Math Links for Week Ending Dec 17th, 2021

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I think this would be a fun activity for you to give to your students: Make a Math Meme. Be sure to check the comments for all the examples
Curriculum Tags: All
https://twitter.com/howie_hua/status/1472059465339785218

I asked students to make a meme of me/this class and here are some of them, starting with one that made me laugh out loud: pic.twitter.com/2rR3FE6IMw

— Howie Hua (@howie_hua) December 18, 2021

Resource Links

You can do some pretty cool stuff with Graspable Math
Curriculum Tags: MTH1W
https://twitter.com/math_inquirer/status/1469818648332275719

Wondering if anyone has tried @GraspableMath with Ss in #mth1w? Your observations? I'm going to give it a try. Here's a shareable activity I've made re: simplifying polynomial expressions: https://t.co/gnAnElHkMA #mathedu #onted #iteachmath #MtBos #AforL #AasL pic.twitter.com/L8aW27SJts

— Chris Stewart (@math_inquirer) December 11, 2021

I think any support we can give students when solving equations is helpful. Especially when it's not "follow these 7 steps when you see this situation"
Curriculum Tags: MTH1W
https://twitter.com/joelbezaire/status/1470566365467750412

I did this @Desmos activity again today, and it again went really well. I’m re-upping it here since I just haven’t seen anything else like it lurking around.

Middle school multi-are equations, error analysis, encouraging flexibility with steps, etc. https://t.co/LsePu3iLtY

— Joel Bezaire (he/him) (@joelbezaire) December 14, 2021

I can't wait to start making equations to solve with my face on the values :-)
Curriculum Tags: Gr7, Gr8, MTH1W, MFM1P
https://twitter.com/davidporas/status/1470555607904227330

Do you know you can easily assign values to imported images on Polypad and then use them on the balance scale?

Learn how at https://t.co/RWgtHEtICG

Maybe give this puzzle a try with elementary students?https://t.co/9tlO5dSH31 @MathigonOrg #math #mathchat #iteachmath #mtbos pic.twitter.com/bAutvhyo7o

— David Poras (@davidporas) December 14, 2021

Video Links

Math is everywhere, right? Especially if you need a bar graph
Curriculum Tags: Gr7, Gr8
https://twitter.com/msbjacobs/status/1470136358274482176

Math(s) doesn’t get any sweeter than this @QualityStreetUK pic.twitter.com/WfuDYyDBlW

— Michael Jacobs (@msbjacobs) December 12, 2021

I like the numerical way that is used to prove this. And check out the comments for a visual solution
Curriculum Tags: MTH1W, MCR3U
https://twitter.com/howie_hua/status/1471283950190358534

New TikTok video: Which is greater, 9^10 or 10^9? pic.twitter.com/iBpM8RicOv

— Howie Hua (@howie_hua) December 16, 2021

A different way to do a net of a cylinder:
Curriculum Tags: Gr7, Gr8
https://twitter.com/MagicPi2/status/1469575522342641665

Net of an open cylinder#mtbos #iteachmath #Math #Maths pic.twitter.com/8ewECcp95u

— Idan Tal (@MagicPi2) December 11, 2021

Image Links

Here is some data that you can have your kids use to verify what they know about exponential growth
Curriculum Tags: MCR3U
https://twitter.com/imgrund/status/1471323108871188480

All of my R values tomorrow reflect the newest data on generation times, released December 2nd, 2021 from a paper out of London, England.

Here’s my updated, “What does this Rt mean?” chart which corresponds to these significant changes. pic.twitter.com/YFV472ODzK

— Ryan Imgrund (@imgrund) December 16, 2021

It's always good to see math in nature
Curriculum Tags: All
https://twitter.com/GeomeTribal/status/1469004937220829188

Natural microscopic dodecahedrons, with twelve pentagonal sides 😍

1. Pollen grain from the greater stitchwort (Stellaria holostea)

2. Braarudosphaera bigelowii, a single-celled phytoplanktonic algae with a fossil record going back 100 million years, long before Plato! pic.twitter.com/EgYSD2j5nI

— Ancient Geometry (@GeomeTribal) December 9, 2021

A logarithmic Meme, nice
Curriculum Tags: MHF4U
https://twitter.com/cbrownLmath/status/1469766108647329792

I wish I could take credit for this meme but it is definitely @howie_hua worthy even if he didn’t make it himself. #mathjokes #mtbos #mathmemes #weplaymath @lilmathgirl pic.twitter.com/a3JqKylCip

— "Dr. Chris" Brownell _Just got Boostered! (@cbrownLmath) December 11, 2021

Math Links for Week Ending May 28th, 2021

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

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

— Howie Hua (@howie_hua) May 21, 2021

Resource Links 

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

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

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

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

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

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

Video Links 

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

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

— Kyne (@onlinekyne) May 14, 2021

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

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

— Idan Tal (@MagicPi2) May 17, 2021

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

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

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

— Tungsteno (@74WTungsteno) May 24, 2021

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

Image Links 

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

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

— Chris Nho (@nhoskee) May 19, 2021

Math Links for Week Ending Apr 16th, 2021

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

Great question for a #MathForSocialJustice class:

What's misleading about the original @cnn tweet?

