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

I spent way too long making this lesson on climate change and exponential decay. So, hopefully someone out there can use it. #MaththatMatters #iteachmath #mathstoday #mtbos Slides: docs.google.com/presentation... Task: docs.google.com/document/d/1...

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— Bryan Meyer (@doingmath.bsky.social) March 25, 2025 at 4:00 PM

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

Graphing quadratics in vertex form #mathsky

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— scaffoldedmath.bsky.social (@scaffoldedmath.bsky.social) March 26, 2025 at 11:46 AM

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

@jennalaib.bsky.social HERE IS THE COMIC I WAS THINKING OF!!! #iTeachMath

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— Karen Campe (@karencampe.bsky.social) March 24, 2025 at 10:48 PM

A perfect math starter
Curriculum Tags: All

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

#RecreationalMath #iTeachMath #MathSky

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— Duane Habecker (@duanehabecker.com) March 22, 2025 at 5:35 PM

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

It's time for your #TapeDiagramTuesday extra challenge! Model your solution strategy with a tape diagram. Then share it with the community! #iTeachMath

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— Duane Habecker (@duanehabecker.com) March 25, 2025 at 8:05 AM

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 Feb 14, 2025

Featured Links

I never miss a chance to share @SaraVanDerWerf's stuff. This may be too late for this year but put it in your back pocket for next year. 
Curriculum Tags: All
https://www.saravanderwerf.com/nerding-out-on-resources-for-valentines-day/

Resource Links

Some Valentines activities for exponential functions
Curriculum Tags: MCR3U, MAP4C, MHF4U, MCT4C
https://karendcampe.wordpress.com/2022/02/10/i-%e2%9d%a4%ef%b8%8f-candy-math/

Take advantage of valentines candy to explore exponential models with your students! Check out "I ❤️ Candy Math" for Valentine's Day this week! #MTBoS #iTeachMath #MathSky #MathsToday karendcampe.wordpress.com/2022/02/10/i...

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— Karen Campe (@karencampe.bsky.social) February 8, 2025 at 9:20 AM

Some resources for teaching logs
Curriculum Tags: MHF4U
https://timcorica.substack.com/p/logarithms-some-teaching-ideas

#iTeachMath #MathsToday Someone posted a request for ideas for livening up a unit on logarithms, so I did a brain dump of 45 years of teaching, and posted it on my substack: open.substack.com/pub/timcoric...

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— Tim Corica (@tcorica.bsky.social) February 9, 2025 at 10:34 AM

A nice real world problem dealing with the value of a penny.

Curriculum Tags: MTH1W
https://www.citizenmath.com/lessons/common-cents

Should we nix the penny? 💰 #EduSky 🍎: Will you comment ideas and resources to explore this question as a class -- or on your own! -- so we can create one BIG thread 🧵 on this #RealWorldMath? 🌍 We'll go first. You add on and repost...👇 #MathSky #ITeachMath #PBL www.citizenmath.com/lessons/comm...

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— Citizen Math (@citizenmath.bsky.social) February 10, 2025 at 2:50 PM

Video/Audio Links

The latest preview of #OAME2025
Curriculum Tags: All
https://talks.oame.on.ca/season-7

[New Podcast] It's the @OAMEcounts #OAME2025 Day 2 preview. Featuring @TheMathGuru @joboaler @NatBanting. Listen here:https://t.co/95KyY9ZtpW

Check out all the conference info at https://t.co/PCaIcus9Zd #MathChat #MTBoS #iTeachMath pic.twitter.com/YT8NtOI6mE

— OAMEtalks (@OAMEtalks) February 9, 2025

Here's your Desmos Valentines eCard
Curriculum Tags: All
https://www.desmos.com/calculator/yhaz5chjsr

Made with love (and equations). 💕 💌 Explore the graph, and personalize your own to share: www.desmos.com/calculator/y... #mathsky #iteachmath

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— Desmos Studio (@desmos.com) February 13, 2025 at 9:14 AM

Image Links

This is a fun factorial question. I don't think you can do it algebraically, you have to use some logic and knowledge of factorials 
Curriculum Tags: MDM4U
https://x.com/antonillos/status/1888505163800887542

solve for d. how fast can you find it❓ #math #challenge pic.twitter.com/bTqhcsdsOq

— Antonio Saco (@antonillos) February 9, 2025

Perfect when you are talking about order of operations
Curriculum Tags: Gr8, MTH1W

https://bsky.app/profile/natbanting.bsky.social/post/3li3lhddgz22g

These make me smirk every time. (Side quest: if someone answers “48,” what led them to that conviction?)

