Math Links for Week Ending Nov 26th, 2021

Featured Links

MoMath is offering a series of "Meet a Mathematician" online  webinars. Although these are not free events, the price is minimal (and you can choose to make a donation to a needy family as well) and you get to hear about what it's like to be a mathematician to boot. Sign up here:
Curriculum Tags: All
https://momath.org/meet-a-mathematician/

Ever wonder what a mathematician does for fun?

Find out by joining host @stevenstrogatz and special guest @emilyriehl, Professor in the Department of Mathematics at Johns Hopkins University TODAY for MoMath's Meet a Mathematician.

Register at https://t.co/9rSEUzQFf0 pic.twitter.com/JGhw1er5LT

— National Museum of Mathematics (@MoMath1) November 22, 2021

Resource Links

I'm a big fan of having students compare stuff as a vehicle to talk about math. In this post, @MrValencia24 uses "same but different" as a way to compare
Curriculum Tags:All
https://twitter.com/SavvasLearning/status/1461726508356091912

💡 "As a mathematics educator, I’m always looking for ways to engage my students and provide them with multiple entry points to the material they are learning." - Libardo Valencia blogs: https://t.co/BNDfNZPORU #iteachmath #MTBos #NCTM21 @MrValencia24

— Savvas Learning (@SavvasLearning) November 19, 2021

A couple of simple activities from Polypad. First some exploration with prime numbers:
Curriculum Tags: All
https://twitter.com/MathigonOrg/status/1462798173575987202

Adding prime numbers together contrasted with multiplying prime numbers together can help students discover the Fundamental Theorem of Arithmetic. Use Number Cards and Prime Factor Circles on Polypad to explore this idea. Try it for yourself at https://t.co/mx5Sane30U pic.twitter.com/jKyg6NF4d2

— Mathigon (@MathigonOrg) November 22, 2021

And @JoelBezaire shows how easy it is to quickly pull a lesson together using the balance scales. 
Curriculum Tags: Gr7, Gr8, MTH1W
https://twitter.com/joelbezaire/status/1462789465508823046

We have super short classes each day of this super short week, & I was struggling to find something worthwhile around the idea of "one step equations with integers".
Cranked this out on @MathigonOrg Polypad in about 15 minutes. Excited to see how it goes https://t.co/xwqc3XwnJm

— Joel Bezaire (@joelbezaire) November 22, 2021

Video Links

Is that your repetend under my vinculum? Though I would probably teach it differently now for what ever reason, I used to love teaching this. 
Curriculum Tags: MTH1W
https://twitter.com/howie_hua/status/1463314561063215113

New TikTok video: How do we convert repeating decimals to fractions? pic.twitter.com/BIRr3gCkfJ

— Howie Hua (@howie_hua) November 24, 2021

Image Links

Here's a fun prompt when dealing with rates of change:
Curriculum Tags: Gr7, Gr8, MTH1W
https://twitter.com/MathInTheNews/status/1462775223338471432

Alex Orchin is driving the world’s smallest car 870 miles across the UK to raise money for charity. The 3-wheeled Peel P50 has five-inch diameter tires.

How many times will the tires rotate during his journey? pic.twitter.com/hEXKmivvfl

— Math In The News (@MathInTheNews) November 22, 2021

Math Links for Week Ending Nov 19th, 2021

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If you haven't heard, @MathGarden has a new book out called Chasing Rabbits - A Curious Guide to a Lifetime of Mathematics Wellness. It has been receiving praise from all over the place on the InterWebs. Pick it up at your favourite book repository. In the meantime, here's and excerpt. 
Curriculum Tags: All
https://youtu.be/y1bF6_jUkIk

Resource Links

If you are doing any work with 3D vectors, then I think @Geogebra is your tool. 
Curriculum Tags: MCV4U
https://twitter.com/TimBrzezinski/status/1223034965140606977

#3D Vector Components: Dynamic & modifiable illustrator with key Q prompt for Ss: https://t.co/Zg5rRvRGGp. @geogebra #MTBoS #ITeachMath #math #maths #trig #trigonometry #precalculus #MathEd #HSMath #CollegeMath #LifeIs3D #WhyWorkOnlyIn2D? 🤔 pic.twitter.com/UoOd8s2R3f

— Tim Brzezinski (@TimBrzezinski) January 31, 2020

Keep the puzzles coming
Curriculum Tags: All
https://mathequalslove.net/make-30-puzzles/ 

One of my favorite puzzle creators, Erich Friedman, took it upon himself to create a new set of puzzles just for my students. How awesome is that?!?