What's misleading about @PatFinelli's retweet?

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

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

Resource Links

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

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

— Howie Hua (@howie_hua) April 15, 2021

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

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

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

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

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

— Tim Brzezinski (@TimBrzezinski) April 12, 2021

Video Links

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

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

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

— Ed Southall (@edsouthall) May 11, 2020

Image Links

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

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

— Cliff Pickover (@pickover) April 13, 2021

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

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

— Cliff Pickover (@pickover) April 13, 2021    

Math Links for Week Ending Apr. 9th, 2022

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This reminds me of my Percent Guesser but it's way better. 
Curriculum Tags: Gr7, Gr8
https://twitter.com/kurt_salisbury/status/1379069206977777672

How good are you at estimating fractions? @desmos #iteachmath #mtboshttps://t.co/Uwke3OsJSi pic.twitter.com/kx4VA9wrAO

— Kurt Salisbury (@kurt_salisbury) April 5, 2021

Resource Links 

I have always loved the ability to show math relationships with physical constructions. In this case, from @DPScher, we investigate the sum of the angles in a triangle. I have a @Desmos version here but this is way more hands on. 
Curriculum Tags: Gr8, MPM1D, MFM1P
http://www.sineofthetimes.org/triangle-angle-sum-embodied/

I don't think Marilyn Burns has invented this game but it's a good starter that can be used at any age. It seems like it's easy and it is easy to play. But to consistently win, you have to create a strategy. Try it out
Curriculum Tags: All
https://marilynburnsmath.com/race-for-20%e2%80%95a-counting-game-for-all-ages/

Something that most kids can probably relate to is the tooth fairy. So why not a step function representation of tooth fairy earnings? With this interactive, you can actually play with the parameters and see how things might change.
Curriculum Tags: MCR3U, MHF4U
https://flowingdata.com/2021/04/08/tooth-fairy-exchange-rate/

Video/Audio Links 

I have recently read @TimHarford's new book The Data Detective and there is one story in it about Florence Nightingale and her famous graph that told the story of the infections happening and why increasing sanitary conditions would lower the death rate in the military hospitals. Before you hear that story you might want to watch this to get a visual of the actual graphs she was making
Curriculum Tags: MDM4U
https://www.youtube.com/watch?v=VTdVPNvwULM

And now here is @TimHarford's story from his book and on his podcast Cautionary Tales. In it he digs way deeper into the story and actually talks about some more hidden sides. 
Curriculum Tags: MDM4U
https://timharford.com/2021/03/cautionary-tales-florence-nightingale-and-her-geeks-declare-war-on-death/

A few weeks ago I posted a video from @standupmaths about proving there was cheating happening on a record breaking speed run on MineCraft. Here's a shorter audio version from the @BBCMoreOrLess podcast.
Curriculum Tags: MDM4U
https://www.bbc.co.uk/programmes/p09ch7qv

Image Links 

A good way to bring the real world into proving things in analytic geometry
Curriculum Tags: MPM2D
https://twitter.com/MrValencia24/status/1374434972585496577

Today geometry ss at #WeAreChappaqua used @geogebra to prove/disprove a real object in their house was a parallelogram using a method of their choice 🙂#MTBoS #ITeachMath #MathisFun #MathRocks #MathPlay #MathEd pic.twitter.com/XCZ4ohUVES

— Libo Valencia (@MrValencia24) March 23, 2021

Math Links for Week Ending Apr. 2nd, 2021

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I have a pile of @Desmos activities that are useable but not ready for primetime (if you are interested here's a link) but I am slowly cleaning them up and releasing them. In this case, it's a way to introduce the Pythagorean theorem by focusing on the area model, well before just looking at the abstract relationship. 
Curriculum Tags: Gr8, MPM1D, MFM1P
https://teacher.desmos.com/activitybuilder/custom/5ef94d7221f7d778901d9338

