Math Links for Week Ending Feb 28th, 2025

Featured Links

I have always liked row games as a way to have a more interactive worksheet. The idea is that you have two columns of questions and you pair students up. Each student chooses a column and does all the questions in that column. They check their answers by seeing if they get the same value for their questions that are in the same row (even though they are different questions). They take some time and planning to create so it's always great when someone makes one (or some). Here are some that I've made.
Curriculum Tags: Gr7, Gr8
https://docs.google.com/presentation/d/1AdT58PRUnooWER3s8MZyidCt2wYxeOVXQMvnBb8I1bg/edit#slide=id.p

Anyone want to test a Row Game for me? 🤞 I don't trust my eyes anymore to find errors! 😬 I am hoping solutions in each level of the table match, enough info is given, and directions make sense. Thanks!#iteachmath #HRCEmathhttps://t.co/F3dxzqNRPH pic.twitter.com/3mMrwGyMcO

— JoAnn Sandford HRCE Math (@joann_sandford) February 27, 2025

Resource Links

Volume of solids in this newsletter. Nicely done
Curriculum Tags: Gr7, Gr8
https://drive.google.com/file/d/1n9CZsGNYZy5N5aLPBBGS2ckujqus2ekB/view

Check out the latest issue of Play...Persist...Prove, my newsletter for grade 8 math teachers. I hope you like it! drive.google.com/file/d/1n9CZ... #iteachmath

[image or embed]

— JoAnn Sandford (@jsandford.bsky.social) February 28, 2025 at 7:32 PM

Video/Audio Links

Year's ago we used to have a grade 12 math course where proofs were a fundamental part of the course. I loved that course. This would have been a good relationship for it. 
Curriculum Tags: All
https://x.com/TimBrzezinski/status/1895111023096389674

Triangle angle trisector surprise https://t.co/DVTyhk46L6 pic.twitter.com/6XMND6UGvB

— Tim Brzezinski (@TimBrzezinski) February 27, 2025

This would have been another great question for that proof course from the past. But now you could use it in our grade 9 course when you talk about properties of numbers.
Curriculum Tags: MTH1W
https://x.com/howie_hua/status/1894552333889286454

There are several ways to prove that sqrt(2) is irrational but this is my favorite way to explain it: pic.twitter.com/0uIrCRX4Bk

— Howie Hua (@howie_hua) February 26, 2025

What advice would you give your 1st year teacher self?

Curriculum Tags: All

https://talks.oame.on.ca/season-7

[New Podcast] This is our last episode of the season where we asked all of our guests "What advice would you give your 1st year teacher self?". Featuring @TheMathGuru @joboaler @NatBanting @LLB_315 @sig225 &more

Listen here: https://t.co/95KyYa01fu#MathChat #MTBoS #iTeachMath pic.twitter.com/1UNDNxCkY8

— OAMEtalks (@OAMEtalks) March 1, 2025

Image Links

I am always up for a good tessellation
Curriculum Tags: All
https://bsky.app/profile/tilefarmer.bsky.social/post/3lj4lvqpstc2u

Had lots of fun recreating a pattern @n-gons.bsky.social recently posted but with a minor twist using #TileFarm studio. I used two colors for clarity, but this is made using a single tile based on a geometric series of 30-60-90 triangles. #tessellation #iTeachMath #Math #MTBoS #mathart

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— Alex Romero (@tilefarmer.bsky.social) February 26, 2025 at 7:06 PM

Math Links for Week Ending Nov 25th, 2022

Featured Links 

I'm not sure what @JRappaport27 is drinking but he's been steadily putting out quality stuff. Check out this sequence of tasks leading up to adding fractions. You can download all 78 slides at the link below:
Curriculum Tags: Gr7, Gr8
https://twitter.com/JRappaport27/status/1595145551401869313

Here's a draft of a sequence of 6 tasks. Included in the speaker notes are sample hints/prompts to support/challenge/extend thinking, sample teacher moves and assessment considerations. Feedback always appreciated :) @pgliljedahl @MrValencia24 @KirstDy https://t.co/bZ1krAsz6z pic.twitter.com/B66qn3DivI

— Jordan Rappaport (@JRappaport27) November 22, 2022

Resource Links 

In this sequence @MSBJacobs shows that you don't have to create lessons with a lot of moving parts to have students develop understanding. In this case, we are looking at algebraic expressions with a combination of virtual tiles and vertical surfaces. Check out the entire thread here:
Gr7, Gr8, MTH1W
https://twitter.com/msbjacobs/status/1595164255070085120

I tried this activity in @MsLyon16 's MTH1W class using Polypad on @MathigonOrg to help illustrate algebraic expressions. First Q: if this is x + 2 what would 3(x+2) look like? Students go to the VNPS to work in small groups: pic.twitter.com/H4EOyLnLvF

— Michael Jacobs (@msbjacobs) November 22, 2022

Video Links 

Having just done a workshop at NCTM about visualizing multiplying and dividing fractions (https://bit.ly/nctm2022petro), I totally resonate with this post.
Curriculum Tags: Gr7, Gr8
https://twitter.com/howie_hua/status/1594017134278893568

New TikTok video: How do we VISUALLY show why we flip the second and multiply when dividing fractions? pic.twitter.com/HEAVjFk0pf

— Howie Hua (@howie_hua) November 19, 2022

Nice visualization of half life
Curriculum Tags: MCR3U, MHF4U
https://twitter.com/TimBrzezinski/status/1593976532023877632

