Curriculum Tags: All

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

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

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