I've also learned some Pattern Matching in Desmos CL from @MrChowMath and released a couple of others. One on investigating Pi and the other on Scientific Notation (with two versions - one with only positive exponents the other with both positive and negative). 
Curriculum Tags: Gr7, Gr8
https://teacher.desmos.com/activitybuilder/custom/603c2e023614df0d4f67c7aa
https://teacher.desmos.com/activitybuilder/custom/5f713da629b5b60b2f6a5aac
https://teacher.desmos.com/activitybuilder/custom/5f6c7c97a9176f3ebf55f986

[New @Desmos Activity] If you have done an informal activity where students measure the circumference & diameter of various circles to estimate Pi, then this short activity helps to solidify that it's actually 3.14https://t.co/JUNFclWxKi#MathChat #MTBoS #iTeachMath pic.twitter.com/i9lFDB14E6

— David Petro (@davidpetro314) March 28, 2021

[New @Desmos Activity] Thanks to @mrchowmath and his pattern matching tutorial videos, I finally have this set of scientific notation practice problems working wellhttps://t.co/JUNFclWxKi#MathChat #MTBoS #iTeachMath pic.twitter.com/7TFk6SGazM

— David Petro (@davidpetro314) March 28, 2021

Resource Links
I was just talking about this problem in class in the context of Pi Day. Now we have a way to do multiple experiments. 
Curriculum Tags: MDM4U
https://twitter.com/Christophe_Sew/status/1376843025784008710

Toothpicks ✅
Paper ✅@desmos activity ✅

All ready for some Buffon's Needle tomorrow. 🧮https://t.co/S33WXtOwLm@davidpetro314 #ImproveMyAB #ITeachMath pic.twitter.com/QfUSAkxIhs

— Mr. S (@Christophe_Sew) March 30, 2021

Have you heard? There was a ship stuck in the Suez Canal. This article has so much good information, I dare you not to come up with at least one related math problem. 
Curriculum Tags: All
https://www.washingtonpost.com/world/2021/03/25/faq-suez-canal-ever-given/

Lots of information here that you could easily create some #math problems out of https://t.co/dMIF0qnLaK

Pythagorean Theorem, Ratios, Trig, angles and more#MathChat #MTBoS #iTeachMath

— David Petro (@davidpetro314) March 28, 2021

I can't get enough of these #SlowRevealGraphs from @jennalaib. Be sure to check out the entire site for all the posts. 
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U
https://slowrevealgraphs.com/2021/03/29/speedy-animals/

I like skyscraper puzzles, an now a @Desmos version
Curriculum Tags: All
https://twitter.com/TMonark/status/1378074463141519363

I edited @TheErickLee 's awesome #SkyScrappersPuzzle with a "Reset" button with the help of @mrchowmath and offered it to my Geometry class before we start doing #TriangleCongruence and it was fun and full of #LogicalThinking #MTBoS https://t.co/lImwtjpqWj pic.twitter.com/EYF3sYzfm3

— Monark Trivedi (@TMonark) April 2, 2021

Video Links

This is older but I hadn't seen it before. Good for probability discussions including the need for multiply trials in order to have experimental probability match theoretical. Thanks to @robinmath3 for pointing this one out. 
Curriculum Tags: Gr7, Gr8, MDM4U, MBF3C
https://www.youtube.com/watch?v=FRlbNOno5VA

I had to look up what the Euclidian Algorithm was but thanks to this video, I have a better idea. 
Curriculum Tags: Gr7, Gr8

https://twitter.com/howie_hua/status/1369476859092557826

Tactile version of the Euclidean Algorithm pic.twitter.com/Hjj5TEO5Q3

— Howie Hua (@howie_hua) March 10, 2021

A couple more pattern matching videos from @MrChowMath for those Desmos CL-Heads out their
Curriculum Tags: All
https://www.youtube.com/watch?v=oPAevo7CaHU
https://www.youtube.com/watch?v=JTAGsw1InOg

Image Links

Here's a good reminder of why this classic thinking problem is a good one
Curriculum Tags:All
https://twitter.com/MrValencia24/status/1375499464509681667

Inspired by the work of @pgliljedahl, today ss at #WeAreChappaqua experienced a different approach.

Engagement ✔️
Collaboration ✔️
Knowledge Mobility ✔️
Gallery Walk ✔️#ThinkingClassroom ✔️#MathPlay ✔️#MTBoS #ITeachMath #MathisFun #MathRocks #MathArt #MathEd pic.twitter.com/fKPb5JjO02

— Libo Valencia (@MrValencia24) March 26, 2021

And Ever Given keeps giving us math problems
Curriculum Tags: Gr8, MPM1D, MFM1P
https://twitter.com/howie_hua/status/1375660413065437187

Math teachers: "Okay class, given line m is parallel to line n and angle a is 135 degrees, find the measure of the missing angles." pic.twitter.com/7dB25JYxTt

— Howie Hua (@howie_hua) March 27, 2021

This seems like a pretty complex way to calculate root 2 but I like it.