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— Nat Banting (@natbanting.bsky.social) February 13, 2025 at 4:00 PM

Math Links for week Ending Dec. 13th, 2024

Featured Links

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

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

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

Resource Links

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

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

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

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

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

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

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

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

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

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

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

— Sarah Carter (@mathequalslove) December 8, 2024

Video Links

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

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

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

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

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

— Howie Hua (@howie_hua) December 12, 2024

Image Links

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

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

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

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

I Wrote a Poem about exponential growth...

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

Math Links for Week Ending Jan. 8th, 2021

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I really like this visualization from @MonaChalabi. It really shows the power of exponential growth and the idea that even though this new strain of C19 is no deadlier than the main version, the fact that it is much more contagious makes it effectively more dangerous. Some good math here dealing with percents and powers here. Make sure you look in the comments for the description of the math.
Curriculum tags: MCR3U, MCF3M, MBF3C, MAP4C, MCT4C
https://twitter.com/MonaChalabi/status/1346513672722665474

This was such a great thread about the new Covid strain. I turned it into some illustrations for people who are visual learners. https://t.co/xEuMt5CRNd pic.twitter.com/4lyAq4ko0M

— Mona Chalabi (@MonaChalabi) January 5, 2021

Resource Links

I really love this visualization on how people from around the world use their time. It could be a great "What do you notice? What do you Wonder" exercise and there is quite a lot of background info in the article. And to be honest, Our World in Data is a great website, in general.
Curriculum Tags: Gr7, Gr8, MDM4U
https://ourworldindata.org/time-use-living-conditions 

I still really like these #SlowRevealGraphs. Here's one of the more recent ones. This one dealing with the movie industry. If you don't know what the premiss is, the idea is you take a graph and then remove most of the info and they slowly reveal it piece by piece. They have done the work for you with Google Slides on this site thanks to @jennalaib
Curriculum Tags: Gr7, Gr8, MDM4U
https://slowrevealgraphs.com/2021/01/04/rapid-decline-in-2020-box-office-profits-will-the-industry-recover-in-2021/

Article Links

The mathematicians that we've lost this year. Thanks to David Zimmer for pointing this one out. 
Curriculum Tags: All
https://www.newyorker.com/culture/annals-of-inquiry/three-mathematicians-we-lost-in-2020

Video Links

A few people have re shared this video tutorial I made about how to create a "Guess Who" game using the @Desmos Polygraph app. This video shows how you can use it to make a game for any subject, not just math. On the link there is more info from the blogpost I did as a companion.
Curriculum Tags: All
http://wecdsbit.blogspot.com/2019/02/creating-digital-guess-who-game.html

Image Links

An homage to those classic math problems
Curriculum Tags: All
https://twitter.com/Wakil_Sayb/status/1342139548894113792

Finally found the Guy from Maths book who used to buy 107 Bananas for no reasons pic.twitter.com/RJy7kTJzSl

— Haseeb Awan (@Wakil_Sayb) December 24, 2020

     

Math Links for Week Ending Apr. 10th, 2020

Featured Links
There seems to be a lot of stress about how to assess students in these online times. With kids already being stressed about school work I'm not sure if stressing them about assessment is helping. However, we still have to figure out a way to do it. Well @JRuelbach has been the @Desmos spokesmodel for assessment for years and she's got some ideas for you whether it's this new Tweet about using the comment feature while allowing students to annotate their own work or her one hour Desmos session on assessment in general.
Curriculum Tags: All
https://twitter.com/jreulbach/status/1248357641300185088
https://www.youtube.com/watch?v=59NnV6GBCG8&feature=youtu.be

Students can submit written work to your @Desmos AB, and then sketch on it!! Then, you can write feedback to them.

