Math Links for Week Ending Jan 29th, 2021

Featured Links

It's a great story of the work that the math department has done over at Glebe Collegiate over the years in the realm of the thinking classroom. Check it all out on the Ministry of Ed's site on high impact instruction. 
Curriculum Tags: All
https://www.dcp.edu.gov.on.ca/en/learning/high-impact-instructional-practices-in-mathematics-resource-and-supports

High Impact Instructional Practices in Mathematics.
Humbled to have had the opportunity to share our journey of change. So many people to thank for so many reasons. You all are the best.#onted #MTBoS #iteachmath #thinkingclassroom
https://t.co/7f5bCC9PlV

— Alex Overwijk (@AlexOverwijk) January 25, 2021

Resource Links

You can never have too many Calculus resources and why not one from over a hundred years ago
Curriculum Tags: MCV4U
http://djm.cc/library/Calculus_Made_Easy_Thompson.pdf

How a book written in 1910 could teach you calculus better than several books of today [Calculus Made Easy, 1910 - full text pdf: https://t.co/W4gspJoGQc] pic.twitter.com/jfGUCdJuDv

— Massimo (@Rainmaker1973) January 27, 2021

It's @DonFraser9 giving us a topical prompt dealing with percents
Curriculum Tags: Gr7, Gr8
https://twitter.com/DonFraser9/status/1354586439296684032

Pfizer says that you can get 6 doses rather than 5 doses from one vial
IF SO, isn’t that a 20% increase in doses from one vial ? Sounds good for the millions waiting ...#MTBoS @davidpetro314 @drcathybruce @MaryBourassa @MathletePearce @Bedford_Mrs @Mathgarden @JRappaport27

— Don Fraser (@DonFraser9) January 28, 2021

Video Links

I appreciate that this is not just a "trick" but @HowieHua also explains why it works
Curriculum Tags: Gr7, Gr8
https://twitter.com/howie_hua/status/1354254262168023040

New TikTok video: My favorite way to multiply by 11 and why it works pic.twitter.com/Z9rhNBRpxq

— Howie Hua (@howie_hua) January 27, 2021

Image Links

It's @DonFraser9 giving us some practice with number sense and basketball 
Curriculum Tags: Gr7, Gr8
https://twitter.com/DonFraser9/status/1353783284749230080

Breaking NUMBER SENSE News

21% of NBA games have been
decided by 20 points or more !

Did it happen this weekend ? #MTBoS ⁦@DanShuster⁩ ⁦@AlexOverwijk⁩ ⁦@MatthewOldridge⁩ ⁦@davidpetro314⁩ ⁦@JRappaport27⁩ ⁦@MathletePearce⁩ ⁦@FSlimati⁩ pic.twitter.com/3lqY7YLCuY

— Don Fraser (@DonFraser9) January 25, 2021

A couple of good prompts with dice from @MarkChubb3
Curriculum Tags: Gr7, Gr8
https://twitter.com/MarkChubb3/status/1354204035482583040

https://twitter.com/MarkChubb3/status/1354139125654441985

Look at a die on an angle and you can see 3 faces at a time.

What’s the average number of pips (dots) you should see??#iteachmath pic.twitter.com/iyuec3hzbO

— Mark Chubb (@MarkChubb3) January 26, 2021

What do you notice?
What do you wonder?#noticewonder pic.twitter.com/xJeKpYwA06

— Mark Chubb (@MarkChubb3) January 26, 2021

Featured Links

     

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 Jan 15th, 2021

Featured Links
One of the nice things about the Twitter math community is some of the discussions that pop up. Here @JRappaport27 poses a question and the discussion follows. Take a look
Curriculum Tags: All
https://twitter.com/JRappaport27/status/1350059727955308547

I spend a lot of time debunking for folks many myths about mathematics and mathematics education. I’m wondering if there was one myth (and yes there are many) worth educating folks on, what might that be? #iteachmath #MTBoS #onted pic.twitter.com/PX9os21N7V

