Math Links for Week Ending Jan 31, 2025

Featured Links

A book study for the book "Making Math Stick" is starting this week. 
Curriculum Tags: All
https://oame.on.ca/mcis/index.php

Check it out!

A virtual Making Math Stick Book Study with @oame_qslma.

Spread the word!#math #onted @PembrokePublish pic.twitter.com/PHImicQmxb

— Dr David Costello (@dr_costello) January 27, 2025

Resource Links

Some resources from @MathsJem. Some Geometry and algebra and more. I really like the one with different (related) expressions that asks students to read to each other to guess the expression.
Curriculum Tags: All
https://www.resourceaholic.com/2025/01/5-maths-gems-185.html

New! My 185th gems post. Ideas, resources and updates for maths teachers. 💎 https://t.co/YOtXh1GISK

Hat tips to follow. #mathsgems #mathschat #mathstlp #teammaths #mathscpdchat pic.twitter.com/aEOco7gs91

— Jo Morgan (@mathsjem) January 25, 2025

I use this type of example when talking about expected value with my students. That is, the idea of how the insurance industry uses expected value to figure out how to set premiums. 
Curriculum Tags: MDM4U

https://x.com/AndrewLolmaugh/status/1883899701314924839

Not at all actually. Having run Hole in One contests for the golf course, I can tell you, the dealership will purchase an insurance package that pays them the full retail value of the prize if it happens to be won. Odds of someone winning in the case of a Hole in One is 12,500 to…

— Andrew McLellan Lolmaugh (@AndrewLolmaugh) January 27, 2025

Here's a fun little activity for learning about ratios.
Curriculum Tags: Gr8, MTH1W
https://robertkaplinsky.com/work/how-much-bigger-should-they-make-zoolanders-school/

I love using this lesson to teach about scale and proportions. How many times bigger should Zoolander's school be? https://t.co/0YJjod5rck pic.twitter.com/4wLqbuMWic

— Robert Kaplinsky (@robertkaplinsky) January 27, 2025

I totally appreciate all the work that would have gone into these interactives for practicing dealing with mixed radicals and linear inequalities.
Curriculum Tags: MTH1W, MPM2D

https://bsky.app/profile/imperfectsquare.com/post/3lgsq6gl3bk2k

Solving inequalities (with negative coefficients) version of the Valentine's activity. tiny.cc/ineqvalentines. Available for anyone to use, along with printable worksheet. Simplifying radicals version at tiny.cc/radvalentines. #iteachmath #mtbos #algebra #prealgebra #edusky #mathsky

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— Sarah Shartzer (@imperfectsquare.com) January 28, 2025 at 10:06 AM

I love what I call Equation Strips or Bar Models but they are also know as Tape Diagrams. Here are links to my resources and a whole site relating to them
Curriculum Tags: Gr7, Gr8, MTH1W

https://bsky.app/profile/davidpetro314.bsky.social/post/3lgsxw7omhc2o

I have always called these equation strips but I love that he includes a link to more stuff Https://bit.ly/TapeDiagramTuesday I also have some of my own including an interactive applet & @Desmos.com Classroom activity here engaging-math.blogspot.com/search/label... #iTeachMath #MathChat #MTBoS

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— DavidPetro314 (@davidpetro314.bsky.social) January 28, 2025 at 12:24 PM

The Superbowl is coming up and so you might like this activity that uses sports betting probabilities as a real world example. And if you want to take it a step further, this podcast series on sports betting shows why you shouldn't (ie the odds and other things are stacked against you). 
Curriculum Tags: MDM4U
https://teacher.desmos.com/activitybuilder/custom/61f847b4990b4d76d1b6a5e4

I think this would pair very nicely with the latest Against the Rules podcast where the latest season is about the sports betting industry and *spoiler alert* the odds are stacked against the betters-high school betting is where it starts www.pushkin.fm/podcasts/aga... #MathChat #iTeachMath #MTBoS

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— DavidPetro314 (@davidpetro314.bsky.social) January 28, 2025 at 10:01 PM

Video Links

I have always loved the Sieve of Eratosthenes (even though I can rarely pronounce it)
Curriculum Tags: MTH1W
https://x.com/howie_hua/status/1883285081663701333