I have been STRUGGLING with how long feedback was taking me on PowerSchool and Google Drive.

Students Submit Written Workhttps://t.co/rCbwUk44Iz pic.twitter.com/TxELDjmaP9

— Julie (@jreulbach) April 9, 2020

Resource Links
I love this "story" that @JoelBezaire created about why Root 2 is an irrational number. It's ultimately a walk through but he keeps it light and entertaining. You should take a look at this, if only to see all the work he did getting the memes into it.
Curriculum Tags: All
https://twitter.com/joelbezaire/status/1247978769467559938

Definitely stretching the purpose/usefulness of a @Desmos AB with this format. And it's DEFINITELY TBD how this lands on my P-A students.

But if you're interested in the teacher-facing side of this activity, here ya go: https://t.co/KlZq3ImKKO

— joelbezaire (@joelbezaire) April 8, 2020

Another new Feature on Desmos is one that we've been asking for for a while. That is, the ability to do some sharing between teachers. In this case, it's the ability to share dashboards between teachers. I think, given all this online learning, this would allow teachers to team teach during an online session.
Curriculum Tags: All
https://twitter.com/Desmos/status/1246176600955076608

📣 NEW FEATURE FRIDAY 📣

Ever since schools started closing you’ve been asking us for this one …

👫 Add co-teachers to your account!https://t.co/Luc44W4dlA pic.twitter.com/11fMxbKLFg

— Desmos.com (@Desmos) April 3, 2020

Finding good resources for working with vectors is sometimes tough. In this activity @Christophe_Sew give's students lot's of self checking practice with vector equations.
Curriculum Tags: MCV4U
https://twitter.com/Christophe_Sew/status/1248041497846579202

Check my first Self-Checking @Desmos activity: Vector Equation of a Line! https://t.co/wUKI5BhklP

Spent the last few days studying CL from @mrchowmath then put into to practice while stealing code from @jreulbach, @davidpetro314, @JennSWhite

— Mr. S (@Christophe_Sew) April 9, 2020

Could the stairway in this house be exponential? Take out your favourite modelling software and find out.
Curriculum Tags: MCR3U, MCF3M, MCT4C
https://twitter.com/davidpetro314/status/1246877936373747712

There is definitely an exponential modelling question buried in this "Stairway House" (or is there?) Finally something about exponentials that isn't about Covid-19https://t.co/zJSuK1tJ9f#MTBoS #iTeachMath #Mathchat pic.twitter.com/n6GIO3cQLd

— David Petro (@davidpetro314) April 5, 2020

Opinion Links
Sometimes knowing math isn't enough to talk the math of our current situation.
Curriculum Tags: All
https://twitter.com/ddmeyer/status/1247364831943917568

🍭 NEW POST 🍭

Math Has Prepared Me Poorly for This Pandemic

Is the same true for you? #iteachmath https://t.co/rkIR8ZBR12

— Dan Meyer (@ddmeyer) April 7, 2020

Video Links
Now that we are all online, you may want an easy way to show students math work in real time and specifically where you are almost like you are working on the same whiteboard together as if you are in class. To do this you can use a Google app like Jamboard and here's how
Curriculum Tags: All
https://www.youtube.com/watch?v=Rby3358N5f4

Who doesn't like a nice Fibonacci fractal image done live
Curriculum Tags: All
https://twitter.com/Ayliean/status/1247487373962817536

I found something cool last night!

✨🌻The Fibonacci Word Fractal🌻✨

And from now on when people say “the F-word” I’m gonna assume this is what they’re talking about.