Curriculum Tags: All
https://twitter.com/pickover/status/1375493243266289671

This is mathematics. https://t.co/0pMybzHYfP pic.twitter.com/Qe0s71LpHk

— Cliff Pickover (@pickover) March 26, 2021

I've always like this story about Ramanajan
Curriculum Tags: All

https://twitter.com/fermatslibrary/status/1376525060488454153

1729 was the number of the cab that G.H. Hardy took when he visited S. Ramanujan in the hospital.

Hardy thought it was a "dull number" and Ramanujan replied "it is a very interesting number. It is the smallest number expressible as the sum of two cubes in two different ways" pic.twitter.com/OFc0UATSXR

— Fermat's Library (@fermatslibrary) March 29, 2021

Math Links for Week Ending Mar 26, 2021

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Though these are not specific to math, I think that any help with assessment is good for teaching. Here @Wheeler_Laura compiles some ideas from the Twitterverse
Curriculum Tags: All
https://mslwheeler.wordpress.com/2021/03/10/%f0%9f%9a%bd-learningintheloo-efficient-grading-practices/

 Resource Links

Here's a nice interactive to demonstrate common denominators with adding fractions. 
Curriculum Tags: Gr7, Gr8
https://www.geogebra.org/m/zg6dvrh9

I made this fraction thingy in @geogebra https://t.co/yuAXaI91RA pic.twitter.com/86fOwXoQUD

— Steve Phelps (@MathTechCoach) March 20, 2021

Video Links

In this 3-Act Task, from Dane Ehlert, we look at rate/ratios with real numbers (and dominos). Below is the first act. 
Curriculum Tags: Gr8, MPM1D, MFM1P
https://whenmathhappens.com/2021/03/22/dominoes/

For those of you into Desmos CL, then you know that the pattern matching code is both interesting and powerful but perhaps a bit of mystery. In these three videos @MrChowMath walks us through some samples. 

Curriculum Tags: All
https://www.youtube.com/watch?v=NtDJdVW5uMk

https://www.youtube.com/watch?v=EEfBweAWVEM
https://www.youtube.com/watch?v=9TNf4sZ2iD4

Image Links

It turns out you can think about math too much
Curriculum Tags: All
https://twitter.com/pickover/status/1374142930689089537

Mathematics, Feynman, physics.

The divorce complaint of Richard Feynman's second wife, hater of calculus. pic.twitter.com/bzwDeGnH8k

— Cliff Pickover (@pickover) March 22, 2021

Math Links for Week Ending Mar. 19th, 2021

Featured Links

Last summer I shared the site Mathigon.org as a new "textbook of the future". More recently, I have started to use their virtual manipulative repository Polypad. There is so much here - algebra tiles, fraction tiles, prime factor circles, customizable spinners and so much more. You can create a class and share things within your class and via Google Classroom (among other places). Just check out their YouTube channel for all kinds of ideas.
Curriculum Tags: All
https://mathigon.org/polypad 

Resource Links

More work from @TimBrzezinski, this time on equivalent ratios
Curriculuum Tags: Gr7, Gr8, MPM1D, MFM1P
https://twitter.com/TimBrzezinski/status/1371947548441784320

Creating = ratios with an @openmiddle theme. How many proportions can we create? Which digit(s) are not as user-friendly as others? Why? 🤔 https://t.co/NJfqzTypUg @geogebra @robertkaplinsky #MTBoS #ITeachMath #math #ElemMathChat #MSMathChat pic.twitter.com/4od6OQ04JO

— Tim Brzezinski (@TimBrzezinski) March 16, 2021

Having good math starters is a great way to keep students engaged. @SteveWyborney has a lot on his site and one he calls Esti-mysteries. I like them because not only are they low floor because all kids can estimate but then he goes on to give clues based on the answer so kids can start using their mathematical skills to refine their guesses. Totally check them out but @RNHung has turned a bunch of them into a @Desmos activity so take a look at that too.
Curriculum Tags: Gr7, Gr8
https://teacher.desmos.com/activitybuilder/custom/5fc84f717124020d13b2d9a4

The BEST conversations in breakout rooms this year. Esti-mystery tasks are all created by middle school students, bundled into a @desmos activity. Thank you @stevewyborney @mr_stadel @edcamposjr @Cbustamante2222 #FAME20 @maeputt #teach180 https://t.co/Yz8bSqt2yA pic.twitter.com/IF4LXP8WE7

— Richard Hung (@rnhung) December 18, 2020

Article Links
Another link to add to you Pi Day collection
Curriculum Tags: All
https://twitter.com/stevenstrogatz/status/1370750077661290500