How to quickly find all prime numbers from 1 to 100 pic.twitter.com/xROH2NrGSs

— Howie Hua (@howie_hua) January 25, 2025

I used to watch the show Numbers years ago where a mathematician solved crimes. That being said, I didn't know that this new show Prime Target was also about a mathematician, this time trying to save the world with prime numbers (literally). And this substack breaks each episode down. 
Curriculum Tags: All
https://bsky.app/profile/tcorica.bsky.social/post/3lgv2lsxgc22b

Prime Target Ep.3 drops today. To catch up on the mathematics in Ep.1 and Ep.2, drop by here: timcorica.substack.com/p/prime-targ... #PrimeTarget #MathsToday #iTeachMath

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— Tim Corica (@tcorica.bsky.social) January 29, 2025 at 8:18 AM

Some real world calculus for you
Curriculum Tags: MCV4U
https://bsky.app/profile/mathmatize.bsky.social/post/3lgv6ssix3k2c

When the slide is continuous but not differentiable #MathSky

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— MathMatize Memes (@mathmatize.bsky.social) January 29, 2025 at 9:33 AM

Image Links

What math questions would you come up with?
Curriculum Tags: All
https://bsky.app/profile/gregbcurran.bsky.social/post/3lgjfbjdzzs25

Love this Maths provocation #iTeachMath

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— Dr Greg Curran (@gregbcurran.bsky.social) January 24, 2025 at 4:57 PM

Math Links for Week Ending July 19th, 2024

Featured Links

I love that @Howie_Hua did a couple of videos about bar models for one and two step equations. I have been an advocate for them for years (and if you want you can see my resources for them from this blog post).
Curriculum Tags: Gr7, Gr8, MTH1W
https://engaging-math.blogspot.com/2017/01/equation-strips.html
https://x.com/howie_hua/status/1813924061304782946
https://x.com/howie_hua/status/1813924666958053553

Introducing one-step and two-step linear equations with bar models (Part 1) pic.twitter.com/eGlrAe0FNX

— Howie Hua (@howie_hua) July 18, 2024

(Part 2) pic.twitter.com/pyxqew4G7h

— Howie Hua (@howie_hua) July 18, 2024

Resource Links

Who doesn't need a good set of math starters?
Curriculum Tags: All
https://x.com/geoffkrall/status/1813588450916122955

Here is the landing page for a school year's worth of Illuminating 5th-to-6th grade warm ups.

These 180 quick tasks are crafted with an emphasis on:

✅ mathematical creativity
✅ accessibility
✅ varietyhttps://t.co/62zbcz2Niu

— Geoff Krall 💫 (@geoffkrall) July 17, 2024

Video Links

Sure it's a crazy infinite series but I'm all in for a new way to calculate Pi. 
Curriculum Tags: MHF4U, MCV4U
https://www.youtube.com/watch?v=nXexsSWrc1Q

Image Links

I don't think it's important for students to memorize formulas like this, however, I do think it's good for them to know that they exist
Curriculum Tags: Gr7, Gr8, MTH1W
https://x.com/ZahlenRMD/status/1812647795226284116

Area of Regular Polygons#sharingisthenewlearning pic.twitter.com/8Mj5i1A3NP

— Reygan Dionisio (@ZahlenRMD) July 15, 2024

I love the progression of questions here (be sure to look in the comments for all of them)
Curriculum Tags: Gr7, Gr8, MTH1W
https://x.com/ProfSmudge/status/1812423219439112236

One seventh,
Part 1 pic.twitter.com/n24qrHTywP

— Professor Smudge (@ProfSmudge) July 14, 2024

Math Links for Week Ending Aug 5th, 2022

Featured Links

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 Mar. 11th, 2022

Featured Links

A worked example is the bread and butter of a math teacher and it has been for years. Of course, if you are heavy into the  Thinking Classroom then you might not think so anymore but I think that this post about how to make kids think while still showing worked examples starts to create a bridge between a traditional and a thinking classroom. 
Curriculum Tags: All
https://twitter.com/mpershan/status/1498092968082874368

We all can think of teachers who just talk talk talk talk while boring everyone to bits. That's bad. Meanwhile, research in favor of explicit teaching piles up.