Here I’ve used an array of 8 squares iterated 5 times to generate the 23rd iteration of the F-word fractal 😍 pic.twitter.com/Oq2yaghoT6

— Ayliean (@Ayliean) April 7, 2020

Image Links
@DonFraser9 has a few more puzzles for you
Curriculum Tags: All
https://twitter.com/DonFraser9/status/1246915553014566918
https://twitter.com/DonFraser9/status/1246837320873107456

OK OK ...Hang on for a minute ! Yes..Here is a fifth trick ... #MTBoS #iteachmath ⁦@paul_math⁩ ⁦@Mathgarden⁩ ⁦@MatthewOldridge⁩ ⁦@davidpetro314⁩ ⁦@CathyMarksKrpan⁩ ⁦@MathletePearce⁩ ⁦@MrOrr_geek⁩ ⁦@MaryBourassa⁩ ⁦@DrMaryReid⁩ pic.twitter.com/1YZw9bo8yI

— Don Fraser (@DonFraser9) April 5, 2020

Alright ! You asked for it .....the 4th trick! #MTBoS #iteachmath ⁦@Mathgarden⁩ ⁦@CathyMarksKrpan⁩ ⁦@paul_math⁩ ⁦@MatthewOldridge⁩ ⁦@DrMaryReid⁩ ⁦@MaryBourassa⁩ ⁦@MathletePearce⁩ ⁦@davidpetro314⁩ ⁦@MrsBedfordclass⁩ ⁦ pic.twitter.com/ACJyhBXUbR

— Don Fraser (@DonFraser9) April 5, 2020

A little bit of Pythagorean Theorem, a little bit of area and a little bit of solving simultaneous equations
Curriculum Tags: MPM2D
https://twitter.com/Cshearer41/status/1246713032560033793

All three of these rectangles have the same area. What is it? pic.twitter.com/RKmetTH9lQ

— Catriona Shearer (@Cshearer41) April 5, 2020

Math Links for Week Ending Mar. 20th, 2020

Featured Links
There are more hits due to Corona. This time it's the OAME conference in May. We had a length discussion at OAME headquarters and given the current conditions we felt that it was best to get ahead of this and let people know. 
Curriculum Tags: All
https://twitter.com/OAMElearns/status/1239546928184078338

It is with deep regret that the organizing committee for OAME 2020, in consultation with the OAME Executive Committee, must announce the cancellation of OAME 2020: In Focus that was to take place May 7-8, 2020.
Please go to our website for more details:https://t.co/PLty0r20PF pic.twitter.com/re6zA1FTcD

— OAMElearns (@OAMElearns) March 16, 2020

Resource Links
Yup Conona keeps on going and I love that in this trying time, there are teachers who are doin analysis of their own. This is Ontario Math Links and @realJ_Mitchell has been keeping track of the numbers for Ontario. Check out this thread where he is making predictions and posts his @Desmos file. So if you are doing any sort of exponential stuff with your kids (either online or when we get back), you might want to work with this
Curriculum Tags: MCR3U, MHF4U, MCT4C
https://twitter.com/realJ_Mitchell/status/1241740759637929986

March 22, 57 days since the first #COVIDー19 case in Ontario.
424 total cases in Ontario today, which was under my prediction.
Tomorrow, 485 to 522 cases. Wide spread, suggesting my models are diverging (a good thing if we are truly slowing down). #MTBoS #OntEd #OnPoli https://t.co/sUUkgXJnoV pic.twitter.com/iZCgQf4Mgp

— Jamie Mitchell (@realJ_Mitchell) March 22, 2020

Here is a pretty cool simulator for how outbreaks spread. It's full of scenarios that start from the simple and move to the complex with sliders that you can play with. Have fun.
Curriculum Tags: MHF4U, MDM4U
https://twitter.com/davidpetro314/status/1240298827095080962

Here’s a neat set of simulations to model infectious disease spread from @KevinSimler https://t.co/qQAp4w2gKH#mathchat #MTBoS #iTeachMath #statschat

— David Petro (@davidpetro314) March 18, 2020

New from @Desmos just in time for the influx of online learning is a set of activity screens that are premade and easily copiable.
Curriculum Tags: All
https://twitter.com/Desmos/status/1240398489877651457

Project from our Distance Learning Task Force, intended to make activities that involve wellness checks for your students. Credit to @ddmeyer @jenny_wales @zmill415 @MsHelft @_faithmoynihan. Email coronavirus@desmos.com if you have questions or ideas on how we can support you. https://t.co/nCEpOK1upf