Pi Day is tomorrow. Here was my attempt, a few years ago, to explain what all the fuss *should* be about. https://t.co/0p8Z7fpWOV

— Steven Strogatz (@stevenstrogatz) March 13, 2021

Video Links

This high school student has mad function skills
Curriculum Tags: MCR3U, MHF4U
https://twitter.com/Desmos/status/1372307145220370434

Let's go #BehindTheGraph with "Hummingbird" by Veronika Price from Berkeley High School! Throw a 💚 down for Veronika! https://t.co/XJEyDHWqsU pic.twitter.com/cRKEpjv7lT

— Desmos.com (@Desmos) March 17, 2021

Image Links

Here is an interesting data visualization
Curriculum Tags: MDM4U 
https://twitter.com/simongerman600/status/1369211417321148416

People calculate the weirdest things. Which celebrity based on their date and location of birth, was most likely to have been conceived at the 1969 Woodstock festival? Apparently the answer is Tina Fey. Source: https://t.co/UfkeiZa3JA pic.twitter.com/SAyEGGnt0V

— Simon Kuestenmacher (@simongerman600) March 9, 2021

A simple premise but definitely some good problem solving needed to determine the answer here. 
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://twitter.com/jamestanton/status/1370858260010463232 

It's already pi-day in some parts of the world. So here's tomorrow's puzzle now: a tweak on a classic. 10 cm of perimeter length added to a square, an equilateral triangle, a circle. Which has smallest gap width? [Or am I being foolish: it all depends on the sizes of the shapes?] pic.twitter.com/rKU7tXcwJc

— James Tanton (@jamestanton) March 13, 2021

Math Links for Week Ending Mar. 12th, 2021

Featured Links

It seems that @TimBrzezinski has really been on the @Openmiddle train lately. Here are two more to add. One on the distributive law and the other on order of operations.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://www.geogebra.org/m/suwcgzyd
https://www.geogebra.org/m/amukryav

Building a distributive property expression with an @openmiddle theme. My hope is that this will actually help Ss remember to distribute in the future. Where would we NOT want to place certain digits? Why? 🤔 https://t.co/3m33zqFiIC @geogebra @robertkaplinsky #MTBoS #ITeachMath pic.twitter.com/KxGIBD3t0V

— Tim Brzezinski (@TimBrzezinski) March 12, 2021

Re: order of operations, excited to be on an @openmiddle theme for my MS Ss. Feedback provided, yet they’ll still need to reason. Create TONS of versions by having Ss set their own goal value (lower left): https://t.co/p9EK6FjREB @geogebra #MTBoS #ITeachMath #math #RemoteLearning pic.twitter.com/Aai123c9EM

— Tim Brzezinski (@TimBrzezinski) March 7, 2021

Resource Links

Many students look at our normal everyday math problems as impossible.  Most are not, but you might want to give them some insight into some real impossible problems of geometry, topology and other topics. 
Curriculum Tags: All
https://www.quantamagazine.org/when-math-gets-impossibly-hard-20200914/

Many of the most celebrated results in mathematics are proofs of impossibility. https://t.co/7DKyhG0rJm pic.twitter.com/Lt0EKHYgU4

— Quanta Magazine (@QuantaMagazine) March 7, 2021

It's Pi Day on Sunday. Here are all of my PiDay resources. I am trying to suggest that The Rolling Stones are secret Pi lovers. Do you see it?
Curriculum Tags: All

https://www.pinterest.ca/davidpetro314/pi-day/

Opinion Links

Getting kids talking is the focus of the book Five Practices for Orchestrating Productive Mathematics Discussions. It's a great book with a lot of great ideas. Extending some of those ideas is @GeoffKrall in this post. Check it out for more thoughts on expanding the conversation in your math class. 
Curriculum Tags: All
https://emergentmath.com/2021/03/11/the-next-steps-in-classroom-conversation-orchestration/

What's AFTER the "five practices for orchestrating productive math discussions." Great, from @geoffkrall. https://t.co/Y8Mc1OjouN

— Dan Meyer (@ddmeyer) March 12, 2021

Video Links

I think there is some great stuff on this YouTube channel (especially if you love Legos) but in this video they make a machine that creates a gearing ratio of 1 Googol:1. Before you get to it in the video, have your students figure out how long it will take for the last gear to rotate once. 
Curriculum Tags: Gr7, Gr8
https://www.youtube.com/watch?v=QwXK4e4uqXY

A musical interlude for your pleasure
Curriculum Tags: All

https://twitter.com/MarkChubb3/status/1370392504722452486

Mathematical disagreement... turned into song for our entertainment: https://t.co/86Xgx5B8eC