Half-life function illustrated. Notice the half-life of substance does not depend on the initial amount! https://t.co/S3qyxae5sJ & https://t.co/l9VfJbcTjd @geogebra #MTBoS #ITeachMath #math #mathchat pic.twitter.com/fmoFQwDsVx

— Tim Brzezinski (@TimBrzezinski) November 19, 2022

Image Links 

Even if you are not a fan of Pokemon, you may like this quick reminder of 8 practices all math students should engage in
Curriculum Tags: All
https://twitter.com/howie_hua/status/1594813942748311553

8 Mathematical Practices meme pic.twitter.com/bIYmq75dZY

— Howie Hua (@howie_hua) November 21, 2022

What's the minimum/maximum number of calculations needed to find the blue area?
Curriculum Tags: Gr7, Gr8, MTH1W
https://twitter.com/KH2020H0/status/1593740152798576640

What is the area of the region shaded in blue?
The below figure is a square of perimeter 24 cm. pic.twitter.com/psv7l1oVwY

— KHALID (@KH2020H0) November 18, 2022

Thank you IKEA
Curriculum Tags: Gr7, Gr8, MTH1W
https://twitter.com/mathillustrated/status/1593074964155858944

Still one of my favorite #geometry pictures from @IKEAUSA #ITeachMath #ouch pic.twitter.com/BD5PpMTm1R

— Ralph Pantozzi (@mathillustrated) November 17, 2022

Math Links for Week Ending Nov. 4th, 2022

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Are you looking for more reasons to try the #ThinkingClassroom then how about the sentiment of students who are experiencing it. 
Curriculum Tags: All
https://twitter.com/MaryBourassa/status/1587133458513551363

Why #ThinkingClassroom. A few responses when asked "What are your thoughts on this class?". Thank you @pgliljedahl for sharing your research with teachers and making it accessible. pic.twitter.com/8sn8vANvUQ

— Mary Bourassa (@MaryBourassa) October 31, 2022

Resource Links

If you follow @TimBrzezinski then you know that he is a master at making math based animations. And everyone has to start somewhere. 
Curriculum Tags: Gr7, Gr8
https://twitter.com/TimBrzezinski/status/1586521704096223232

Here’s the very first complex @geogebra animation I ever made. It was about 6 years ago. Took forever. Looking back, it’s still one of my favorites. https://t.co/mFsRWnEK5z & https://t.co/1qXNSPgnYq #MTBoS #ITeachMath #geometry pic.twitter.com/ctGVytoQLX

— Tim Brzezinski (@TimBrzezinski) October 30, 2022

Who doesn't like playing with Fractals?
Curriculum Tags: All
https://twitter.com/MathTechCoach/status/1586747251711410176

Enjoy this Fractal Dragon in @GeoGEbra. Make something you like, take a screenshot, and post a pic!https://t.co/5rAexY5jbt pic.twitter.com/HlO5I5KZoI

— Steve Phelps (@MathTechCoach) October 30, 2022

Video Links

I may be biased but I thought fellow Canadian @NatBanting's Ignite session was the best of the lot this year at #NCTMLA22. Now Thanks to @KirstDy's bootleg copy, you can see why
Curriculum Tags: All
http://natbanting.com/nctm-la-ignite/

Image Links

I've never heard of "adding one" as the camel principal. But there is a nice story in the thread for this important math tool. 
Curriculum Tags: All
https://twitter.com/TivadarDanka/status/1588131890040434688

Behold one of the mightiest tools in mathematics: the camel principle.

I am dead serious. Deep down, this tiny rule is the cog in many methods. Ones that you use every day.

Here is what it is, how it works, and why it is essential. pic.twitter.com/cevNDm2ASe

— Tivadar Danka (@TivadarDanka) November 3, 2022

This is like a "lite" version of @NatBanting's #MenuMath. Either way you should be able to get responses from students of all abilities. 
Curriculum Tags: Gr7, Gr8
https://twitter.com/JRappaport27/status/1588173149484781568

The idea is students create their own, build it, then have others solve. Interested to see what folks can come up with. Would love to see some pictures with cuisenaire rods. @KirstDy @NatBanting @pgliljedahl @BurdessAlicia @Mathgarden @DanShuster @shskaercher @davidpetro314 pic.twitter.com/qu8rfItCrH

— Jordan Rappaport (@JRappaport27) November 3, 2022

Here's a good starter for kids who have been doing area for a while or a challenge to those who are new at it. 
Curriculum Tags: Gr7, Gr8, MTH1W
https://twitter.com/dment37/status/1586632995892613121

Blue area? @geogebra #geogebra pic.twitter.com/3w9Z3GHgER

— Daniel Mentrard (@dment37) October 30, 2022

    

Math Links for Week Ending Sept. 23rd, 2022

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Next Friday I'll be speaking at #NCTMLA22. I am looking forward to talking about visualizing multiplying and dividing fractions. If you are in town, come on down and say hello. 
Curriculum Tags: Gr7, Gr8

Coming to #NCTMLA22? Start your day on Friday by checking out my session on using @desmosclassroom and @MathigonOrg's #PolyPad to visualize multiplying and dividing #fractions at 8am in Petree C#MathChat #MTBoS #iTeachMath pic.twitter.com/47ssqaUg2P

— David Petro (@davidpetro314) September 23, 2022

Resource Links

I always appreciate when someone curates the things that they find useful. I try to do that here, but there is so much that people share. In this case, @Pierre_Tranche has pared that down into the best of the best for you. 