— Eli Luberoff (@eluberoff) March 18, 2020

And if you have ever used SolveMe Mobiles then you might like this new activity as a intro to systems of equations.
Curriculum Tags: MPM2D, MFM2P
https://teacher.desmos.com/activitybuilder/custom/5e7272e64e91f10c4dd87821


Video/Audio Links
Some Pi Day videos starting with @standupmaths calculating Pi by hand the old fashioned way
Curriculum Tags: All
https://youtu.be/CKl1B8y4qXw

And of course @ViHartViHart has her Pi day rant, this time as a mashup with the Corona Virus.
Curriculum Tags: All
https://www.youtube.com/watch?v=Y4Lc5-6L1pE

Another one from @3Blue1Brown on probability strategies and the binomial theorem. I particularly like the initial context of Amazon ratings.
Curriculum Tags: MDM4U
https://www.youtube.com/watch?v=8idr1WZ1A7Q

If you haven't checked out @StevenStrogatz new podcast, The Joy of X, I think you are missing out. On it, he interviews working scientists and mathematicians and I really like the insights he reveals about what they actually do. Check it out on your favourite podcasting platform.
Curriculum Tags: All

https://www.stitcher.com/podcast/the-joy-of-x

https://podcasts.apple.com/us/podcast/the-joy-of-x/id1495067186




Some interesting math to reverse engineer the Covid-19 numbers coming out of Iran to give something that may be more realistic.
Curriculum Tags: All
https://www.bbc.co.uk/programmes/p086krm0

Image Links
I have been seeing a lot of people posting images of various designs made with pattern blocks. You can have any of your kids (students or children) create their own patterns virtually using the awesome @OnMathies pattern blocks app to do so.
Curriculum Tags: All
https://mathies.ca/learningTools.php#Pp0

Math Links for Week Ending Oct 4th, 2019

Featured Links

In the latest episode of @Freakonomics Radio, they take on Math Education in America. They are not looking at the methods of teaching, however. They are looking at what is actually being taught and "spoiler altert" their data shows we should dump calculus and focus on data literacy. I definitely agree. Don't get me wrong, I love teaching calculus but very few people actually need it. There were a couple of bits that I liked, one was about the difference between what college professors wanted from students compared to what high school teachers thought they needed for college and how different those things were and the other was the survey results on who used which parts of math.

Curriculum Tags: All
http://freakonomics.com/podcast/math-curriculum/

Resource Links
Though in Ontario, there is no math course that teaches scientific notation directly, it is taught in the science courses. Here is a quick little @Desmos activity to help with that process. There are some nice animations and sorts to help students represent large and small numbers.
Curriculum Tags: All
https://blog.desmos.com/articles/new-scientific-notation-activity/


Here is a short and sweet dynamic tool to use when teaching the unit circle.
Curriculum Tags: MCR3U, MCF3M, MHF4U
https://twitter.com/von_Oy/status/1179509317629829121

Just something small here. A @Desmos unit circle for all those of you who are teaching trig this year.

And yes...the point *is* draggable around the circle.https://t.co/1smXYDDLyz pic.twitter.com/lCNjnlFWcg

— Suzanne von Oy (@von_Oy) October 2, 2019

For those of you who like to create your own @Desmos activities, they have just added the ability for students to upload photos into graphs while in Activity Builder.
Curriculum Tags: All
https://twitter.com/Desmos/status/1178718901351469056

New feature alert –

– students can now upload images in graphs in activities –

💣🤯🧹

All of you folks who assign graph art projects ... this is what you've been asking for.