What sort of explicit teaching actually works? Here's an essay where I make sense of this: https://t.co/nWKFooeWBf

— Michael Pershan (@mpershan) February 28, 2022

Resource Links

As I do every Pi Day (week), I feature my Pinterest page that houses all of my Pi Day resources. Videos, images, activities, etc.  And I always highlight that the Rolling Stones logo has Pi right on the tongue. 
Curriculum Tags: All
https://www.pinterest.ca/davidpetro314/pi-day/

I like the idea of visually seeing the effects of the positions of the points on the standard deviation and this interactive from @TimBrzezinski does that trick
Curriculum Tags: MDM4U
https://twitter.com/TimBrzezinski/status/1498271253291057152

Standard Deviation: Quick intuitive intro and exploration. Here, the length of either pink arrow represents the SD of this data set. What do you notice? What do you wonder? https://t.co/FL9AG5DxRT @geogebra #MTBoS #ITeachMath #statistics pic.twitter.com/qvbFUYGrWU

— Tim Brzezinski (@TimBrzezinski) February 28, 2022

I love this activity that combines some of the mechanics of Pascal's triangle and adding polynomials. I could see it used for other polynomial related operations too. 
Curriculum Tags: Gr7, Gr8, MTH1W
https://twitter.com/msbjacobs/status/1498035255978217477

I was in a Grade 9 class on Friday and gave them this task which gave them lots of opportunities to show their algebraic thinking. More details in this blog post: https://t.co/JGgzMRKXaX pic.twitter.com/QzCGFDckyg

— Michael Jacobs (@msbjacobs) February 27, 2022

You'll find this and many other activities at the link. 
Curriculum Tags: All

https://www.draustinmaths.com/algebra

⭐️ New Resources ⭐️
Finding the Equation of a Straight Line from its Graph. Two levels - integer gradients and fractional gradients. https://t.co/03Dc1xV0NP #mathsresources #mathschat #mathscpdchat pic.twitter.com/9fvtwtBzz0

— Amanda Austin (@draustinmaths) February 27, 2022

I continue to be impressed with all the interactives that are coming out of @Mathigon
Curriculum Tags: Gr7, Gr8
https://twitter.com/MathigonOrg/status/1498312261080920070

Swapping the position of faces and vertices in a polyhedron creates its “dual.” Here you can see that a dodecahedron and a icosahedron are dual. What is the dual of a cube? Learn more and explore for yourself at https://t.co/hIBPvrwn1w#math #mtbos #mathchat #edchat #duals pic.twitter.com/jxZPLzM3yP

— Mathigon (@MathigonOrg) February 28, 2022

Video/Audio Links

My PiDay Ignite video that I show each year
Curriculum Tags: All
https://www.youtube.com/watch?v=UBpw9TuzxtU

In honour of Pi Day, there are two math related stories on @TheStoryColider. Check this out and all the other Math related podcasts on my curated math podcast page. 
Curriculum Tags: All
http://ontariomath.blogspot.com/p/podcasts.html

Image Links

I have seen many versions of this clock but not with 9s yet. 
Curriculum Tags: All
https://twitter.com/pickover/status/1498125736745521158

Mathematics.

Amazing clock made of all 9s. Source: https://t.co/SYy9RiDSu4 pic.twitter.com/1UwKBZL6N5

— Cliff Pickover (@pickover) February 28, 2022

This seems to go hand in hand with the above clock of 9s

Curriculum Tags: Gr7, Gr8, MTH1W

https://twitter.com/howie_hua/status/1498446301117104132

I *think* I created a new puzzle?

(a) Find expressions that equal 1 through 10 w/out moving anything. Each expression needs at least 2 numbers in it.
(b) Create an expression where you can find expressions equal to 1 through 10 in it. What's the least number of numbers needed? pic.twitter.com/j3mdcs8UFj

— Howie Hua (@howie_hua) February 28, 2022

Fibonacci and Nachos, of course

Curriculum Tags: All
https://twitter.com/pickover/status/1498078357618970625

This humor involves mathematics and food. https://t.co/l5DsafClWr pic.twitter.com/1FfLxbVsEp

— Cliff Pickover (@pickover) February 27, 2022

And perhaps where this came from
Curriculum Tags: All
https://twitter.com/dpscher/status/1500503390685745158

I suspect this joke began here. pic.twitter.com/lqG1FrAgzv

— Daniel Scher (@dpscher) March 6, 2022

   