Curriculum Tags: All
https://sites.google.com/view/mathywebsites/

For those interested, I have added a new section of some of favourite #ThinkingClassroom problem collections to my site of mathy resources.

h/t to @dhabecker @BurdessAlicia @webbkyle @MaeganGiroux https://t.co/27rZlhUvLT

— Pierre Tranchemontagne (@Pierre_Tranche) September 20, 2022

Video Links

I have been an advocate of doing this for years. In fact, I just talked about it today during a workshop I was giving. 
Curriculum Tags: All
https://twitter.com/howie_hua/status/1570194591227473921

New TikTok video: Here's what I do for the first 5 minutes of a test day pic.twitter.com/1JvpVcQjJz

— Howie Hua (@howie_hua) September 14, 2022

A rule is always better when it makes sense. 
Curriculum Tags: Gr7, Gr8

https://twitter.com/howie_hua/status/1571553473673703424

Can your students verify this is true?
Curriculum Tags: MTH1W
https://twitter.com/MagicPi2/status/1571393952539975682

Based on Pythagorean theorem#MTBoS #iteachmath #Math #maths pic.twitter.com/pqUgJgNhuB

— Idan Tal (@MagicPi2) September 18, 2022

This is a great area of polygons question

Curriculum Tags: Gr7, Gr8, MTH1W

https://twitter.com/MagicPi2/status/1571048636662054913

pic.twitter.com/xPuDVSF3vd

— Idan Tal (@MagicPi2) September 17, 2022

Image Links

What a pattern. How would you prove it's correct?
Curriculum Tags: MCR3U, MHF4U, MCV4U
https://twitter.com/pickover/status/1571222343548018692

Mathematics.

Shiver in ecstasy. Square root of 5. https://t.co/DANvUTYJVT
pic.twitter.com/IOKYdG91mb

— Cliff Pickover (@pickover) September 17, 2022

Here's that function meme you were looking for
Curriculum Tags: MCR3U, MCF3M
https://twitter.com/TheErickLee/status/1571270014585524225

Inspired by @merryfwilliams to make a function composition meme of my own. Alligators and Crocs! #ITeachMath #MTBoS https://t.co/kBkIGUBsqq pic.twitter.com/Dsk5XwdweZ

— Erick Lee HRCE Math (@TheErickLee) September 17, 2022

    

Math Links for Week Ending Aug 19th, 2022

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There is something for everyone here in terms of math content (from elementary all the way to calculus) but really it's about proving stuff. It's too bad that we don't have our old Algebra & Geometry course anymore because this would be perfect for it. However, just the visuals that he produces, alone, are worth the watch. Even the one about the "missing" in the triangle. 
Curriculum Tags: All
https://www.youtube.com/watch?v=VYQVlVoWoPY

Resource Links

Who doesn't want a mashup of Mathigon and @Fawnpnguyen's Visual Patterns
Curriculum Tags: Gr7, Gr8, MTH1W
https://mathigon.org/task/visual-patterns

Polypad is a great tool for exploring visual patterns. We've created interactive versions of 20+ visual patterns to help students engage in algebraic thinking. View the Polypad collection, some designed by @fawnpnguyen, at https://t.co/VBlH0Mhj8d pic.twitter.com/7dJaV1Qr8P

— Mathigon (@MathigonOrg) August 18, 2022

Have you been using @Desmos Activity Builder in your classroom then you may want to follow @DesmosClassroom 
Curriculum Tags: All
https://twitter.com/desmosclassroom/status/1559583373751791616

👋Hey hey—your friends at Desmos Classroom are now on Twitter! Follow us for the newest fun in math education technology. We'll be posting lessons & activities, tutorials, giveaways, events, maybe even a joke or two. Say hey! #MyDesmosClassroom #mtbos #iteachmath pic.twitter.com/RILTCz0WtP

— Desmos Classroom (@desmosclassroom) August 16, 2022

We have a pizza place near us that will sometimes replace a large pizza with two smalls not realizing that two smalls (even though together they have a total diameter that is bigger than the large) have a smaller area than the large. It's a great problem to pose to students when calculating the area of circles and this site has a nice interactive to go along with that problem
Curriculum Tags: Gr7
https://flowingdata.com/2022/07/26/pizza-exchange-rate/

Video Links

Who doesn't like moving tessellations?
Curriculum Tags: All
https://twitter.com/sjpalmer1994/status/1560576142712524800

Some assembly required... pic.twitter.com/xy28d24Uaj

— Sam Palmer (@sjpalmer1994) August 19, 2022

Who knew that repeated powers had a name?
Curriculum Tags: MTH1W
https://twitter.com/howie_hua/status/1560431211717177344

New TikTok video: Multiplication is repeated addition, exponentiation is repeated multiplication, is there something after that? pic.twitter.com/Q6sCCzqVVj

— Howie Hua (@howie_hua) August 19, 2022

I've always loved this demonstration of the binomial distribution
Curriculum Tags: MDM4U
https://twitter.com/MagicPi2/status/1560553402081447936

As you rotate the Galton Board, you set into motion a flow of steel beads that bounce with equal probability to the left or right through several rows of pegs. As the beads accumulate in the bins, they approximate the bell curve, as shown by the yellow line. pic.twitter.com/x1ic3AI1Vr

— Idan Tal (@MagicPi2) August 19, 2022

These balls trace out the perimeter of a series of regular figures all with the same side length. The visual is pretty neat. 

