Math Links for Week Ending Sept. 23rd, 2022

Featured Links

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 Sept 16th, 2022

Featured Links

Are you looking for your next good read? You might want to consider @MathGeek76's book "The Imperfect and Unfinished Math Teacher". To get a glimpse of what you'll find there, you might first try his video series. As of right now, he's on episode 7 (below) but you can check them all out on his blog too. 
Curriculum Tags: All
https://undercovercalculus.com/blog/

I&U E7: How to Become a Happier Math Teacher from chase orton on Vimeo.

Resource Links

I'm glad that @JennaLaib continues to add to her Slow Reveal Graphs site. You should be too. You can probably find one (or several) that will fit any of your data management lessons. Check the latest (and the rest) out here:
Curriculum Tags: Gr7, Gr8, MBF3C, MAP4C, MDM4U
https://slowrevealgraphs.com/

Video Links

Some prompts in a couple of lessons on introducing exponential relationships. Lot's of good prompts and descriptions of those prompts on the Math is Visual pages. and maybe some more ideas on a full five day lesson on the Make Math Moments page (though you have to join to get it all) 
Curriculum Tags: MTH1W, MCF3M, MCR3U, MAP4C
https://mathisvisual.com/more-exponential-growth-patterns/
https://mathisvisual.com/visualizing-powers-exponential-growth/
https://learn.makemathmoments.com/task/invasive-species/

Image Links

We don't do a lot of Venn diagrams in Ontario curriculum anymore but you still might want to throw one up and ask students to explain it. And if you are doing that anyway, then why not make it more interesting by doing one from Indexed. 
Curriculum Tags: All

Math Links for Week Ending Sept 9th, 2022

Featured Links

I think @MaryBourassa always reminds that things don't have to be big elaborate productions in order to give your kids an opportunity to think. I am glad she 
Curriculum Tags: MTH1W
https://twitter.com/MaryBourassa/status/1567499322454904832

Day 2... Create 5 expressions that simplify to 1.

Did I forget to mention that I'd like you to be creative?

Oh, each expression must contain at least 4 terms.

Oh, also you need variables.

And fractions.

Really great conversations ensued!

— Mary Bourassa (@MaryBourassa) September 7, 2022

I also like this prompt described by @RealJ_Mitchell. Like many good prompts like this, it starts out seemingly simple but has hidden complexity in it. 
Curriculum Tags: All

https://twitter.com/realJ_Mitchell/status/1567665518634467328

First full length classes today. #ThinkingClassroom says to start with non-curricular tasks.
So here is a thread about what I did with my Calculus and Vectors students. #OntEd

— Jamie Mitchell (@realJ_Mitchell) September 8, 2022

Resource Links

Do you want your kids to practice "multiplication tables"? This site is a pretty cool and fun way to do it.
Curriculum Tags: All
https://mathigon.org/multiply

Students worldwide have answered over 70 million questions on Multiplication by Heart! Made in partnership with Dan Finkel @mathforlove; these cards use the technique of spaced repetition to help students learn multiplication facts. Learn more at https://t.co/YDzrvyO51E. pic.twitter.com/vjtKUGW79Q

— Mathigon (@MathigonOrg) September 6, 2022

If you are making your own @Desmos/Polypad mashups then you might like these tips
Curriculum Tags: All
https://twitter.com/TimBrzezinski/status/1565737430853922816
https://twitter.com/MathigonOrg/status/1565701289350238211

Now that any pre-made @MathigonOrg #Polypad can be pasted into @desmosclassroom activities, this now means we can also customize the side bar so it displays only the TOOLS we want students to see!

To do this, simply customize the #Mathigon Polypad ahead of time! Here's how.👇 pic.twitter.com/ihgOkIMjLy

— Tim Brzezinski (@TimBrzezinski) September 2, 2022

Big news! You can now import a saved Polypad from your Mathigon account into Activity Builder in @desmosclassroom.

Just copy the URL of the saved Polypad, click on the blank Polypad fullscreen component inside AB, and use CMD-V or CTRL-V to paste the URL. It's that easy! 📣🎉📣 pic.twitter.com/YgurIcmWdA

— Mathigon (@MathigonOrg) September 2, 2022

Video/Audio Links

We have started the 5th season of @OAMETalks and @Dr_Costello is the first guest. This podcast is the preview of the Sept 14th free webinar which is open to all. More info and links to register can be found at talks.oame.on.ca.
Curriculum Tags: All
https://talks.oame.on.ca/season-5

[New Podcast] This episode features @dr_costello previewing their Sept 14th webinar "Mathematizing Student Thinking: Broadening Our Perspective on Problem Solving". Registration is free for all. Check it out at:https://t.co/bJzj90sdCx#mathchat #MTBoS #iTeachMath pic.twitter.com/eLv18P6c9V

— OAMEtalks (@OAMEtalks) September 2, 2022

Every so often I forget that @AlexOverwijk is the circle drawing champ of the world. But the thing I didn't know was about the site that was mentioned in the comments about how you would actually measure how good of a circle drawer you are. And if you haven't seen his viral video, then go to the site just for that. 

