Math Links for Week Ending May 1, 2026

Featured Links

It is OAME2026 our annual Ontario Association for Mathematics Education annual conference. I presented 3 sessions this year. They can all be accessed at the link below
Curriculum Tags: All
http://bit.ly/oame-petro

I just finished My session on resources for teaching #quadratics in #math class at the @OAMElearns #OAME2026 conference. You can get the slides here:https://t.co/indBLptcoZ#MathChat #iTeachMath #MTBoS pic.twitter.com/noUx1lXUh4

— David Petro (@davidpetro314) April 30, 2026

My second session was about how to build @Amplify classroom tasks (without CL) at the @OAMElearns #OAME2026 conference:https://t.co/indBLptcoZ#MathChat #MTBoS #iTeachMath pic.twitter.com/I9cD8wqlsj

— David Petro (@davidpetro314) May 1, 2026

My third session was showing gr 7&8 #math teachers all the great premade @Amplify classroom tasks at the@OAMElearns #OAME2026 conference: https://t.co/indBLptcoZ #MathChat #MTBoS #iTeachMath pic.twitter.com/bIeHk820Cy

— David Petro (@davidpetro314) May 1, 2026

Resource Links

OAME - Great culminating activity for gr 9 math 
Curriculum Tags: MTH1W
https://drive.google.com/drive/folders/11Ofdgs5nGW4MITiB4ybyiIbuCD7DSKz4

Modelling #math by creating a Food Truck from Elysabeth Barnes at @OAMElearns #OAME2026 for grade 9 MTH1W. Get the folder of resources here:https://t.co/U3DBXYmbXY#MathChat #MTBoS #iTeachMath pic.twitter.com/IutecPjiHx

— David Petro (@davidpetro314) April 30, 2026

OAME - A great reminder of how important starters are. 
Curriculum Tags: All
https://docs.google.com/presentation/d/17wmTZGoxa-F-TU51b-uICcMzMn1Ksv5IKyWgn_odZ14/edit?slide=id.p#slide=id.p

It's @theericklee at #OAME2026 coming from the east coast to talk about the power of the first 5 min of class. With references to lots of #math class favs & including other curated math resources, check them all out here:https://t.co/OIKhSka87Y#MathChat #MTBoS #iTeachMath pic.twitter.com/cawZJxgcGi

— David Petro (@davidpetro314) April 30, 2026

OAME - Ideas that exploit AI for useful purposes in math class
Curriculum Tags: All
https://docs.google.com/presentation/d/1n-FZXTKSv6E4pG-VSgmJ0DDG8Y0qwCpT1VOFJvMwIeg/edit

Getting tips on using Google's Gemini Suite in #math class from @robinmath3 at the @oamelearns #OAME2026 conference.https://t.co/N0CSQwIVwP#MathChat #MTBoS #iTeachMath pic.twitter.com/N1zNJ5X7fo

— David Petro (@davidpetro314) April 30, 2026

OAME - Sound advice from Dr. Pam Seda
Curriculum Tags: All
http://tinyurl.com/SedaMay1

Lot's of great equity based resources shared by Dr. Pam Seda at the @OAMElearns #OAME2026 Conference Day 2 Keynotehttps://t.co/7hWJ5jVRLj#MathChat #MTBoS #iTeachMath pic.twitter.com/L6jMZ5ZRrj

— David Petro (@davidpetro314) May 1, 2026

OAME - Great session on how to turn regular rich problems into something better (and useful in a Thinking Classroom)
Curriculum Tags: All
https://www.kylewebb.ca/oame26

Great session from @webbkyle & @KirstDy on how to remix an already rich problem at the @OAMElearns #OAME2026 conference. They also shared some great problem solving resources:https://t.co/MCjVL2kWDe#MathChat #MTBoS #iTeachMath pic.twitter.com/am5ZHi0mjM

— David Petro (@davidpetro314) May 1, 2026

Video Links

A nice simple visualization of this classic probability problem. 

Curriculum Tags: All
https://x.com/howie_hua/status/2048452433895129532

This is a very common misconception in statistics:

If 1% of a population has a disease and the tests have a 5% chance of giving a false positive, what's the probability of having the disease given that we tested positive?