Curriculum Tags: All
https://twitter.com/MagicPi2/status/1560232811562401793

Dancing Points on Regular Polygons
Geogebra resource: https://t.co/bt8qllKrcd
Credit: https://t.co/eQfDhiuEvv#mtbos #iteachmath #Math #Maths pic.twitter.com/MLboTZQhTU

— Idan Tal (@MagicPi2) August 18, 2022

Do you need an idea of how to randomize groupings for your Thinking Classroom?

Curriculum Tags: All
https://twitter.com/joelbezaire/status/1559205984395993088

This is how I do my “Variable Random Grouping” #vrg , in my adaptation of a #thinkingclassroom. I don’t use all the facets of thinking classrooms but this part has been a game changer for my teaching. pic.twitter.com/pS8vwSZ15J

— Joel Bezaire (he/him) (@joelbezaire) August 15, 2022

Applications of Trig via Tom & Jerry? Well you could have your students check the math
Curriculum Tags: MPM2D, MCF3M, MCR3U
https://twitter.com/UniverCurious/status/1558834833207562243

Math is cartoons.pic.twitter.com/t1MzHKTmWU

— Universal Curiosity (@UniverCurious) August 14, 2022

Image Links

Given that we had that nice video of the binomial distribution, it's fitting that XKCD has a cartoon related to it as well. 
Curriculum Tags: MDM4U
https://xkcd.com/2659/

    

Math Links for Week Ending Aug 5th, 2022

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I know that Henri has suggested that his post where he speaks of going full force with technology as "controversial", but I think maybe just for traditionalists. There are whole banks of math teachers that think that math is just about solving equations but I like these two quotes to give you a sense of where he is going: "Many math educators consider the solving of linear equations to be the heart of algebra. The topic is often introduced early, atomized into many special cases (one-step, two-step, etc.), and the subject of endless mind-numbing practice. For many students, this carries little meaning, other than “I’m supposed to get x by itself”" and "But note that of all the conceivable equations, only linear and quadratic equations can be solved with paper and pencil. If exponential, trigonometric, or logarithmic expressions are involved, Algebra 1 techniques are useless." Check it out yourself here
Curriculum Tags: All
https://blog.mathed.page/2022/08/04/technology-in-math-education/

New post, possibly controversial: going all in on techhttps://t.co/5bdxPz3bDH#mtbos #iteachmath #mathed pic.twitter.com/VnnhjtTOzu

— Henri Picciotto (@hpicciotto) August 4, 2022

Resource Links

If you are doing any work on working with equations (Eg, subbing values in) then this equation about measuring "good value" might be a great conversation starter too. 
Curriculum Tags: Gr7, Gr8, MTH1W
https://twitter.com/tomrocksmaths/status/1554101589719252999

My formula for good value has been picked up by @DailyMirror - give it a go for yourself to see what is, and isn't, good value. Full article at the link below.

Formula based on research from @Plusnet in celebration of Yorkshire Day (August 1st). https://t.co/owx4jJGs7D

— Dr Tom Crawford (@tomrocksmaths) August 1, 2022

Video Links

If you are doing any work with area of quadrilaterals then this might be a great problem to work on and if you want to get kids started, here is a triangle only version using Desmos Geometry.
Curriculum Tags: Gr7, Gr8, MTH1W
https://twitter.com/MagicPi2/status/1554007752149811200

pic.twitter.com/wYbgRm5UX8

— Idan Tal (@MagicPi2) August 1, 2022

Image Links

Week 8 of #MathPhoto22 is all about #angles
Curriculum Tags: All
https://twitter.com/meganisalanis/status/1554920041912487936

Kia ora koutou, hi everyone - this week's #MathPhoto22 is all about #angles (I'm from New Zealand and the te reo Māori word for angle is koki).

The photos so far each week have been fantastic! What a great way to connect, find and share ideas with a keen group of people. pic.twitter.com/Eu1rSWINuP

— Megan Me-Wi (@meganisalanis) August 3, 2022

Math Links for Week Ending Jul. 8th, 2022

Featured Links

Make sure you follow the whole thread to see how he creates his own custom tile via #Polypad 
Curriculum Tags: All
https://twitter.com/Trianglemancsd/status/1545087885115891718

Here is one of my favorite specialty tiles from the deep triangleman archives. pic.twitter.com/vg2Rqpci6g

— Christopher Danielson (@Trianglemancsd) July 7, 2022

Resource Links

Some proportional reasoning and area of trapezoid resources (among other things) listed here
Curriculum Tags: Gr7, Gr8, MTH1W
https://twitter.com/mathsjem/status/1543516195332161537

New! My 159th gems post. Ideas, resources and updates for maths teachers. 💎

Hat tips to follow!https://t.co/KyceMJ6MLp#mathsgems #teammaths #mathschat pic.twitter.com/tXAfWpqDI4

— Jo Morgan (@mathsjem) July 3, 2022

A nice pile of Thinking Classroom resources including stuff specifically for MTH1W
Curriculum Tags:

Gr7, Gr8, MTH1W

https://drive.google.com/drive/folders/1TS_8U1ZJFJ-3zRwcD2RHH1-In5ttA74b

Thanks to the generosity of others who have shared thinking tasks, I've been able to catalogue what's been shared and what I've accumulated over time. I've added the link below to give access. #mtbos @KirstDy @NolanFossum @pearse_margie @Sneffleupagus https://t.co/6pBnWpauio pic.twitter.com/NJA5fUfF9b