Curriculum Tags: All
https://staff.math.su.se/hoehle/blog/2018/07/31/circle.html

Not one of these guys is fit to carry @alexoverwijk's chalk IMO. https://t.co/IsaE2Fx0en

— Dan Meyer (@ddmeyer) September 8, 2022

Image Links

We harvested our honey last weekend
Curriculum Tags: All
https://twitter.com/davidpetro314/status/1566143096408121347

A little late for #MathPhoto22 but we just harvested our honey and this empty frame shows #patterns #angles and #symmetry #MathChat #MTBoS #iTeachMath pic.twitter.com/dQCBthOHMd

— David Petro (@davidpetro314) September 3, 2022    

Math Links for Week Ending Sept. 3rd, 2022

Featured Links

This is pretty interesting. Having just read Building Thinking Classroom and in it they talked about how many questions teachers ask in any class. And although this post is not connected connected to thinking classrooms directly, it is pretty neat to see all these questions compiled from a single lesson into a 7 min video clip. 
Curriculum Tags: All
https://danmeyer.substack.com/p/every-teacher-question-from-a-single

Resource Links

I'm not the only one who makes summaries of good math things found. I have shared these posts from @mathsjem before and I will keep doing it. In this post, resources from perimeter to vectors and all things in between. 
Curriculum Tags: All
https://www.resourceaholic.com/2022/08/5-maths-gems-161.html

New! My 161st gems post. Ideas, resources and updates for maths teachers.https://t.co/NsQu3niR48

Hat tips to follow!#mathschat #teammaths #mathsgems pic.twitter.com/4V9vZV5wCa

— Jo Morgan (@mathsjem) August 29, 2022

Who doesn't want to read about applications of calculus
Curriculum Tags: MCV4U
https://ali.medium.com/the-beautiful-applications-of-calculus-in-real-life-81331dc1bc5a

Nice long read for the weekend!

The Beautiful Applications of Calculus in Real Lifehttps://t.co/8tHPHpMSoo

— Math Lady Hazel 🇦🇷 (@mathladyhazel) August 27, 2022

Video Links

Fun stuff with 3D geometric shapes and @Geogebra
Curriculum Tags: MTH1W
https://twitter.com/CamiloSua_/status/1564260169705574406

🧳 Un dodecaedro, listo para abordar 🛫

📲 Hecho en @GeoGebra, mientras esperaba mi vuelo 🤷🏻‍♂️ #GeoGebra #AprendiendoGeoGebra #GeoGebraBogota pic.twitter.com/95KkdtKYc7

— Camilo Sua (@CamiloSua_) August 29, 2022

If you want to be a machinist then you better know your geometry. Though there is not a lot a math shown here, you can definitely see glimpses of all the math needed to create this tiny gear. 

Curriculum Tags: MTH1W
https://www.youtube.com/watch?v=H4rEZ35wDTw

Image Links

I have always been partial to tessellations. And so here are resources from @MathigonOrg to help you when you are teaching tiling to your students.
Curriculum Tags: Gr7
https://mathigon.org/task/tessellations

Interested in exploring tessellations with your students? Our tessellation unit has 9 different lessons. Maybe do one a month and see how your students' understanding grows throughout the year. Be sure to share their creations with us! Learn more at https://t.co/2SCIy9ZyPN pic.twitter.com/NR8CGffQzc

— Mathigon (@MathigonOrg) August 29, 2022

Math Links for Week Ending Aug 26th, 2022

Featured Links

I like this story because it speaks to the idea of perseverance (of students) and understanding (of teachers) and also reminds me that as teachers we can have a huge influence on students and rarely ever know what we may do to cause that influence.
Curriculum Tags: All
https://www.theguardian.com/lifeandstyle/2022/aug/24/a-moment-that-changed-me-a-maths-puzzle-taught-me-to-use-my-brain-and-helped-me-cope-with-losing-my-daughter?CMP=Share_AndroidApp_Other

Peter Harrison. My friend, mentor in life and math, sent me this today. No article has better articulated what I believe about math education and even why I need to reduce my footprint here—I need to avoid seeing the purity of its humanity be trampled on.https://t.co/xTgKXnpBT2

— Sunil Singh (@Mathgarden) August 24, 202

Resource Links

If you are reading Building Thinking Classrooms then you might like this study guide
Curriculum Tags: All
https://buildingthinkingclassrooms.com/wp-content/uploads/2020/11/Book-Study-Guide.pdf