— Mark Chubb (@MarkChubb3) March 12, 2021

Image Links

One way to remember the digits of Pi is to make a poem with words with the same number of letters as the digits. 
Curriculum Tags: All
https://poetrywithmathematics.blogspot.com/2021/03/math-girl-gives-us-pi.html

Soon it will be Pi-Day (3/14); celebrate by speaking in Pilish! For examples, visit https://t.co/2aAAB2I6v8 #PiDay2021 pic.twitter.com/zHPvyc5dBx

— JoAnne Growney (@MathyPoems) March 11, 2021

Math Links for Week Ending Mar. 5th, 2021

Featured Links

I like the idea of puzzles that promote mathematical thinking. These grid puzzles do just that. These were developed by @CaroleGreenes and Tanner Wolfram. The Alge-grids has a 3x3 grid with algebraic expressions in each box. They all have the same variable, a, and the object is to fine the one value of a that gets the numbers 1-9 appear in the boxes. The Pattern-grids requires you to put 3 Xs, circles and triangles in the grid in a certain way based on the hints shown. These are the PDF digital copies of the books with over 50 puzzles in each book. 
Curriculum Tags: All
Alge-Grid
Pattern-Grid

Resource Links

I like these @openmiddle type problems and this factoring one from @MathEqualsLove is a good example. 
Curriculum Tags: MPM2D, MCR3U, MCF3M, MBF3C
https://mathequalslove.net/factoring-puzzle/

I really like this open-middle style factoring puzzle from Public Schools of North Carolina's Resources for Algebra Blackline Masters. I recreated it in both Google Slides and Jamboard. https://t.co/jfyQQOyFxv #mtbos #iteachmath #iteachalgebra pic.twitter.com/N0vrfXIDZg

— Sarah Carter (@mathequalslove) February 26, 2021

Systems of equations with balances via @Desmos
Curriculum Tags: MPM2D, MFM2P
https://teacher.desmos.com/activitybuilder/custom/5db31fdacbf6600c2fc16005?collections=5f8a43dd06b0d9a8bd84c3d0%2C5f8a442006b0d9a8bd84c3d4

Dynamic hangars! Help your students understand systems of equations using “Make Them Balance,” an activity from our new middle school math curriculum. https://t.co/2n5Q7SSMYh pic.twitter.com/ae96EOiKN2

— Desmos.com (@Desmos) February 26, 2021

Here's a great foldable to connect geography and geometry
Curriculum Tags: MPM1D, MFM1P
https://twitter.com/idm314/status/1365395922516082692

We made a foldable version of the Fuller map in our poster. Print it and build your own icosahedral globe.https://t.co/K7WtHCBPFU pic.twitter.com/Y9Dc5gBis1

— International Day of Mathematics (@idm314) February 26, 2021

Opinion Links

I think this is a great idea for assessment protocols. It should certainly take away some anxiety. 
Curriculum Tags: All
https://twitter.com/wheeler_laura/status/1366566694110519296

My first step in this direction was to use @howie_hua's strategy of reading the test over as a group. Then w/o pencils or calculators they get 5 mins to go talk to anyone they'd like. After 5 mins everyone comes back to their seat & writes test individually. #ThinkingClassroom https://t.co/wVrkQA1OEl

— Laura Wheeler (@wheeler_laura) March 2, 2021

Video Links

PiDay is coming up
Curriculum Tags: All
https://www.youtube.com/watch?v=BdHFLfv-ThQ

Image Links

Do you have enough geometric skills to figure this out?
Curriculum Tags: MPM1D, MFM1P
https://twitter.com/panlepan/status/1364891666457522176

The octagon that thinks it's David Bowie.
What fraction of this regular octagon is coloured in red ?#GeometrySnacks #ShowYourWork #WFIS pic.twitter.com/UwrRkL0qoR

— Vincent Pantal🍩ni (@panlepan) February 25, 2021

How pointy is your angle? A math pickup line, perhaps?
Curriculum Tags: MPM1D, MFM1P
https://twitter.com/jamestanton/status/1366387133934489600

The "pointiness" of an angle of measure x degrees is
(180-x)/180.
Eg a straight angle is flat & has 0 pointiness. A small angle is sharp & has pointiness close to 1. The total pointiness of a polygon is the sum of the pointinesses of all its corners. What do you notice? pic.twitter.com/dw11LdFjUD

— James Tanton (@jamestanton) March 1, 2021

There is math all around us. You just have to notice it
Curriculum Tags: All
https://twitter.com/davidpetro314/status/1366952230620852225

Clearly we really like these chips at my house. Three different people bought three different sized bags today. There is a math problem here somewhere #MathChat #MTBoS #iTeachMath pic.twitter.com/S2OxZ90nuP