— Jordan Rappaport (@JRappaport27) September 17, 2021

A new fraction based question every day. Check them all out
Curriculum Tags: Gr7, Gr8, MTH1W

http://fractle.me/

Breaking News: Fractles have now been viewed 10,000 times! See what all the fraction fun’s about at https://t.co/CE3YoYXMfv #mtbos #iteachmath #maths pic.twitter.com/9vuobiwvsb

— Steven Greenstein (@Psyclist) July 3, 2022

I have seen many of these visual proof's of the angle sum triangle theorem (I've made a few myself) but I kinda like this one where the corners are physically removed.
Curriculum Tags: Gr7, Gr8
https://twitter.com/TimBrzezinski/status/1544481117314637827

Triangle interior angles: Alternate exploration. Made with @geogebra : https://t.co/6IWd8a4XmW #MTBoS #ITeachMath #math #MathChat #GeomChat #geometry pic.twitter.com/Ag69M157IR

— Tim Brzezinski (@TimBrzezinski) July 6, 2022

I love that these Ontario Gr7&8 Thinking Classroom tasks are broken down by expectation and by difficulty
Curriculum Tags: Gr7, Gr8
https://twitter.com/GLewisOCT/status/1544713785918750722

After #OAME2022 @pgliljedahl's Fireside Chat, Peter said pre-created #MildMediumSpicy #Assessment charts help provide access to #ThinkingClassroom. @EHorbay challenged us w/ #Transformations @BartVanslack. Here's🔗Gr7: https://t.co/v3VOKFhIZV and 🔗Gr8: https://t.co/HhDabxYkw0 pic.twitter.com/LBdaiJ7lDc

— Gerard Lewis, OCT (@GLewisOCT) July 6, 2022

Video Links

I was reminded of this nice visualization from @MagicPi2
Curriculum Tags: MTH1W
https://twitter.com/SteveStuWill/status/1544088845079089152

Visual proof that the exterior angles of a polygon add up to 360 degrees. 👍

Credit: @MagicPi2 https://t.co/H13V7wOPaN pic.twitter.com/1gzdYRBMWM

— Steve Stewart-Williams (@SteveStuWill) July 4, 2022

Image Links

Way back when I was a kid and there were only rectangular Legos, most of mine were red and white
Curriculum Tags: All
https://twitter.com/simongerman600/status/1543596683690393601

Cool chart by @neilrkaye shows the distribution of brick colours in the current Lego sets. Are the Star Wars sets the reason for the black and white dominance? pic.twitter.com/tXqAzo68iy

— Simon Kuestenmacher (@simongerman600) July 3, 2022

They both look like they could be kites but you have to employ a bit of Pythagorus' theorem to figure out which.
Curriculum Tags: Gr8

https://twitter.com/StudyMaths/status/1544403600792772609

Which, if any, is a kite? pic.twitter.com/veOy9pPyad

— Jonathan Hall (@StudyMaths) July 5, 2022

This week's #MathPhoto22 is all about #Estimation
Curriculum Tags: All
https://twitter.com/mary_mauger/status/1545004247628091392

"Welcome to Week 5 of #MathPhoto22! This week, we’re looking for images and situations that encourage #estimation. Take photos & share to Twitter using hashtags #MathPhoto22 and #estimation. #MTBoS #iTeachMath #estimation180 pic.twitter.com/JdkRBAtO9n

— Mary Auger☮️ (@mary_mauger) July 7, 2022

    

Math Links for Week Ending June 3rd, 2022

Featured Links

This is not the first time I have shared this resource (and I will probably share it again) but I really love it and think it's good to get a reminder of it. It's an article titled "Never say anything a kid could say" and it basically about the different ways that you can stop telling stuff in your class and move to a classroom environment where kids do all the telling. It's a great read. Thanks to @RobertKaplinski for sharing this again. 
Curriculum Tags: All
https://robertkaplinsky.com/never-say-anything-a-kid-can-say/

The article Never Say Anything A Kid Can Say was pivotal in my career because it made my struggles feel normal and gave me a path forward to improve. So, here's my love letter to Steve Reinhart's article: https://t.co/Cr4l6pi47W #MTBoS pic.twitter.com/oLIL7E86JW

— Robert Kaplinsky (@robertkaplinsky) June 2, 2022

Resource Links

This is just a reminder that if you ever have a student who asks to make a 3D model of their project, let them
Curriculum Tags: All
https://twitter.com/martinsean/status/1529922378230206464

A student emailed me and asked if they could do their spiral of Pythagoras project in 3D. Puzzled I said yeah. Here’s what they turned in. When you look from birds eye view it lines up with sketch on the wood! I asked her if I could keep it but they understandable want it back. pic.twitter.com/VvWVmGdd6q

— Martin Joyce (@martinsean) May 26, 2022

Definitely a challenge but still do able and it seems like there is more than one way to get the answer
Curriculum Tags: MTH1W
https://twitter.com/pickover/status/1530235001924726784

Mathematics and mystery.