The answer is NOT 95%. It's actually way less. pic.twitter.com/HoLm7zOTjB

— Howie Hua (@howie_hua) April 26, 2026

More Pokemon probabilities
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/2049585872966996285

If there is a 1/4096 shiny encounter rate, how many encounters do we need to have a 99% chance of encountering a shiny Pokémon? pic.twitter.com/z3PFlBZC4m

— Howie Hua (@howie_hua) April 29, 2026

Image Links

OAME - Great stuff from @PWHarris
Curriculum Tags: All
https://x.com/davidpetro314/status/2049841170008678512

"My job as an educator is to build kids brains, not to have them get answers to math questions" - @pwharris is the opening keynote at the @OAMEcounts #OAME2026 annual conference pic.twitter.com/ceG2En8q55

— David Petro (@davidpetro314) April 30, 2026

OAME - That's definitely the reason
Curriculum Tags: All
https://x.com/davidpetro314/status/2049847083906027563

What is the purpose of teaching math? - @pwharris

To develop mathematical reasoning #OAME2026 pic.twitter.com/0QMG97e8Ls

— David Petro (@davidpetro314) April 30, 2026

Math Links for Week Ending Apr 24, 2026

Featured Links

Who doesn't want a large bank of challenging math problems?
Curriculum Tags: All
https://phys.org/news/2026-04-world-largest-olympiad-math-problems.html

phys.org/news/2026-04... World's largest collection of Olympiad-level math problems now available to everyone #Math #Maths #MathSky #MathOlympiad #iteachmath

[image or embed]

— Dawn Del Vecchio (@dawndelvecchio.bsky.social) April 23, 2026 at 5:09 PM

Resource Links

It's too late for Fawn but you can still check out the last one in this series or the summaries on the podcast
Curriculum Tags: All 
https://www.strongermath.com/mrc/

Hi hi! It's been a while.
I'm excited to share how I facilitate a 𝘃𝗶𝘀𝘂𝗮𝗹 𝗽𝗮𝘁𝘁𝗲𝗿𝗻𝘀 routine! Hope to learn from you also.

𝗦𝘂𝗻𝗱𝗮𝘆, 𝗔𝗽𝗿𝗶𝗹 𝟭𝟵, 𝗮𝘁 𝟭:𝟬𝟬 𝗣𝗠 𝗣𝗦𝗧
Register for the Math Routine Collaborative at https://t.co/mOHBC2r43C@Sneffleupagus pic.twitter.com/pj1LOpQQ67

— Fawn Nguyen (@fawnpnguyen) April 18, 2026

Radicals can be tricky so it's always good to see other approaches
Curriculum Tags: MPM2D, MCR3U, MCF3M
https://karendcampe.wordpress.com/2026/04/22/really-radical/

New blog post! "Really Radical" talks about how to handle teaching a tough topic in #algebra2 so students aren't lost in the weeds. #iTeachMath #MTBoS #T3Learns https://t.co/Qqso24wkwJ

— Karen Campe (@KarenCampe) April 23, 2026

Video Links

I can't get enough probability questions
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/2047435455516549402

The probability of finding a Pikachu in Viridian Forest is 5% so you just need 20 encounters to ensure finding a Pikachu, right? Math doesn't work out like that. Let's do the math to find the probability of encountering at least one Pikachu in 20 encounters. pic.twitter.com/iQSQCP5CyS

— Howie Hua (@howie_hua) April 23, 2026

Image Links

A nice area related question
Curriculum Tags: MTH1W
https://bsky.app/profile/stevemaths.bsky.social/post/3mkadudzuk22w

Here is the first #OCRMathsPuzzle of the summer term. Diagram shows a square ABCD with quarter circles drawn with centres at A and B, radius equal to the side length. What percentage of the square has been covered by the quarter circles? #UKMathsChat #MathsToday @cambridgeocr.bsky.social

[image or embed]

— Steve Walker (@stevemaths.bsky.social) April 24, 2026 at 6:44 AM

Math Links for Week Ending Apr 17, 2025

Featured Links

When I saw this show up in my Facebook feed, I thought for sure it had to be fake. But no, it's real
Curriculum Tags: All
https://www.calculator.org/calculators/Casio_QL-10.html

I saw this come across one of my feeds and I thought it was fake. But it turns out that in 1979, the #Casio "Calculighter" was legit www.calculator.org/calculators/... #MathChat #MTBoS #iTeachMath

[image or embed]

— DavidPetro314 (@davidpetro314.bsky.social) April 17, 2026 at 5:52 PM

Resource Links

The idea of sharing resources is the best reason to be in a space like this. The old Twitter Matheverse was great but it's getting better on Bluesky. Keep sharing, everyone
Curriculum Tags: MCR3U
https://bsky.app/profile/theericklee.bsky.social/post/3mjkzz76xd22e

Gave this warmup question to my class today. Students had to think carefully about the function and what x represents in each statement. Great discussions. @studymaths.bsky.social #ITeachMath #MathSky

[image or embed]

— Erick Lee (@theericklee.bsky.social) April 15, 2026 at 7:22 PM

Video Links

I'm not a fan of math "tricks" but I am a fan of anyone who can explain why they work
Curriculum Tags: Gr8, MTH1W
https://x.com/howie_hua/status/2044875275566268435