These Make 30 Puzzles have been a big hit! Enjoy! https://t.co/hDY9dq6tai #mtbos #iteachmath #puzzlingclassroom pic.twitter.com/Pu9YzcOyDi

— Sarah Carter (@mathequalslove) November 18, 2021

Video/Audio Links

A regular polygon? Turns out that regardless of the number of sides, one formula rules them all (when it comes to area, at least)
Curriculum Tags: MTH1W
https://twitter.com/howie_hua/status/1458238058369732609

New TikTok video: Wouldn't it be great if all of these had the same area formulas? Good news, they do! pic.twitter.com/pKwPMVytKY

— Howie Hua (@howie_hua) November 10, 2021

A reminder that math is not just a bunch of unrelated stuff
Curriculum Tags: MCV4U
https://twitter.com/howie_hua/status/1461509204745723910

New TikTok video: Is it a coincidence that the derivative of the area formula of a circle is its circumference formula? pic.twitter.com/JBz2FxGy9M

— Howie Hua (@howie_hua) November 19, 2021

Such a great description and relatively simple construction to create such a complex set of circles by @Matthen2 in this @Numberphile video
Curriculum Tags: All

https://www.youtube.com/watch?v=hSsRcpIsunk

@MarcusduSautoy has a new book about shortcuts in mathematics. It's not about "math tricks" but more about the idea that by finding patterns we can be more efficient in how we use mathematics. Here is an interview with him on the topic. 
Curriculum Tags: All

http://ontariomath.blogspot.com/p/podcasts.html

https://freakonomics.com/podcast/frbc-thinking-better/

Image Links

Data about books for any of your literacy focused friends
Curriculum Tags: Gr7, Gr8. MDM4U
https://twitter.com/simongerman600/status/1459569271693053952

What share of the population purchased physical books, what share purchased ebooks in 2020? I purchase real books and audiobooks all the time but ebooks are a rare purchase. I read Moby Dick on my phone once using only micro gaps in my days. Source: https://t.co/TbeRrWrJhr pic.twitter.com/hWZ3pBNnob

— Simon Kuestenmacher (@simongerman600) November 13, 2021

Calculus memes. Nice
Curriculum Tags: MCV4U
https://twitter.com/MathProfPeter/status/1459188752178425862

Me: Teaching how we can apply and interpret the derivative is a major part of a first Calculus course, and so it's important to carefully introduce and motivate each topic.

Also me: pic.twitter.com/B8OnhGsPnC

— Peter Keep (@MathProfPeter) November 12, 2021

There should be no barriers to excelling in math
Curriculum Tags: All
https://twitter.com/Anthony_Bonato/status/1461349070719492105

I'm Anthony Bonato, a proud gay mathematician and author of over 130 papers and five books in my research field of graph theory. To all the LGBTQ+ math folks, know that you don't have to settle for being simply good at math. You can be fantastic at it. #math #STEM #LGBTQSTEMDay pic.twitter.com/Agk0bVZW8v

— Anthony Bonato (@Anthony_Bonato) November 18, 2021

Math Links for Week Ending Nov. 12th, 2021

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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 Friday Nov 8th, 2021

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There was a time in my teaching career when I did think that it was about me telling students what I knew. I feel so much better that over the last 20 years or so, that has changed for me to match this quote from @HowieHua. I do think, however, that many teachers still like to be the "sage on the stage" and that can sometimes be a roadblock to shifting to a more student centred classroom. 
Curriculum Tags: All
https://twitter.com/howie_hua/status/1454443755684052999

I've always wanted a good teaching quote and this might be it. https://t.co/KumDaERkYC

— Howie Hua (@howie_hua) October 30, 2021

Resource Links

I love this because come up with your opinion and then you can verify that no matter which one you choose, they are all nets of a cube right in PolyPad
Curriculum Tags: Gr7, Gr8
https://twitter.com/shskaercher/status/1455128561665331200

Which cube net do you find most counter-intuitive?#playwithmath in the @MathigonOrg Polypad here:https://t.co/Zq6VFq9uVd pic.twitter.com/0i8RZE12iZ