— David Petro (@davidpetro314) March 3, 2021

Math Links for Week Ending Feb 5th, 2021

Featured Links 

I have to say that I am thrilled to see @Desmos redo Central Park. This was the activity that sold me on Desmos activities but it was built before Activity Builder was a thing so once AB came to be, Central Park couldn't take advantage of all the features that we now love about doing an activity with Desmos (anonymize, pacing, snapshots etc). So enjoy the new version of Central Park and watch the #DesmosLive to get all the details (including a glimpse of some of the original storyboards) 
Curriculum Tags: Gr8, MPM1D, MFM1P
https://teacher.desmos.com/activitybuilder/custom/5ff742fb21f340325c622029

👋 On tomorrow's #DesmosLive, we're saying goodbye to one of these four beloved activities ... and replacing it with a new one.

📆 Thursday 2/4
⏰ 4PM Pacifichttps://t.co/ZYmNJdDhV0 pic.twitter.com/YmN3vkEveX

— Desmos.com (@Desmos) February 3, 2021

Resource Links 

One of the things that @Desmos has done is try to go beyond math by including things like checkin screens where students can say how they feel. And, of course, that means other people will start to make their own. So I love this checkin screen from @Kristen_Faust where you get to answer "Which Sloth Are You?" Add it to one of your activities today
Curriculum Tags: All
https://teacher.desmos.com/activitybuilder/custom/6014bb83896ade35c04cfe3b

Such a great activity for students are doing work around Pythagorean theorem, distance between points, irrational roots etc
Curriculum Tags: Gr8, MPM1D, MFM1P, MPM2D, MFM2P
https://teacher.desmos.com/activitybuilder/custom/6016e9217509aa0bd885d413

Left #desmoslive with animation and shimmy tips from @von_Oy and added them into our current pursuit of irrational lengths of line. We have been finding lengths in geoboard and it is time to order them. Thanks @desmos team. pic.twitter.com/5Pryiinc0Z

— Paul Jorgens (@pejorgens) January 29, 2021

A collection of data about Superbowl commercials
Curriculum Tags: MDM4U
https://twitter.com/FiveThirtyEight/status/1357862583592706051 

Like millions of viewers who tune into the big game year after year, we *love* Super Bowl commercials. We love them so much, in fact, that we wanted to know everything about them … by analyzing and categorizing them. https://t.co/lAtlQjkMlC

— FiveThirtyEight (@FiveThirtyEight) February 6, 2021

Article Links 

I recently interviewed @RobertQBerry for an upcoming @OAMEtalks episode but in the mean time:
Curriculum Tags: All
https://twitter.com/MathGiftedBlack/status/1356210695646310404

Today MGB spotlights Robert Berry, an Associate Dean of Diversity, Equity, and Inclusion. Also a Past-President of the National Council of Teachers of Mathematics (NCTM).
Read more about Robert Berry athttps://t.co/EsSGLdZQTK pic.twitter.com/gOCkgxmY3L

— Mathematically Gifted and Black (@MathGiftedBlack) February 1, 2021

We need more secret math societies
Curriculum Tags: All
https://twitter.com/QuantaMagazine/status/1357661756504612864

Nicolas Bourbaki was a real-life 19th-century French general who never had anything to do with mathematics. It’s unclear why his name became the pseudonym for a secret society of mathematicians. https://t.co/P77V5PsW4D

— Quanta Magazine (@QuantaMagazine) February 5, 2021

Video Links 

What would it be on Superbowl weekend without some math based content. In this case, it's probability
Curriculum Tags: MDM4U
https://twitter.com/PriceIsRight/status/1357297861239730180

The #SuperBowl is almost here with the @Chiefs vs. the @Buccaneers. There's only one way to predict who will win this big showdown... #PLINKO!

Watch Super Bowl LV live Sunday, February 7 on @CBS and streaming on CBS All Access or the @CBSSports app. pic.twitter.com/6kAOVBdnT9

— The Price Is Right (@PriceIsRight) February 4, 2021

Image Links 

Finally
Curriculum Tags: All
https://local.theonion.com/man-scores-vintage-coin-operated-texas-instruments-grap-1846181894

Finally @TheOnion has some #math related stories. In this case, dealing with that vintage @TICalculators https://t.co/mpiEMkwFT6#MathChat #MTBoS #iTeachMath

— David Petro (@davidpetro314) February 4, 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/

Math Links for Week Ending Dec 25th, 2020

Featured Links

@TimBrzezinski has your back when it comes to dynamic Open Middle problems using @Geogebra. He's created, of course, geometry but also arithmetic, algebra, trig and calculus problems. Take a look
Curriculum Tags: All
https://www.geogebra.org/m/jazvukfd

Here, an entire collection of @openmiddle problems created in @geogebra : https://t.co/99ZxfoLVkQ.