Here is free book study guide: https://t.co/pT9llZMh75 https://t.co/guex44oA3L

— Peter Liljedahl (@pgliljedahl) August 24, 2022

Video Links

Although these are "tricks" for sure, you can definitely use them to help students practice mental math or using formulas or order of operations or even working with patterns. 
Curriculum Tags: All
https://www.youtube.com/watch?v=UDQjn_-pDSs

Those conversations (about thinking) are the most important to have in math class. 
Curriculum Tags:All

https://twitter.com/howie_hua/status/1562594549221822464

New TikTok video: My first mathematical activity I do with students pic.twitter.com/qVuYqtoYJo

— Howie Hua (@howie_hua) August 25, 2022

Surely you can find some geometry connections to building the best paper airplane

Curriculum Tags: All
https://www.wired.com/story/learn-how-to-fold-a-world-record-setting-paper-airplane/

Here's how to make the paper airplane that set the world record for distance https://t.co/MqWKqh33Ce pic.twitter.com/zp8sZy0KWA

— Vala Afshar (@ValaAfshar) August 23, 2022

Image Links

I am a big fan of tiling and would love for my walls to look like this
Curriculum Tags: All
https://twitter.com/Gelada/status/1562125764476149761

My new tiling installation in Tulsa @tulsastem. It slowly reveals aspects of the Socolar tiling, from vertices to edges to 2d tiles (there are plans to go to 3d in Augmented Reality!). #poweredbyflightnight #mathart pic.twitter.com/MazqFRKd32

— Edmund Harriss (@Gelada) August 23, 2022

    

Math Links for Week Ending Aug 19th, 2022

Featured Links

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. 12th, 2022

Featured Links

I have mentioned this workshop series before but because it looks so useful and starts shortly, I thought I would give it a mention one more time
Curriculum Tags: All
https://twitter.com/TimBrzezinski/status/1556826759739359239

URLs to the @geogebra workshop with @EMasslich and @MathTechCoach have been created! Starts next MON AUG 15 at 9PM. Here are 4 places where you'll be able to access it live:https://t.co/GQ8rr41CYKhttps://t.co/PgvAbIC3Uwhttps://t.co/dLqHrbjyclhttps://t.co/tTxbSsIX6p https://t.co/R8GRkVnjoo

— Tim Brzezinski (@TimBrzezinski) August 9, 2022

Resource Links

This is really interesting. This is the idea that all the figures are poorly drawn so students have to use the other clues (congruent sides, angles etc) to determine, if they were drawn correctly, what type of shape this was. 
Curriculum Tags: Gr8, MTH1W
https://twitter.com/MathTechCoach/status/1557091978663411712

Hey #ITeachMath and #MathTwitter and #MTBoS
I created a Poorly Drawn Squars activity today. All of my poorly drawn things are in this @GeoGebra Book https://t.co/XEBYKxExZv pic.twitter.com/bPj8wyiXW2

— Steve Phelps (@MathTechCoach) August 9, 2022

We've been promoting the benefits of the "Thinking Classroom" for years here but it's always good to hear a new opinion.
Curriculum Tags: All
https://robertkaplinsky.com/you-must-read-building-thinking-classrooms-in-mathematics-by-peter-liljedahl/

I've been a math educator since 2003 and Building Thinking Classrooms in Mathematics by @pgliljedahl has more potential to improve the way we teach mathematics than any other book I have ever read.

I wrote a blog post to share why we should all read it:https://t.co/oWkYbmWvel pic.twitter.com/Kce9INaCUZ

— Robert Kaplinsky (@robertkaplinsky) August 9, 2022

Video Links

People have trouble with big numbers. Here are some visuals to help with billions and millions.
Curriculum Tags: All
https://twitter.com/howie_hua/status/1557517003711139842

New TikTok video: The difference between a million and a billion pic.twitter.com/huuACxpmeX

— Howie Hua (@howie_hua) August 10, 2022

This time Howie gives us some visuals on a few geometric series. 

Curriculum Tags: MCR3U
https://twitter.com/howie_hua/status/1557155857980264448

New TikTok video: Understanding these 3 geometric series through visuals pic.twitter.com/od1Mc7Day9

— Howie Hua (@howie_hua) August 10, 2022

Image Links

For the last week of #MathPhoto22, the challenge is to find images that combine as many of the previous themes. 
Curriculum Tags: All
https://twitter.com/AlisonHogben/status/1557633224783941632

It’s the final week of #MathsPhoto22 and I’m pleased to be hosting the #MathsMashUp. How many of the previous prompts can you include in one photo? The challenge begins! pic.twitter.com/RY7fOrH5Qk

— Alison Hogben (@AlisonHogben) August 11, 2022