— Mark Kaercher (@shskaercher) November 1, 2021

I remember being in this session of @NatBanting's way back in 2018 and I've always liked the idea of it. I'm glad he's reminded me of it. 
Curriculum Tags: All
http://natbanting.com/oops-i-forgot/

New Blog Post:

"Oops, I forgot..." (A math classroom routine).https://t.co/qjVtNYO1U7

Inspired by my @OAMElearns session from three years ago and the brilliance of @fawnpnguyen #MTBoS #iteachmath

— Nat Banting (@NatBanting) November 2, 2021

Opinion Links

I definitely agree with this. For me, I don't know that I have done the same lesson twice as a teacher and it has only been by request that I've done the same presentation twice at a conference. I always try to do something new. 
Curriculum Tags: All
https://robertkaplinsky.com/presenters-like-musicians-stand-comedians/

If you're a presenter, you'll want to read this short post about a philosophy to avoid sounding like you say the same thing every time: https://t.co/Ohkdqzm92X #iteachmath pic.twitter.com/O4HBZBSqQB

— Robert Kaplinsky (@robertkaplinsky) November 1, 2021

Video/Audio Links

I love the connection to music and I guess I never really knew how much patterning was involved with the solutions on this @Numberphile video featuring @Ayliean. Thanks to @MSBJacobs for this one.
Curriculum Tags: All
https://www.youtube.com/watch?v=PGuRmqpr6Oo

I like the idea of using patterns to introduce the ideas of identities. 
Curriculum Tags: All
https://twitter.com/howie_hua/status/1455326092328267785 

New TikTok video: 4 results in math that make sense due to patterns pic.twitter.com/EBCKYjTn0x

— Howie Hua (@howie_hua) November 2, 2021

I love a good probability riddle and I like this because it reminds us that knowing the sample set is super important for solving some of these problems. 
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U
https://twitter.com/onlinekyne/status/1455212550858104842

Riddle of the day!

What is the probability of rolling snake eyes 👀 if you know that at least one dice rolled a 1? pic.twitter.com/7wx4zvekcB

— Kyne (@onlinekyne) November 1, 2021

I'm not sure how universally useful this is but it's pretty cool
Curriculum Tags: All

https://twitter.com/pickover/status/1455263074114539521

Mathematics, geometry, witchcraft.

Box transformation with four cuts. Source: https://t.co/DJnVDvgp9T pic.twitter.com/xhO3TguRQh

— Cliff Pickover (@pickover) November 1, 2021

Though this is listed as something for grade 9 math, the stuff that @Gingerich_C and @AledaKlassen are talking about using portfolios in math class. These idea would be good for any class in any grade. 
Curriculum Tags: All

https://talks.oame.on.ca/season-4

This is why it's always good to listen to students explanations of their interesting solutions. 
Curriculum Tags: All
https://twitter.com/howie_hua/status/1455698241484255233

New TikTok video: How one student helped me see arithmetic sequences differently pic.twitter.com/yRx0MoUyEL

— Howie Hua (@howie_hua) November 3, 2021

Image Links

I agree with @Sneffleupagus on this one. I think the lesson here is that, as a teacher, you should be accepting of creative thinking
Curriculum Tags: All
https://twitter.com/Sneffleupagus/status/1456661732139675657

I don't get why the teacher marked this wrong. Perfectly reasonable and logical answer from the student. https://t.co/4eqEorU2xU

— Shelby Strong 💗💜💙 (@Sneffleupagus) November 5, 2021

Math Links for Week Ending Oct 29th, 2021

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A spinoff of the NPR show Science Friday is the podcast #ScienceDiction where in each episode they take on a science word and talk about its history. On this episode they talk about the word Algebra. And the thing I love the most about this is that it is that the main part of the story is about a high schooler, Gracie Cunningham, who posted a TikTok asking where algebra came from and it went viral and it seemed like she was made fun of by everyone but math professors. Including great stuff from @StevenStrogatz and @DrEugeniaCheng
Curriculum Tags:All
https://www.wnycstudios.org/podcasts/science-diction/articles/algebra-from-broken-bones-to-twitter-feuds