Visually showing why "keep change flip" works pic.twitter.com/EbxAUwr7F0

— Howie Hua (@howie_hua) April 16, 2026

Image Links

This is a good lesson in the Commutative Property of multiplication and also the idea of trying to do a similar problem that is easier but has the same answer. 
Curriculum Tags: Gr8, MTH1W
https://bsky.app/profile/pwharris.bsky.social/post/3mjnkqgjzwc2h

#TryThisThursday Try Would You Rather as such a great routine to get students thinking and sharing about mathematical relationships. Which is your favorite and why? #MathIsFigureOutAble #MTBoS #ITeachMath #MathEd

[image or embed]

— Pam Harris (@pwharris.bsky.social) April 16, 2026 at 7:27 PM

Math Links for Week Ending Apr. 10, 2026

Featured Links

You can always count on @DavidKButler to go deep on a very cool math concept. This is perfect for showing the connections of different branches of math.
Curriculum Tags: All
https://davidkbutler.xyz/2026/04/10/home-away-geometric-arithmetic/

New blog post about my method of doing addition and multiplication using the geometry of parallel lines. It's called "Home & Away: Gometric Arithmetic". davidkbutler.xyz/2026/04/10/h...

[image or embed]

— David K Butler (@davidkbutler.bsky.social) April 10, 2026 at 2:23 AM

Resource Links

When I was a kid we made stop motion "movies" by drawing stick figures in novels. So it makes perfect sense to me to do stop motion for math too. 
Curriculum Tags: All
https://www.edutopia.org/article/stop-motion-movies-school-math

Stop-motion movies are made by recording one small change at a time—the perfect medium for capturing several fundamental math concepts! 📹 #MathSky #ITeachMath #EduSky

[image or embed]

— Edutopia (@edutopia.org) April 3, 2026 at 6:18 PM

Video Links

I love taking what seems like a trick then making it real by doing the math
Curriculum Tags: MTH1W
https://x.com/howie_hua/status/2042018764808667479

A quick way of finding a fraction between two fractions pic.twitter.com/Nk7DgkkyDP

— Howie Hua (@howie_hua) April 8, 2026

Image Links

A classic demonstration 
Curriculum Tags: Gr7, Gr8, MTH1W
https://bsky.app/profile/math-problems.bsky.social/post/3mizkibgkcc2n

Demonstration of Triangle Sum #iteachmath #geometry

[image or embed]

— math-problems.bsky.social (@math-problems.bsky.social) April 8, 2026 at 8:29 PM

Math Links for Week Ending Apr 3, 2026

Featured Links

I love this visual
Curriculum Tags: MCV4U
https://x.com/howie_hua/status/2038341287603282340

You can do this calculus problem with just any random book 😱 pic.twitter.com/LGndHMlJ81

— Howie Hua (@howie_hua) March 29, 2026

Resource Links

You can never have enough sources of resources
Curriculum Tags: All
https://www.resourceaholic.com/2026/04/5-maths-gems-197.html

New! My 197th gems post. Ideas, updates and resources for maths teachers. 💎 www.resourceaholic.com/2026/04/5-ma... #ukmathschat #mathstoday #alevelmaths

[image or embed]

— Jo Morgan (@mathsjem.bsky.social) April 3, 2026 at 6:40 AM

The latest classic NCTM calendar
Curriculum Tags: All
https://karendcampe.wordpress.com/2026/04/01/april-calendar-problems-4/

The April #ProblemSolving Calendar is posted & that's no fooling!!
Plus March solutions as well.
Share your working out & thoughts here or on the post. #iTeachMath #MTBoS #MathsToday#RecreationalMath #MathChathttps://t.co/yAZPMe109h

— Karen Campe (@KarenCampe) April 2, 2026

 

Video Links

People complain that things are worse now. The data says otherwise
Curriculum Tags: MDM4U
https://x.com/toddrjones/status/2039771217553461667

Here are some ways in which the world has gotten better. pic.twitter.com/v1Py5NtQ7L

— Todd Jones 🦊 (@toddrjones) April 2, 2026

Fibonacci to the party
Curriculum Tags: All
https://x.com/howie_hua/status/2039721193918648801

Let's learn about the golden ratio pic.twitter.com/iMnoH4d8Qd

— Howie Hua (@howie_hua) April 2, 2026

Image Links

Very nice prompt
Curriculum Tags: Gr7, Gr8, MTH1W
https://bsky.app/profile/mathsvault.bsky.social/post/3milwnnonl52w

Discuss — Factors of a number #maths #mathsteacher #UKMathsChat #GCSEMaths #MathsChat #Discussion #MathsDiscussion #TalkTasks #FactorsOfANumber

[image or embed]

— Jon @ The Maths Vault (@mathsvault.bsky.social) April 3, 2026 at 10:30 AM

Another nice prompt
Curriculum Tags: Gr7, Gr8, MTH1W
https://bsky.app/profile/tilefarmer.bsky.social/post/3mikm2thrvk26

#ElemMathChat Q7 “Last Tile Standing” is another one of my favorites (for Tile Farm’s version go to tiletalk.tilefarm.com). I’ve chosen one of the 24 patterns above, can you think of yes/no questions that could help eliminate options? Ask and I’ll answer yes/no. Can comment below if easier.