Math Links for Week Ending Jul. 9th, 2021

Featured Links 

Somehow I missed the beginning of #MathPhoto21. We are now in week 5 but you can see (and post about) the themes that have already come. One theme a week for 10 weeks. 
Curriculum Tags: All
https://twitter.com/hashtag/MathPhoto21?src=hashtag_click&f=live

It's time to kick off #MathPhoto21! During week 1, look for seven to celebrate the seventh year of the math photo challenge. Where do you see seven as a shape, quantity or numeral? Take photos and post to Twitter using the hashtags #MathPhoto21 and #seven. #MTBoS #ITeachMath pic.twitter.com/Fq66WSdoop

— Erick Lee HRCE Math (@TheErickLee) June 10, 2021

Week 2 of #MathPhoto21 is here! This week look for balance and #symmetry. Take photos and post to twitter using both #MathPhoto21 and #symmetry. #symmetrychat #MTBoS #iteachmath pic.twitter.com/h9uyckYu2k

— JoAnn Sandford HRCE Math (@joann_sandford) June 17, 2021

Check out this this week’s (Week 3) #MathPhoto21 challenge #circles take photos and post to twitter using both #MathPhoto21 and #circles #MTBoS #iteachmath #mathschat #MathsTalk pic.twitter.com/0BhGkqKGnf

— Cass Lowry (@cass_lowry) June 24, 2021

Check out this Week 4 of #MathPhoto21 challenge #lines.
Take photos and post to twitter using both #MathPhoto21 and #lines #MTBoS #iteachmath #mathschat #MathsTalk pic.twitter.com/dezLW40P9q

— Karen Campe (@KarenCampe) July 1, 2021

⏰for week 5️⃣ of #MathPhoto21! Where do you 👀#patterns? Take photos and share to 🐦using the hashtags #MathPhoto21 and #patterns. #MTBoS #ITeachMath #mathchat #visualmath pic.twitter.com/NPu3GhdJ6G

— Norma Gordon (@normabgordon) July 8, 2021

Resource Links 

If you've got Microbits in your class and you are doing some coding then you might want to try out this social distancing code
Curriculum Tags: Gr7, Gr8, MTH1W
http://brianaspinall.com/coding-a-microbit-social-distancing-app/

Coding A Micro:Bit Social Distancing App #CodeBreakerhttps://t.co/3012OPwdXV pic.twitter.com/a2gxBqGQjp

— Brian Aspinall (@mraspinall) July 3, 2021

A nice dynamic probability calculator
Curriculum Tags: MDM4U
https://twitter.com/geogebra/status/1412432802675576832

Statistics teachers:

📣 Our probability calculator now has a two-tailed option for all distributions! https://t.co/yQcFhdYC1W pic.twitter.com/5iQ1mor6sx

— GeoGebra (@geogebra) July 6, 2021

Some simple tweaks to help your direct instruction
Curriculum Tags: All
https://twitter.com/mpershan/status/1412547122608717825

Here are simple changes that would improve most direct instruction in math:

a) brief practice comes right after each example
b) write examples/problems before class
c) ask a "what if" for each example -- what if this was +3 instead of -3? what if you divide by 2 first? etc

— Michael Pershan (@mpershan) July 6, 2021

This is a pretty slick demo of multiplying and dividing by powers of 10
Curriculum Tags: Gr7, Gr8
https://twitter.com/jontheteacher/status/1412943852478947329

simple demonstration of multiplying and dividing by powers of ten (note static decimal point) in desmoshttps://t.co/C63iyPI2TW pic.twitter.com/kAi01vhoPv

— Jonathan Ashley (@jontheteacher) July 8, 2021

Audio/Video Links 

I've seen animations like this before but I like how this one shows it for four polynomials at once
Curriculum Tags: Gr8, MTH1W
https://twitter.com/SteveStuWill/status/1411435977336262657

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

Credit: @MagicPi2 https://t.co/H13V7wOPaN pic.twitter.com/7TVaJEB9Nx

— Steve Stewart-Williams (@SteveStuWill) July 3, 2021

I have seen this sort of visual proof of the Pythagorean Theorem before (ie with water) but I've always seen the same video that's been around for a while. This looks like a newer construction. 
Curriculum Tags: Gr8, MTH1W
https://twitter.com/FixingEducation/status/1412069367001620480