Resource Links 

I like that @mathequalslove continues to post puzzles that she uses for her class to solve each week. She posts them in a public space and just lets them stew over them.
Curriculum Tags: All
https://mathequalslove.net/three-squared-puzzle/

Check out the Three Squared Puzzle that my students tackled last week! https://t.co/unCOZST23b #mtbos #iteachmath #puzzlingclassroom pic.twitter.com/YD2EKJvXxk

— Sarah Carter (@mathequalslove) October 27, 2021

Doing some work with powers of 10? This might be a good way to start. Thanks to @BenOrlin for reminding me about this book

Curriculum Tags: Gr7, Gr8
https://mathwithbaddrawings.com/2021/09/30/a-hundred-thousand-billion-poems/

Opinion Links 

I having spent about 10 years out of the classroom in a support role, I get what @ddmeyer is saying. Though I’m not a classroom teacher ( I’m a VP) now, being back in a building and sometimes teaching multiple classes a day I have a lot of the same feelings.

Curriculum Tags: All
https://blog.mrmeyer.com/2021/area-man-who-talks-a-lot-about-teaching-teaches-his-first-full-day-in-10-years/

Video Links

I love the contextual connection between ice cream cones and bowls
Curriculum Tags: MDM4U
https://twitter.com/howie_hua/status/1453882299171295235?s=21

New TikTok video: Making sense of the permutation and combination formulas pic.twitter.com/gbFr6qK0ao

— Howie Hua (@howie_hua) October 29, 2021

Image Links

Clever and true
Curriculum Links: MPM2D, MFM2P
https://twitter.com/howie_hua/status/1452355822323834883?s=21

Embarrassing to admit but I actually laughed while making this math meme lol pic.twitter.com/fOpiwXhtuf

— Howie Hua (@howie_hua) October 24, 2021

You don’t have to do crazy elaborate things to engage kids and make them think. Simple tweaks are great and easy to implement.
Curriculum Tags: MPM2D, MFM2P
https://twitter.com/mrsbistro/status/1451621405058113547?s=21

Changed the way I introduced distributive property with #MTH1W today and this task is a keeper!

Inspired by @hpicciotto’s blog, I asked Ss to convince me whether each statement was true or false. They worked in groups at the boards. 1/n pic.twitter.com/kcHeDwqyon

— Andrea Biro (@mrsbistro) October 22, 2021

Interested in the history of TV. Here’s some data on the popularity of various genres I’ve time
Curriculum Tags: MDM4U
https://flowingdata.com/2021/10/26/television-genres-over-time/

How about some visual mathematical poetry? Check the link out for more
Curriculum Tags: All
https://poetrywithmathematics.blogspot.com/2021/10/visual-mathematical-poetry.html

 

Math Links for Week Ending Oct. 22nd, 2021

Featured Links

Are you teaching students about fractions? You might like this ad from A&W making fun of their legitimate marketing blunder from decades ago. Thanks to @Esping_Math for pointing this one out.
Curriculum Tags: Gr7, Gr8, MTH1W
https://twitter.com/awrestaurants/status/1450570978719932426

We’re making up for our worst “marketing fail” ever with a groundbreaking new menu item. Forget everything you know about fractions and wrap your beautiful mind and watering mouth around the A&W 3/9 lb. Burger. It’s bigger, genius. 🍔⚖️ pic.twitter.com/xaeeZj7z60

— A&W Restaurants (@awrestaurants) October 19, 2021

Resource Links

This from @CliffHunter36 is an old post but new to me. But useful if you are remediating multiplication or even looking for a math starter for higher grades to help hone their multiplication skills. And as the post says, "This is not Splat!" Splat is about solving equations, this is about multiplication. You might also like my post on array multiplication cards or @GFletchy's subitizing multiplication cards. 
Curriculum Tags: Gr7, Gr8
https://chrishunter.ca/2017/10/24/paint-splatter-arrays/

Paint Splatter Arrays from Chris Hunter

You can always count on @MathTechCoach to give us some holiday Desmos cheer
Curriculum Tags: All
https://twitter.com/MathTechCoach/status/1451903496345767941

Hey #MTBoS! Here are 2 Pumpkin Creator versions: One is color only (maybe for younger kids?) and one has draggable polygons.https://t.co/nMzJI2aJuThttps://t.co/C3J1p3BtBT pic.twitter.com/rvMvNVvX6v

