Math Links for Week Ending Mar 26, 2021

Featured Links
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. 26th, 2021

Featured Links

I had a fun season recording the @OAMEtalks podcast and in the last few bonus episodes we were talking with some of the featured and keynote speakers from #OAME2021 and I asked each of them what they thought was working well with online learning. This episode is what they all said:
Curriculum Tags: All
https://twitter.com/OAMEtalks/status/1365416732937121792

[NewPodcast] This 3rd bonus episode feat. #OAME2021 featured & keynote spks incl: @RobertQBerry @LLB_315 Ron Lancaster @gfletchy @Pi_Lab @ddmeyer @MrOrr_geek @GailBurrill @MathletePearce @MarianSmall

Still time to register https://t.co/lR8yGqAeqi#MathChat #MTBoS #iTeachMath pic.twitter.com/bJID9CtEn1

— OAME talks (@OAMEtalks) February 26, 2021

Resource Links

I really like this Desmos version of an @OpenMiddle problem created by @TimBrzezinski
Curriculum Tags:Gr7, Gr8
https://twitter.com/TimBrzezinski/status/1363511368297701377

Sorry for the broken link below. Here it is: https://t.co/lETBU7qv2Q https://t.co/sa3B4BZY0F

— Tim Brzezinski (@TimBrzezinski) February 21, 2021

Video/Audio Links

I like the ability to debunk Internet scams with math 
Curriculum Tags: MDM4U
https://www.tiktok.com/@onlinekyne/video/6927725182358392069

@onlinekyne

Wanna win $1,000,000? There’s just a catch 🤔 #math #mathtiktok

♬ Monkeys Spinning Monkeys - Kevin MacLeod

Image Links

Who doesn't like a good tiling pattern
Curriculum Tags: All
https://twitter.com/pickover/status/1363262209879666688

Mathematics and beauty. Tiling with rhombs, 12-fold rotational symmetry. Source: https://t.co/VtDanSiKBM pic.twitter.com/N7EFuiieqp

— Cliff Pickover (@pickover) February 20, 2021

Some bar graphs about carbon emissions to have students analyze 
Curriculum Tags: Gr7, Gr8
https://twitter.com/bopinion/status/1363480803573985284

https://twitter.com/bopinion/status/1363478500628443140

If you use a proxy for a high-emissions grid, though, the picture changes substantially.

A car with a battery made in China and charged in Poland, where coal makes up about 2/3 of the electricity mix (like in China and India) emits 193 grams of CO2 per km https://t.co/Wj1Wp7qBYB pic.twitter.com/LDp7ggI57U

— Bloomberg Opinion (@bopinion) February 21, 2021

Carmakers’ emissions include the pollution their vehicles emit while they’re being driven.

Thanks to all the gasoline and diesel that gets burned over the lifetime of the cars they sell, Volkswagen is responsible for more emissions than oil producer Total https://t.co/Wj1Wp7qBYB pic.twitter.com/7Bo0fTwZzG

— Bloomberg Opinion (@bopinion) February 21, 2021

Math Links for Week Ending Feb 19th, 2021

Featured Links

I can't tell you how many times I need to have a math symbol in a regular text box (÷ √ ≤ ⇄). Thanks to @kevpluck for building a tool to help us do it and thanks to @GerardLewis for pointing this out. 
Curriculum Tags: All
https://symbolsalad.com/

Stuck in a GoogleSheet, Twitter or another program and can't get a Math/Chem Symbol (÷ √ ≤ ⇄)? @kevpluck created #SymbolSalad to easily copy/paste symbols into any text field. So simple! https://t.co/uKUuICTNHz #TimeSaver #IMAC #MathClub #edtech #mathchat #scichat pic.twitter.com/fE61N0N957

— Gerard Lewis, OCT (@GLewisOCT) February 17, 2021

Resource Links

A few weeks ago Desmos released an updated version of Central Park, and now they've updated Function Carnival. Now you can have these great activities with all the teacher dashboard features that exist now. 
Curriculum Tags: MCR3U, MCF3M, MHF4U
https://twitter.com/eluberoff/status/1360969642932662272

Function Carnival lives on! https://t.co/IMs7ghLcRd. Rebuilt in Activity Builder so that it now has all of our new features (snapshots, pacing, anonymize, assign-to-classes, etc). Also means you can now see behind the scenes and copy-and-edit.