Visual Proof of The Pythagorean Theorem!
Please pass on to your favorite math and science teachers. #PythagoreanTheorem #Math #Sciencepic.twitter.com/77GO1uHnvv

— Fixing Education (@FixingEducation) July 5, 2021

This mechanical linkage for to determine the centroid of any triangle is cool. I made a Desmos version here (hint: a trisection is needed). And there is a proof here. 
Curriculum Tags: MTH1W
https://twitter.com/ChocoLinkage/status/1412431934123253760

mechanical linkage showing the centroid of triangle

三角形の重心がわかるリンク機構 pic.twitter.com/HAm3auHI3U

— 上木 敬士郎 / Keishiro Ueki (@ChocoLinkage) July 6, 2021

If you are teaching any math concept, there is better anchoring for students if there is a story associated with it. My guess is that if they hear this baseball related story on a recent episode of @PlanetMoney they will come away with a great anchor about compound interest. It's good for just introducing the topic or more complex calculations involving annuities and pension payouts. Here's the short version: Pro baseball player Bobbly Bonilla gets the last $6 million of his contract bought out in a way that after 10 years, he gets over a $1 million a year for 25 years.  
Curriculum Tags: Gr8, MCR3U
http://ontariomath.blogspot.com/p/podcasts.html



Why get a job in Statistics? Why not?
Curriculum Tags: MDM4U
https://www.youtube.com/watch?v=uss7MXcpHaQ

Why be a statistician? Here's what one #stats pro LOVES about her work: https://t.co/RWRbGEd3mi

— This is Statistics (@ThisisStats) July 8, 2021

Seriously, who wouldn't want to hear Tom Hiddleson read math equations? Except, as @Howie_Hua points out, when he misses a value of Pi.
Curriculum Tags: All
https://twitter.com/bradwhipple/status/1412490326246318080

Tom Hiddleston reading math equations to cleanse the timeline pic.twitter.com/Q0BVprNGYC

— Braddington (@bradwhipple) July 6, 2021

Image Links 
Here's a prompt for your statistics classes
Curriculum Tags: MDM4U
https://twitter.com/ddmeyer/status/1410331780033380353

Got a question for your stats exam next year -

👉 How are both of these media orgs using bad stats to convince you to hire more cops and put more people in cages? pic.twitter.com/hxk2bRSfSK

— Dan Meyer (@ddmeyer) June 30, 2021

"When will we ever need this in real life?" - here's your answer
Curriculum Tags: All
https://twitter.com/ONTSpecialNeeds/status/1413503037495185409

Math is so much more than numbers! pic.twitter.com/uwcozzwf0T

— ONTSpecialNeeds (@ONTSpecialNeeds) July 9, 2021

Math Links for Week Ending Jun. 4th, 2021

Featured Links

If you have not seen @NatBanting's #MenuMath activities, I strongly suggest you head over to his archive here. And if you have, then you will love that @PattyStephens has complied some Desmos versions in a collection. 
Curriculum Tags: All
https://teacher.desmos.com/collection/5f98fc1c334c5732255b6515

Love @NatBanting's #MathMenu tasks and have turned some into @Desmos activities and collected them here along with some by @mrchowmath and @davidpetro314 . If you have created a #Desmos #mathmenu task, please share! #iteachmath #MTBoS https://t.co/Jo2iIN4EYA

— Patty Stephens (@pattystephens) June 4, 2021

Resource Links

I like the idea of students translating algebraic expressions into sentences (We've created our own activities here and here). You would think, however, that by posting a bunch of expressions/equations around the room and have students write down sentences to represent them might not lead to much variance from students as they rotate through. But it turns out that might be wrong. Check out @MathEqualsLove's post to see:
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://mathequalslove.net/translating-algebra-around-the-room-activity/

Opinion Links

Helping students absorb various concepts in math class is can be achieved by making sure that multiple approaches are used. In this post, @MrValencia24 outlines reasons to use multiple approaches in the context of a quadratic inequality.
Curriculum Tags: MHF4U
https://blog.savvas.com/using-multiple-approaches-to-a-math-question/