[image or embed]

— Alex Romero (@tilefarmer.bsky.social) April 2, 2026 at 9:48 PM

Math Links for Week Ending Mar 27th, 2026

Featured Links

A weekly prompt? I like the idea of the cross curricular math activity
Curriculum Tags: All
https://denisegaskins.com/2026/03/26/thinking-thursday-leo-tolstoy/

Thinking Thursday: Leo Tolstoy Try this week's math journaling prompt with your kids! #homeschooling #mathjournal #letsplaymath #mtbos #iteachmath

[image or embed]

— Denise Gaskins (@denisegaskins.com) March 26, 2026 at 9:01 AM

Resource Links

Check out all the Tape diagrams
Curriculum Tags: All
http://bit.ly/TapeDiagramTuesday

It's time for #TapeDiagramTuesday!Here's what to do: 1. Pick a problem. 2. Solve it using a tape diagram to model your thinking. - - - - OR - - - - Give the problem to your students to model. 3. Share your model with #TapeDiagramTuesday #iTeachMath

[image or embed]

— Duane Habecker (@duanehabecker.com) March 24, 2026 at 8:00 AM

Video Links

Nice geometric video
Curriculum Tags: All
https://bsky.app/profile/maria-naturalmath.bsky.social/post/3mhv2cwtef22x

So pleasing to watch! #iTeachMath

[image or embed]

— Maria D. at Natural Math (@maria-naturalmath.bsky.social) March 25, 2026 at 8:04 AM

You just have to keep it slow and think logically
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/2036907773926269435

Let's learn about conditional probability pic.twitter.com/KfupYfT7HV

— Howie Hua (@howie_hua) March 25, 2026

Love the Monty Hall Problem
Curriculum Tags: MDM4U
https://x.com/howie_hua/status/2037257191930130688

Let's understand the Monty Hall problem pic.twitter.com/dFlv8gd2uZ

— Howie Hua (@howie_hua) March 26, 2026

Image Links

Pattern Block Fun
Curriculum Tags: All
https://bsky.app/profile/murrayh83.bsky.social/post/3mhvofspfx22e

Pattern block play! #21CenturyPB #iTeachMath

[image or embed]

— Hana Murray (@murrayh83.bsky.social) March 25, 2026 at 2:04 PM

Math Links for Week Ending Mar 20th, 2026

Featured Links

In the end, this is a pretty simple idea. Basically it is this: create a review (or set of questions) where each answer is the same but don't tell them. I like the idea of a self checking assignment and (in this case) a fun April Fool's prank
Curriculum Tags: All
https://mathycathy.com/2026/03/the-april-fools-day-math-activity-students-never-forget/

Resource Links

Don't forget Slow Reveal Graphs. @JennaLaib continues to add to the collection with this one with Canadian data
Curriculum Tags: All
https://slowrevealgraphs.com/2026/03/17/percentage-of-canadian-population-that-is-asleep-by-time-of-day/

New #SlowRevealGraph: How many Canadians are awake at any given time of day?

[image or embed]

— Jenna Laib (@jennalaib.bsky.social) March 17, 2026 at 5:05 PM

Video Links

I think approaching this problem in this way makes it more like a puzzle and less like math for students
Curriculum Tags: MTH1W
https://x.com/howie_hua/status/2034721609421135881

How can we find all integer solutions to 3x+2y=100?

Here's a quick introduction to solving linear Diophantine equations. pic.twitter.com/WKue0mgPQZ

— Howie Hua (@howie_hua) March 19, 2026

This was always one of my favourite little problems to do 
Curriculum Tags: MTH1W
https://x.com/howie_hua/status/2034454153213378694

Let's learn how to convert a repeating decimal into a fraction pic.twitter.com/FgO9au6HdJ

— Howie Hua (@howie_hua) March 19, 2026

Image Links

Fun puzzle with primes
Curriculum Tags: MTH1W
https://bsky.app/profile/stevemaths.bsky.social/post/3mhisdreeec2e

Continuing with the prime theme, here is today's summer inspired #OCRMathsPuzzle. Each summer symbol in the grid below represents a prime number. The sum of each row and the sum of each column are given. Work out the value of each summer symbol. #UKMathsChat #MathsToday @cambridgeocr.bsky.social

[image or embed]

— Steve Walker (@stevemaths.bsky.social) March 20, 2026 at 11:09 AM