— Eli Luberoff (@eluberoff) February 14, 2021

Video/Audio Links

Valentine's Day is over so keep this one for next year
Curriculum Tags: All
https://www.desmos.com/calculator/vojdj0xicn

Just keep sπnning, just
keep sπnning, keep sπnning with
me my #Mathentine. pic.twitter.com/sidZ3p0MNF

— Luke Walsh (@LukeSelfwalker) February 14, 2021

Though not typically a math based podcast, on a recent episode of Cyber, a cyber security expert talks about his first hack with a TI-83 calculator. I've added this to my list of math based podcasts (link below)
Curriculum Tags: MCR3U, MHF4U, MCV4U
http://ontariomath.blogspot.com/p/podcasts.html

A new bonus episode of the @OAMEtalks podcast with another preview from #OAME2021. This one featuring @RobertQBerry @LLB_315 @gfletchy @MrOrr_geek and @MathletePearce:

Curriculum Tags: All
https://talks.oame.on.ca/season-3

Image Links

Who knew that you could construct a heptagon using some parabolas?
Curriculum Tags: MPM2D, MCF3M, MCR3U
https://twitter.com/potetoichiro/status/1360811105442926592

【吃驚仰天！正七角形！？】
なな、なんと、円と２本の放物線の交点を結んで正七角形をつくることができるそうです。先ほど初めて知り私もやってみました。そして、その美しさに感動しました。松田康雄先生が発見し、2019年に算額が高見神社に奉納されたとのことです。いつか実物を見に行きたいです！ pic.twitter.com/VptFWHlpRl

— ポテト一郎🥔 (@potetoichiro) February 14, 2021

Even though factorial notation isn't a common notation for most grades, I still think you could introduce it and then let kids chew on this 
Curriculum Tags: All
https://twitter.com/fermatslibrary/status/1360952038155247617

Here's a prime pic.twitter.com/hp4DQOM1hv

— Fermat's Library (@fermatslibrary) February 14, 2021

    

Math Links for Week Ending Feb 12th, 2021

Featured Links

I really appreciate the time and care that @standupmaths puts into his videos. It's clear he must have done a lot of takes to get some of these shots and even though this may be a bit long, there is some great stuff here about probability and the binomial theorem plus if you have any kids interested in Minecraft then this might get them geeked. 
Curriculum Tags: MDM4U
https://www.youtube.com/watch?v=8Ko3TdPy0TU

Resource Links

Some great work from @Kurt_Salisbury on Quadratics, here are three interactive activities that takes you from quadratic relationships to parabolic motion. 
Curriculum Tags: MPM2D, MFM2P, MCR3U, MCF3M, MBF3C
https://kurtsalisbury.com/quadratics-part-1/

Quadratics are fun, even more fun in @desmos. Here are few more AB: https://t.co/oX64Wwi7c8 @AlgebraDesmos #iteachmath #mtbos pic.twitter.com/F1JHmMldaT

— Kurt Salisbury (@kurt_salisbury) February 10, 2021

I like when teachers create new tools that we can use in our own activities. In this case @TimBrzezinski has created this cool measurement tool in Desmos

Curriculum Tags: All
https://teacher.desmos.com/activitybuilder/custom/6025e479464b675c805039bb

Here, an easy-to-use @Desmos ruler that is BUILT TO SCALE. Ratio of ruler to coordinate plane = 1:1. 🙂 https://t.co/Ox87aTTzD3 @AlgebraDesmos @madewithDesmos @desmosbank #MTBoS #ITeachMath #math #mathchat #RemoteLearning pic.twitter.com/0R1pZIXz2s

— Tim Brzezinski (@TimBrzezinski) February 12, 2021

Audio/Video Links

I've recorded the first of three OAME 2021 preview episodes on the OAMEtalks podcast. This bonus episode features a preview from speakers including Ron Lancaster, @pi_lab, @GailBurrill, @marian_small and @ddmeyer. There is still time to register. 
Curriculum Tags: All
https://talks.oame.on.ca/season-3

I was bored and there was fresh snow and sun. But see if you can spot the mistakes when I created this Sierpinski's Triangle
Curriculum Tags: All
https://www.youtube.com/watch?v=pWuaRPVe2rc

Image Links

I think this is a great problem that could be done at many grade levels way into High School
Curriculum Tags: All
https://twitter.com/traciteacher/status/1360025224217985026

Taking @drrajshah's Maximum Product Math Treat on a #mathwalk today. #sandiegomath #sidewalkmath #MTBoS #iteachmath https://t.co/ubNaNJ7GkA pic.twitter.com/nxP2TAMVLI

— Traci Jackson (@traciteacher) February 12, 2021

Who doesn't like a climber made in the shape of a Klein bottle.
Curriculum Tags: All
https://twitter.com/kakifur23839165/status/1358224094647357441

クラインの壺を観測した pic.twitter.com/vUL1Aywexn

— Tsumoto🐒 (@kakifur23839165) February 7, 2021