Do we have sufficient information to find the angle x in this set of squares? https://t.co/7ApHQAAKC7

“Geometry aims at knowledge of the eternal.”
~ Plato, Republic, c. 380 BC pic.twitter.com/JRAGeJ0tha

— Cliff Pickover (@pickover) May 27, 2022

Video Links

So I don't know if you need to watch this whole video but the part that pertains to math is kinda neat. Though he doesn't say why this works. I think that you could use it as a way to show a specific practical connection to trig. You could start at 530 ish to get right to the math part. 
Curriculum Tags: MPM2D, MCR3U, MCF3M
https://youtu.be/LLWFHiShyJ4?t=328

A few from @Howie_Hua starting with this one on a property of multiples of 13
Curriculum Tags: Gr7, Gr8
https://twitter.com/howie_hua/status/1530228821999267840

New TikTok video: A cool pattern I didn't notice until recently pic.twitter.com/7Rr8Pcuo1J

— Howie Hua (@howie_hua) May 27, 2022

This is a nice little tweak to the way you interact with your kids by changing the way you ask "Do you have any Questions?"
Curriculum Tags: All
https://twitter.com/howie_hua/status/1532498839503925248

New TikTok video: Say "Ask me at least two questions" rather than "Do you have any questions?" pic.twitter.com/VkWm1imWGQ

— Howie Hua (@howie_hua) June 2, 2022

Connecting area to perimeter

Curriculum Tags: Gr7, Gr8

https://twitter.com/howie_hua/status/1532150582068228096

New TikTok video: My guess on why we think cutting sandwiches diagonally makes bigger pieces pic.twitter.com/UuYyPl9Jp7

— Howie Hua (@howie_hua) June 2, 2022

Even if you don't teach circle properties, there are probably many places you could fit in this property. And if you want, here is a dynamic Desmos version. 
Curriculum Tags: MTH1W
https://twitter.com/MagicPi2/status/1531928068008431618

pic.twitter.com/lwb0yJmY0I

— Idan Tal (@MagicPi2) June 1, 2022

Image Links

Yup, makes sense. 
Curriculum Tags: All
https://twitter.com/PabloCChristo/status/1530830940255178754

pic.twitter.com/WM0Eufz19z

— Pablo C Christo (@PabloCChristo) May 29, 2022

The horror
Curriculum Tags: MPM2D, MCR3U, MCF3M
https://twitter.com/howie_hua/status/1531797373520707584

When someone thinks sin(x)/x=sin: pic.twitter.com/hTzRaYx1h6

— Howie Hua (@howie_hua) June 1, 2022

A fraction clock to use as a math starter.
Curriculum Tags: Gr7, Gr8
https://twitter.com/MagicPi2/status/1532264256091078656

pic.twitter.com/rq9AD5Fzkg

— Idan Tal (@MagicPi2) June 2, 2022

Math Links for Week Ending Mar 25th, 2022

Featured Links

You know, sometimes you have seen something your whole life and not really noticed it and then someone comes along to point directly at it and you think "yup, that is cool"
Curriculum Tags: Gr8, MTH1W
https://twitter.com/howie_hua/status/1506785311904321539

New TikTok video: Can I just say how beautiful the decimal representation of sevenths is? pic.twitter.com/Daz2Os0qiX

— Howie Hua (@howie_hua) March 24, 2022

Resource Links

I think we may all have seen this development of the area of a circle but it is nice to have a concise play by play like the one given in this @MathisVisual post. 
Curriculum Tags: Gr7, Gr8
https://mathisvisual.com/area-of-a-circle/

Video Links

More from @Howie_Hua here in this video where he talks about why we don't need common denominators when we multiply fractions. Often students do this because they had it hammered into their heads with adding fractions. It's not wrong to do but it's not necessary. That being said, it's actually helpful to get common denominators when dividing fractions. 
Curriculum Tags: Gr8
https://twitter.com/howie_hua/status/1506064111263629317

New TikTok video: Why don't we need common denominators when multiplying fractions? pic.twitter.com/wMTD2cdC6a

— Howie Hua (@howie_hua) March 22, 2022

Image Links

A lot of @Howie_Hua this week but, hey, when the stuff is good, it's good. I could see doing this with terms related to each grade level or course. 
Curriculum Tags: All
https://twitter.com/howie_hua/status/1507491790999281670

Find your birthday and describe what your (possibly) new math term might look like. pic.twitter.com/kr7i92Aljf

— Howie Hua (@howie_hua) March 25, 2022

    

Math Links for Week Ending Feb 25th, 2022

Featured Links

I know it's early for Pi Day but you might want to cue this lesson up when the time comes. Watch the video and get all the goods here:
Curriculum Tags: Gr7
https://mathisvisual.com/circumference-of-a-circle/

Resource Links

It seems @TimBrzezinski has been going full force in creating dynamic @OpenMiddle interactives, this time it's histograms:
Curriculum Tags: MDM4U
https://twitter.com/TimBrzezinski/status/1495955519453999111

New @openmiddle histogram ex: Using digits 0-9 no more than 1x each, fill in the blanks to make true statements. Bar heights also modifiable. What are the highest and lowest possible %s we can create for 2nd condition? 🤔 https://t.co/WAWGF3w3WT @geogebra @robertkaplinsky #MTBoS pic.twitter.com/3vawL6DNxV

— Tim Brzezinski (@TimBrzezinski) February 22, 2022

These Central Tendency puzzles from @MarkChubb3 remind me of skyscraper puzzles (just not as visual) but I think that being able to solve these would be a great indicator that they are starting to understand central tendency.

Curriculum Tags: Gr7, Gr8
https://buildingmathematicians.wordpress.com/2022/02/19/central-tendencies-puzzles/

Video Links

I can't help it, I have a soft spot for anything to do with the quadratic formula (those who know me, know why). But I do appreciate how he incorporates the visual version of what completing the square is.
Curriculum Tags: MPM2D, MCR3U, MCF3M
https://twitter.com/howie_hua/status/1496659072463998980

New TikTok video: How to derive the quadratic formula pic.twitter.com/P4lBuCIJYG

— Howie Hua (@howie_hua) February 24, 2022

Too many math communicators here to mention celebrating this past twos-day 

Curriculum Tags: All
https://www.youtube.com/watch?v=Ffa8-S_71xo

We have another preview episode for #OAME2022. This time with featured and keynote speakers from the last two days. 