Create a GeoGebra class from any of these. Actively engage Ss & watch their progress in real time. More will be added to this growing set. 🙂 #MTBoS #ITeachMath #RemoteLearning

— Tim Brzezinski (@TimBrzezinski) December 21, 2020

This new @openmiddle problem with feedback can help Ss think critically re: graphing trig functions w/amplitude & period change. Create a @geogebra class from https://t.co/ToRIRKVK2s, & work together in remote or hybrid settings! #MTBoS #ITeachMath @robertkaplinsky #math #maths pic.twitter.com/DmFMzHpFAv

— Tim Brzezinski (@TimBrzezinski) December 18, 2020

Resource Links

@AlexOverwijk asks a question and posts some of his student's unique solutions in the comments. Some great discussion shows up too. 
Curriculum Tags: MHF4U
https://twitter.com/AlexOverwijk/status/1071137538574757888

Help me out.
How do you want students to solve exponential equations when the bases are different?
For example:

2^(3x-5)=7^(-x+1)

or some variation of this.

Go #mtbos #iteachmath

Asking because I didn’t tell the S’s how-you would not believe what they came up with.

— Alex Overwijk (@AlexOverwijk) December 7, 2018

Here's another one of @Mathsjem's resource posts. Much like I do here, she compiles great things she finds on the web for math. In this post, place value, fractions, pie graphs, speed-distance-time and more. 
Curriculum Tags: All
https://www.resourceaholic.com/2020/12/5-maths-gems-139.html

New! My 139th gems post. Ideas, resources and updates for maths teachers. 💎https://t.co/eHK4AjE9aC

Hat tips to follow.

I know some of you will not want to read this right now - a break is in order - but it will still be there in January! 😀#mathsgems #mathschat #teammaths pic.twitter.com/kl3gwiMfCw

— Jo Morgan (@mathsjem) December 18, 2020

Opinion Links

Do you want to see how math connects with heavy metal music? Well @MathGarden and @HeavyMetalMaths have figured that out
Curriculum Tags: All
https://sunilsingh-42118.medium.com/how-does-a-love-for-heavy-music-embolden-a-love-for-mathematics-c254c947f0b4

Video Links

On the latest @Desmos Live they go through the best they've seen this year. Some cool stuff here. I totally agree with the last one. 
Curriculum Tags: All
https://youtu.be/MzSw00SSPEM?t=1064

Check out all the cool animations from @MattHen2
Curriculum Tags: All
https://blog.matthen.com/archive

10 years ago I started my maths animation blog on tumblr pic.twitter.com/jTLAKAjpOi

— Matt Henderson (@matthen2) December 24, 2020

Here is a Christmas example of 3D geometry in real life from @standupmaths
Curriculum Tags: All
https://www.youtube.com/watch?v=TvlpIojusBE

Image Links

The "truth" about statistics 
Curriculum Tags: MDM4U
https://twitter.com/xkcdComic/status/1340071757525311488

Statistics https://t.co/g2vbvtFe2e https://t.co/Nfs9xcG7eK pic.twitter.com/2oLoV1LCfc

— XKCD Comic (@xkcdComic) December 18, 2020

Some cool responses in the comments from this classic angle problem (including one from me and @MSBJacobs)
Curriculum Tags: MPM1D, MFM1P
https://twitter.com/jamestanton/status/1340289039052599303

A classic: What can you say about the sum of the measures of the angles at the tips of a wonky (or not wonky) five-pointed star? pic.twitter.com/ffhBGcUp1W

— James Tanton (@jamestanton) December 19, 2020

What a great simple task dealing with adding fractions. Be sure to check out the comments for some examples
Curriculum Tags: Gr7, Gr8

https://twitter.com/mathhombre/status/1337603004619501569

goal is to make four or more different fractions that sum to one. What about Lydia's solution? #fractionchat pic.twitter.com/kvtOYeFhVj

— John Golden (@mathhombre) December 12, 2020

There is a lot of data that can be mined in Google Trends. I have written about how you can use this in class in the past here. But why not look at this year's Year in Search
Curriculum Tags: Gr7, Gr8, MDM4U
https://trends.google.com/trends/yis/2020/GLOBAL/

Interesting! Many of these are absolutely in my search history and we know that Google Classroom has certainly been a vital tool for SO many during this pandemic. Tesla stock definitely never entered my search realm 🤷‍♀️ pic.twitter.com/PQniJ0WApv

— Kim Bouchard (@KimMomofNine) December 23, 2020