— Desmos.com (@Desmos) September 30, 2019

Video Links
I love these videos of this YouTuber who does tool and mold making videos. So much practical geometry to show kids that there are applications to a lot of the stuff we do. In the first video he walks through the method to determine the centre of radius for a complicated shape but my favourite part was adjustable parallel tool (at about 8 min in) that he used in the second video where he is actually marking a cylinder in order to cut it into a hexagonal prism. The video is about how you could do such a thing if you didn't have a special "indexing" tool to do so.
Curriculum Tags: MCR3U, MBF3C, MCF3M, MCT4C, MAP4C
https://www.youtube.com/watch?v=ro1I03ktSa4
https://www.youtube.com/watch?v=_qYdcolOhGQ

It's cool to see all the math that goes into this Desmos graph to make the "caterpillar" springy. Great for any class dealing with complex functions to look at
Curriculum Tags: MCR3U, MHF4U
https://twitter.com/SumDumThum/status/1178917272733155329

Made an adorable stretchy caterpillar today: https://t.co/hsEhMLWmme pic.twitter.com/qLa21YK8ep

— Andrew Osborne (@SumDumThum) October 1, 2019

Image Links
I love that Canada is number one here. What questions come to mind with this infographic
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U
https://twitter.com/joe_sisco/status/1180199831421235205

Nice graphic. @davidpetro314 @MathletePearce pic.twitter.com/mDEIxyXMNE

— Joe Sisco (@joe_sisco) October 4, 2019

Math Links for Week Ending Nov. 23rd, 2018

This week I was asked to do a day of math activities for grade 7&8 students in a school. I wanted to do activities that had definite mathematical connections but were also fun and engaging. as it turned out all I had to do was look to @DavidButlerUoA's site. He often runs these sessions called 100 Factorial and these seemed like just the kind of thing to do with these students. We did Body Scale Prime Climb (thanks to @MathforLove), Panda Squares and Quarter the Cross. But you should check out all of his 100 Factorial ideas at the link below.You (and your students) won't be disappointed.
Curriculum Tags: All
https://blogs.adelaide.edu.au/maths-learning/category/one-hundred-factorial/

Thanks to @DavidKButlerUoA I did a #100factorial session with @stjwecdsb gr7&8 stds using Panda Squares, Quarter the Cross and Body Scale #PrimeClimb (thx @MathforLove ) https://t.co/dFlueGIW4Q #mathchat #mtbos #iteachmath pic.twitter.com/V2s4x2mMD9

— David Petro (@davidpetro314) November 20, 2018

While I was looking for activities with my grade 7&8 students I came across this nice set of activities from @nomad_penguin on classifying quadrilaterals. From simple classifying to sorting to playing guess who (and other stuff). Have fun.
Curriculum Tags: Gr7, Gr8
 https://amiealbrecht.com/2017/10/03/a-lesson-plan-for-quadrilaterals/






I created this activity for exploring the nature of the ambiguous case for sine law. It uses some of the Desmos geometry tools but also in the end, it also uses Challenge Creator where students create their own challenges for the rest of their classmates. This is a really good activity to have students practice the sine law.
Curriculum Tags: MCR3U, MCT4C
http://engaging-math.blogspot.com/p/desmos-activities_10.html




When I was fiddling around with solutions to Quarter the Cross, I created this dynamic sketch dealing with the area of triangles. When I first looked at it, I was surprised at how the areas stayed similar. It took me a little thinking to figure out why this happens. You can play around with the dynamic sketch at the link below.
Curriculum Tags: Gr7, Gr8
https://www.desmos.com/geometry/kuwxwcvcbg







Here's a relatively simple intro to similar triangles from @marybourassa. The thing I like about this is that it connects similar triangles to Pythagorean theorem to trig ratios. It's not that long but would be a good addition to any class doing spiralling.
Curriculum Tags: MPM2D, MFM2P
http://marybourassa.blogspot.com/2018/11/similar-triangles-introduction.html

This week we had the Ontario government had a virtual town hall on the current state of education. And @msbjacobs was there to live Tweet it. Its pretty interesting and I'm glad that he did it. Follow the whole set of Tweets here by clicking through on the link.
Curriculum Tags:All
https://twitter.com/msbjacobs/status/1065417401062187008

About to start the telephone Town Hall meeting for Education in Ontario. Will try to live tweet.