Curriculum Tags: All
https://talks.oame.on.ca/season-4

Image Links

This is a pretty good idea to put up in a classroom or a hallway. 
Curriculum Tags: All
https://twitter.com/GoslinK123/status/1496257845767122944

Our Math Hall way @LaSalle_LDSB has some collaborative games and activities to do with friends at lunch or break. Come check them out. #LssPride #KnightsPride #wallGames #activitiesToSocializeOver #BlackAndGold #MathGames #LDSB #YGK #MTBoS pic.twitter.com/TBmrFc1dlL

— Kat Hendry (@GoslinK123) February 22, 2022

   

Math Links for Week Ending Nov. 12th, 2021

Featured Links

With coding being new to the grade 9 math curriculum, I don't think there can be any shortage of materials or discussions that can be had to help. In this post @MSBJacob he goes over a lesson on coding dealing with patterning from beginning to end. 
Curriculum Tags: MTH1W
http://themathguy.blogspot.com/2021/10/coding-in-new-grade-9-de-streamed-math.html

Resource Links

I like how @MarkChubb3 has modified @JennaLaib's "Number Boxes" activity to help students with metric unit conversions
Curriculum Tags: Gr7, Gr8
https://buildingmathematicians.wordpress.com/2021/11/06/number-boxes/

The nice thing about these Esti-Mysteries from @SteveWyborny is they start out as estimation questions but then they turn number sense problems.

Curriculum Tags: All
https://stevewyborney.com/2021/11/150-new-esti-mysteries/

Video Links

Math play is important in any grade. In this webinar from @MrValencia24
Curriculum Tags: MTH1W, MPM2D, MCR3U
https://www.youtube.com/watch?v=lftzcFRNct4

I'm not sure why I like this loop so much but it is so satisfying
Curriculum Tags: All
https://twitter.com/hemigon/status/1457204132436086788

#Nodevember days 5 & 6
prompt: "5 sided"#b3d #geometrynodes #nodevember2021 pic.twitter.com/n9erKftRKQ

— hemigon (@hemigon) November 7, 2021

I've seen both of these proofs before but I like the idea of using common found objects. The gum was particularly nice. 
Curriculum Tags: Gr7, Gr8
https://twitter.com/howie_hua/status/1458600157331660801

New TikTok video: Two ways to show why the area formula of a circle is pi*r^2 pic.twitter.com/xyayQGSu3b

— Howie Hua (@howie_hua) November 11, 2021

Image Links

This could be true of all math students with regular problems
Curriculum Tags: All
https://xkcd.com/2529/

     

Math Links for Week Ending May 28th, 2021

Featured Links 

I love how we can take a mistake that kids often make (adding across with fractions) and make a real thing. I also like the idea of taking a mistake a student makes and turning it into something correct. In this case Farey means. 
Curriculum Tags: Gr7, Gr8
https://twitter.com/howie_hua/status/1395802373252026369

New TikTok video: What happens if we add fractions across? pic.twitter.com/RDfU7AHYKL

— Howie Hua (@howie_hua) May 21, 2021

Resource Links 

I like this @Desmos activity about nets that basically asks " is this a net?"
Curriculum Tags: Gr7, Gr8
https://twitter.com/kate_selkirk/status/1394329165936136192

Can't stop. Won't stop. Another @desmos activity... this time featuring #nets #math #mtbos #iteachmath There a videos revealing answers that are hidden until a kid writes a verbal explanation.
Check out this @Desmos activity: Nets 1 ~ Day 144! https://t.co/vtz8DNLdTr

— Kate Selkirk-Litman (@kate_selkirk) May 17, 2021

Right now most of the @OnMathies apps are down since they were all built with Flash. But the Mathies team has funding from the ministry to rebuild these apps in HTML5. You can check out the beta version of the colour tiles app here:
Curriculum Tags: All
https://twitter.com/ONmathies/status/1397994513310830599

mathies Colour Tiles, Money and Fraction Strips are in development for HTML 5 - see https://t.co/cH5bt3Bpda Use the i button's Feedback Form link to report bugs, feature requests etc. Will be ready by the end of September. pic.twitter.com/Z4qoEgVVRM

— mathies.ca (@ONmathies) May 27, 2021

Video Links 

The classic grains of rice on a chessboard problem. Great for talking about powers
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://twitter.com/onlinekyne/status/1393243039531823104

Grains on a chessboard problem! pic.twitter.com/yK8xbHtYfB

— Kyne (@onlinekyne) May 14, 2021

Is there symmetry here or not?
Curriculum Tags: All
https://twitter.com/MagicPi2/status/1394391471533576193

Equilateral triangle to square dissection#mtbos #iteachmath #Math #maths pic.twitter.com/aZmJLBJ5cS

— Idan Tal (@MagicPi2) May 17, 2021

Are you working with geometric theorems? Add this to the list
Curriculum Tags: All

https://twitter.com/74WTungsteno/status/1396708335014064130

Ptolemy's Theorem:
For a cyclic quadrilateral, the sum of the products of the two pairs of opposite sides equals the product of the diagonalshttps://t.co/laij3IquP2#math #science #iteachmath #mtbos #visualization #elearning #geometry pic.twitter.com/sfqZR50Yfi