Article Links

I definitely think that Euler's identity is beautiful but does @ProfKiethDevlin? 
Curriculum Tags: All
https://twitter.com/maanow/status/1400135610766090248

Is Euler's Identity truly beautiful? And if so, how? In the latest #MathValues, Keith Devlin (@profkeithdevlin) explores the layered beauty of mathematics through this identity. Check it out and share your thoughts with us: https://t.co/X0PZTesdzq #MathTwitter

— MAA (@maanow) June 2, 2021

Video Links

Who doesn't like a good debate about whether math was invented or discovered. In this case it's from Kira Miller via @TomRocksMaths
Curriculum Tags: All
https://tomrocksmaths.com/2021/05/05/is-maths-discovered-or-invented/

Who doesn't love a good 3D Seipinski's triangle
Curriculum Tag: All
https://twitter.com/MagicPi2/status/1399099548962799617

Sierpinski pyramid#mtbos #iteachmath #Math #Maths pic.twitter.com/0QRH1EZDqj

— Idan Tal (@MagicPi2) May 30, 2021

Image Links

Can't get enough of Geometric Art
Curriculum Tags: All
https://twitter.com/GeomeTribal/status/1398290092620398596

Roman mosaic from the 1st-2nd century found in Badalona. My favourite piece at the Archaeological Museum of Catalonia, in Barcelona pic.twitter.com/766ODwdle5

— Ancient Geometry (@GeomeTribal) May 28, 2021

You've probably heard of the Golden Ratio but have you heard of the Plastic Number?
Curriculum Tags: MCR3U, MHF4U
https://twitter.com/fermatslibrary/status/1397910210820427779

A way to define the Golden Ratio is the value of x for which the 3 vertices are collinear. The equivalent for rectangular boxes is called the Plastic Number named by the dutch monk Dom Hans van der Laan. pic.twitter.com/JJP7IFsQTs

— Fermat's Library (@fermatslibrary) May 27, 2021

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 Jan. 22nd, 2021

Featured Links

I like that @RobertKaplinski has compiled some of these "ideas that only seem obvious after we hear them." There are some good ideas here although I will say that I have said for years that I like to make sure I hear from everyone every day. See them all below:
Curriculum Tags: All
https://robertkaplinsky.com/postdictable-ideas-that-only-seem-obvious-after-we-hear-them/

Resource Links

Although I usually focus on resources for grades 7-12 but I really like this activity from @Kurt_Salsibury on remainder. 
Curriculum Tags: All
https://twitter.com/kurt_salisbury/status/1352384255477895170

Been having a little difficulty interpreting remainders at the homestead so I built this @desmos. Still needs some tweaks, but thought I would share. #iteachmath #mtbos #improvemyABhttps://t.co/hgx442GF9O pic.twitter.com/XUmBIwhEVm

— Kurt Salisbury (@kurt_salisbury) January 21, 2021

Video Links

Another nice sketch from @Ayliean. This time with octagons
Curriculum Tags:All
https://twitter.com/Ayliean/status/1350801401530773504

If it won’t tessellate then decorate!💃

A wee overlapping octagon based geometric jam 📐

🤓💗 pic.twitter.com/ONEHNloBWP

— Ayliean (@Ayliean) January 17, 2021

Although this video is long, you only have to watch the first bit to see the application of Pythagorean theorem in his planning to create this tiny piece on a lathe. 
Curriculum Tags: MPM1D, MFM1P
https://www.youtube.com/watch?v=mad99eyXpJE

Image Links

Now that we have coding throughout our Gr1-8 curriculum, having resources to help connect it to ideas for students is super important. In this case, it's dance. 
Curriculum Tags: Gr7A, Gr8A
https://twitter.com/GLewisOCT/status/1352771854256254977

#Coding in #OntEd #Curriculum2020 can be overwhelming, so we used the #Dance metaphor in our PD session to describe the progression from Gr1-8. Sample Task: have students code a routine activity or game (tying shoes, making sandwich, musical chairs). Thanks @rosemortillaro! pic.twitter.com/a6fi6EgnPr

— Gerard Lewis, OCT (@GLewisOCT) January 23, 2021

Don't be fooled by this graphic. In this analysis the representations are all interactive and customizable. Perfect for your students who like basketball
Curriculum Tags: MDM4U
https://projects.fivethirtyeight.com/nba-player-ratings/