— Michael Jacobs (@msbjacobs) November 22, 2018

Are you interested in learning how to make dynamic constructions? Using Desmos Geometry, I started creating this one minute videos to show how to do some simple constructions. One of them is below but click on the link to see them all.
Curriculum Tags: All
http://engaging-math.blogspot.com/p/desmos-geometry-videos.html

Here's a cool property: Square any prime number and the answer is 1 more than a multiple of 24. So you could easily connect this to any sort of calculation practice but even better, if you are doing anything with expanding binomials, this might be an interesting context to work in that area.
Curriculum Tags: Gr7, Gr8, MPM2D, MFM2P
https://www.youtube.com/watch?v=ZMkIiFs35HQ

I wanted to show a few more of the Quarter the Cross solutions that we saw this week.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://twitter.com/davidpetro314/status/1064969713208446978

Some other good ones pic.twitter.com/VgZdpNKSND

— David Petro (@davidpetro314) November 20, 2018

Math Links for Week Ending Nov. 16th, 2018

So if you are like me, you consider yourself a "Sketchhead". That is, someone who builds in Geometer's Sketchpad. GSP has fallen by the wayside more recently but an online beta-test version of GSP has just been released for public consumption. You can use most of the constructions tools that you are used to having and the ability to upload and download the new GSP files (.json). You can create GSP files with custom tool sets and make them available for student use. There is also a way to upload multiple student files to one page for viewing. Thanks to @dpscher for pointing this out. Daniel says that more features and improved functionality are on the roadmap for Web Sketchpad.
Curriculum Tags: All
http://geometricfunctions.org/fc/tools/

This new activity from @desmos combines some of the best pedagogical and technological features they have. I think most of us can agree that kids love marbleslides. This new activity for linear relations is like marbleslides but instead of collecting stars with the marbles, they are collecting coins. And one of the things that, I think, make it better than marbleslides is that when typing an equation in marbleslides, your equation starts to graph as soon as you type it. So you can see mistakes happening on the fly. This makes it a bit easier to guess without knowing the math. Here you have to type the equation and submit it before you see it and it keeps track of the number of trials you use. Ending the activity off is a Challenge Creator so kids can create their own challenge to share with the rest of the class. Check it out.
Curriculum Tags: MPM1D, MFM2P
https://teacher.desmos.com/activitybuilder/custom/5bcdf906c1d7660b58d8b866

I had a friend of mine do a guest post on my Found Data blog. In it @virgonomic takes some data from t-shirt sales and designs from Notre Dame and collects it for analysis. It's definitely a "dirty" set of data but mostly linear and good for doing some interesting interpolating.
Curriculum Tags: MDM4U
https://found-data.blogspot.com/2018/11/notre-dame-university-shirt.html

I have finally gotten around to creating a Desmos activity using Challenge Creator. in this case it's for students to practice the sine law while also investigating the ambiguous case. Students first investigate and then do the practice.
Curriculum Tags: MCR3U, MCT4C
https://teacher.desmos.com/activitybuilder/custom/5beceb2ea437fd5fb1ae49d0




In this post, @mathletepearce does a good job of taking a task and showing how it could be done to different depths from grade 1 all the way to grade 7. He goes in detail on the proportional reasoning and gives us examples of student work and thinking along the way.
Curriculum Tags: Gr7
https://tapintoteenminds.com/proportional-relationships-developmentally/

A neat little 3Act task from @MrOrr_Geek dealing with least common multiples. What do you notice and wonder after this first task? Follow the link for the entire task.
Curriculum Tags: Gr7, Gr8
https://mrorr-isageek.com/hour-glass-multiples/

I have mentioned @MonaChalabi before. She is the data scientist at the Guardian and does some interesting visualizations of data. Here's a series on the participation of people of colour in outdoor sports. 

Curriculum Tags: MDM4U

https://www.instagram.com/p/BqKrV4gnVcM/?utm_source=ig_web_button_share_sheet

View this post on Instagram

My family have always thought sports are pointless and outdoor sports are just plain weird. So these numbers surprised me: on average, people of color are 8% more likely than white people to have participated in outdoor sports in the past year. The data comes from Canada and I showed the breakdown here for cycling, hiking, snowsports and climbing (each one in a different season!). Source: Environics survey for MEC Outdoors, 2018 #datasketch #outdoorsports

A post shared by Mona Chalabi (@monachalabi) on Nov 14, 2018 at 8:05am PST