— Tungsteno (@74WTungsteno) May 24, 2021

I like giving students real applications of using math and specifically show them that real people use math to solve problems. In this video from @EngineeringExplained he goes through several equations to figure out things like the mass of a Tesla. You don't necessarily have to watch the whole video but, I think, it's still pretty interesting too. 
Curriculum Tags: Gr7, Gr8
https://www.youtube.com/watch?v=4PRi4B1APj0

Image Links 

This may seem like an image but click inside and press play for a cool surprise about curved surfaces.
Curriculum Tags: All
https://twitter.com/nhoskee/status/1395032216791445506

A @desmos interpretation of a piece by @yokoono https://t.co/Ijcfhpx3ZZ

— Chris Nho (@nhoskee) May 19, 2021

Math Links for Week Ending Apr 30, 2021

Featured Links

It was @DonFraser9 who ask the fun question about songs with numbers in the title. Which sounded like a great discussion and lots of people added songs. Why don't you join the conversation and add your favourite number based song.
Curriculum Tags: All
https://twitter.com/DonFraser9/status/1386714629355749390

Can you think of any songs with a number in the title or in a verse? #MTBoS

— Don Fraser (@DonFraser9) April 26, 2021

Resource Links

I literally was just doing this lesson today on developing the formula for area of a circle
Curriculum Tags: Gr7, Gr8
https://twitter.com/MathTechCoach/status/1385657672649908227

Still have some work to do, but how can this be used to argue that the area of a circle is pi r^2?https://t.co/BT2ST1fCuK pic.twitter.com/Pz8G6nd5C6

— Steve Phelps (@MathTechCoach) April 23, 2021

Video Links

I don't do a lot of work with parametric curves but this is outstanding. The actual Desmos sketch is in the comments. 
Curriculum Tags: MHF4U
https://twitter.com/LukeSelfwalker/status/1387749171709501441

The parametric curve of an elephant is just, I mean, just like, just, oh math goodness awesome. pic.twitter.com/FhyefmsK91

— Luke Walsh (@LukeSelfwalker) April 29, 2021

Image Links

Who doesn't like a good multiplication pattern>
Curriculum Tags: All
https://twitter.com/pickover/status/1385618267209875456

Mathematics and Number Patterns. https://t.co/IfCKgo8rAm pic.twitter.com/lFje3oQGSL

— Cliff Pickover (@pickover) April 23, 2021

Math Links for Week Ending Apr 16th, 2021

Featured Links

Given the shear amount of information we are bombarded with regarding C19 stats, it's important to make sure we talk to our students about how information is presented, even if it's just in text form. Context can be everything
Curriculum Tags: Gr7, Gr8, MDM4U
https://twitter.com/dtkung/status/1382848416636661765

Great question for a #MathForSocialJustice class:

What's misleading about the original @cnn tweet?

What's misleading about @PatFinelli's retweet?

(Don't know about CNN, but the replies make it clear that Pat knows what's wrong with his.) pic.twitter.com/uEmBf3Xzhv

— Dave Kung (龚仲孝) (@dtkung) April 16, 2021

Resource Links

I'm always looking for new ideas for doing unit reviews with students 
Curriculum Tags:All
https://twitter.com/howie_hua/status/1382491625813811200

For review sessions, I make study guides on Google Slides where each slide has a few questions on a topic. Students comment or post pictures of their solutions so they can help each other out. Rather than the teacher choosing what to review, students can choose what to work on.

— Howie Hua (@howie_hua) April 15, 2021

I think we can never have enough visuals of the proof of Pythagorean Theorem. I think that this one would be a good one to discuss with students
Curriculum Tags: Gr8, MPM1D, MFM1P
https://twitter.com/panlepan/status/1382636350596333571

Pythagoras proof animated with @geoegebra #shearing #translationhttps://t.co/GcpY0Ekl4y pic.twitter.com/QEiYAY168R

— Vincent Pantal🍩ni (@panlepan) April 15, 2021

I have created activities that use this visual proof of the sum of the angles in a triangle but I like this demo file that @TimBrzezinski created
Curriculum Tags: Gr8, MPM1D, MFM1P
https://twitter.com/TimBrzezinski/status/1381614982392123393

Messing around in @Desmos. Shout out, T/Y, & credit to @von_Oy for her insight re: defining the sector parametrically (in 3 lines): https://t.co/YijEXM8WMJ @AlgebraDesmos #MTBoS #ITeachMath #geometry #elemmathchat #msmathchat pic.twitter.com/1FqEG6xpY2

— Tim Brzezinski (@TimBrzezinski) April 12, 2021

Video Links

So many math famous people in this tribute video, can you name them all?
Curriculum Tags: All
https://twitter.com/edsouthall/status/1259937974676045825

So I asked my favourite mathematicians and maths educators if they'd help me make a tribute to Tom Lehrer...

Hope this brings you a smile! pic.twitter.com/b7esn5iHGG

— Ed Southall (@edsouthall) May 11, 2020

Image Links

A couple of math jokes Do you get them?
Curriculum Tags: Gr7
https://twitter.com/pickover/status/1382120320845369348

This is a mathematics joke involving a PIN (personal identification number). pic.twitter.com/5BXo4GB24L

— Cliff Pickover (@pickover) April 13, 2021

Curriculum Tags: MHF4U
https://twitter.com/pickover/status/1381788789220249603

This is a mathematics joke. https://t.co/efDbvEuQcE pic.twitter.com/Jn9SscMD5H

— Cliff Pickover (@pickover) April 13, 2021