— Steve Phelps (@MathTechCoach) October 23, 2021

Video Links

One of my favourite mathematical properties is the identity property. This is because it seems so simple (and maybe useless) but the idea of multiplying by 1 and getting the same answer is super powerful in so many branches of mathematics and that is because 1 can come in many forms. 
Curriculum Tags: All
https://twitter.com/howie_hua/status/1452342925308805122

(Remade a) TikTok video: a*1=a. Simple but powerful! pic.twitter.com/Sflz8YBvpM

— Howie Hua (@howie_hua) October 24, 2021

Image Links

Who knew that an emirp is a real thing?
Curriculum Tags: All
https://twitter.com/pickover/status/1449886468931993605

Mathematics.

I tend to love the number 149. You too? pic.twitter.com/OgzQ5b1zft

— Cliff Pickover (@pickover) October 17, 2021

Thanks to @Wheeler_Laura who has done many of the illustrations in @PJLiljedah's new Thinking Classrooms book, we have a nice graphic to help give us question prompts.
Curriculum Tags: All
https://mslwheeler.wordpress.com/2021/09/23/thinkingclassroom-question-prompts-graphic/

Math Links for Week Ending Oct 15th, 2021

Featured Links

It's Global Math Week this week and I think this video contest is a great way to step into it. Video submissions are being accepted until the end of the year
Curriculum Tags: All
https://twitter.com/GlobalMathProj/status/1447558294688567304

Global Math Week is off to a mighty grand start! And the fun of Global Math continues all year! Care to take part in our MATH IS__ video contest? See the details on our Events page here: https://t.co/4zz4N3Ddab@GlobalMathProj @maanow @MathCircleNet @cyfemat #iteachmath #gmw2021 pic.twitter.com/NDH3mloMMH

— The Global Math Project (@GlobalMathProj) October 11, 2021

Resource Links

I don't think you can have enough little math starters and @MathTechCoach has made many. Here's a new one. 
Curriculum Tags: All
https://twitter.com/MathTechCoach/status/1448690816059199489

Hey #MTBOS! Here is another game suitable for younger students. Can you draw a squiggly line from 1 to 25 by passing through each square only once? No diagonal paths. https://t.co/Hb984QmyNA pic.twitter.com/Pc8llWRnop

— Steve Phelps (@MathTechCoach) October 14, 2021

This 20 cube puzzle reminds me a bit of SkyScraper puzzles. None the less, another great math starter. 
Curriculum Tags: All
https://mathequalslove.net/twenty-cubes-puzzle/

This new twenty cubes puzzle is perfect for using with a set of linking cubes! https://t.co/jDYhHEPGAW #mtbos #iteachmath #puzzlingclassroom pic.twitter.com/hBV2kf4iVN

— Sarah Carter (@mathequalslove) October 11, 2021

Some additions to @NatBanting's #MenuMath site:

Curriculum Tags: Gr7, Gr8
http://natbanting.com/menu-math/

Two new #MenuMath posted. https://t.co/eqsKUDpdFS

Estimating square roots (from @KirstDy)
Line and point symmetry (from @CabezasMath)

— Nat Banting (@NatBanting) October 11, 2021

Although it looks like one student is playing another here, it's actually and overview of a game of war and your students have to figure out who won each game.
Curriculum Tags: MHF4U
https://teacher.desmos.com/activitybuilder/custom/615edc6b1c2a8f0a20b9414a

Made a few improvement to my @Desmos trig war game to practice comparing unit circle values. Includes a bit of feedback now. #MatchMyCL #ITeachMath https://t.co/362YAd7ScQ pic.twitter.com/cq1zzNL1xn

— Erick Lee HRCE Math (@TheErickLee) October 8, 2021

Video Links

Years ago I made a video that was similar to this (though not as succinct)
Curriculum Tags: Gr7, Gr8
https://twitter.com/howie_hua/status/1448439634787143680

New TikTok video: Integer subtraction without relying on "two negatives make a positive" pic.twitter.com/X5tbypnLfp

— Howie Hua (@howie_hua) October 14, 2021

Image Links

Someone spent a lot of time on this visualization of the popularity of individual TV episodes. Make sure you zoom in.
Curriculum Tags: MDM4U
https://flowingdata.com/2021/10/15/how-the-longest-running-shows-rated-over-episodes/