— Jordan Rappaport (@JRappaport27) January 15, 2021

Resource Links

She had me at her first line "". When people ask me about why people blog I tell them this very thing. But beyond that, here are some tips on Google Classroom, @Desmos, grading and more. 
Curriculum Tags: All
http://www.mathycathy.com/blog/2021/01/reflect-and-share-workflow/

...Workflows have become more important than ever, and I’ve come to realize that workflows can vary greatly even when folks use the exact same tools.
More thoughts here:
Reflect and Share: Workflow | MathyCathy's Blog https://t.co/aOMUsxisDq via @mathycathy #iteachmath #MTBoS pic.twitter.com/7vE8h4Tp2D

— Cathy Yenca (@mathycathy) January 14, 2021

And speaking of grading, @Wheeler_Laura has some tips collected from all over Twitter.  
Curriculum Tags: All
https://mslwheeler.wordpress.com/2021/01/12/grading-tips-for-efficiency-aka-why-the-twitter-community-is-so-awesome/

New blog post up: Grading Tips for Efficiency (aka why the Twitter community is so awesome) https://t.co/NoebY1W2E7 #EdChat pic.twitter.com/7MvDzIo4gd

— Laura Wheeler (@wheeler_laura) January 12, 2021

Article Links
Math in the Navajo nation
Curriculum Tags: All
https://twitter.com/maanow/status/1348426952085024768

"Mathematics is in our blood,” says Henry Fowler, associate professor of mathematics at @NavajoTech. Learn how mathematicians in the Navajo nation are using their deep connection to the subject to inspire future #IndigenousInSTEM professionals: https://t.co/JjrxNlDbC5 pic.twitter.com/TpRRriX0yZ

— MAA (@maanow) January 11, 2021

Persistence matters. 
Curriculum Tags: All
https://twitter.com/maanow/status/1349159482807496705

Although mathematics is a centuries-old discipline, new breakthroughs are made every day! Take Dr. Neena Gupta, the youngest person to ever receive the Shanti Swarup Bhatnagar Prize for solving a problem that has puzzled mathematicians for 70 years. https://t.co/htFPbptYRX

— MAA (@maanow) January 13, 2021

Video Links
#MathArt for the win
Curriculum Tags: All
https://twitter.com/Ayliean/status/1347688943073058818

I spend my life trying to *show* people Maths.

Here are some of my art highlights from the past 4 years (in one minute)
Nerd up! 🤓💗 pic.twitter.com/2O31GfS7Sw

— Ayliean (@Ayliean) January 8, 2021

That time on the Tonight Show when math was the star
Curriculum Tags: All
https://twitter.com/stevenstrogatz/status/1349159125901598721

Computer scientists love “hat problems“. Besides being fun, they also have deep applications in coding theory, as explained here: https://t.co/hmgBn0KY6n. Johnny Carson once tried to explain a three hat problem on his show. Enjoy! (ht ⁦@dhjshi_shi⁩ ) https://t.co/AZZ4KzaPwr

— Steven Strogatz (@stevenstrogatz) January 13, 2021

Image Links
Sometimes unit conversion makes sense
Curriculum Tags: All

Student answer on a mathematics test. pic.twitter.com/FzVJH3CV6F

— Cliff Pickover (@pickover) January 13, 2021

Math Links for Week Ending Jan. 8th, 2021

Featured Links

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

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

— Mona Chalabi (@MonaChalabi) January 5, 2021

Resource Links

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

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

Article Links

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

Video Links

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

Image Links

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

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

— Haseeb Awan (@Wakil_Sayb) December 24, 2020

     

Math Links for Week Ending Jan 1st, 2021

Featured Links

It's the first day of the year so it isn't surprising there are some "best of" things floating around. So how about some of the best or interesting visualizations of the year. The first one comes from the Flowing Data site (and not all the visualizations are about Covid 19). And then of course Five Thirty Eight has their compilation of weird visualizations for the year. 
Curriculum Tags: MDM4U
https://flowingdata.com/2020/12/23/best-data-visualization-projects-of-2020/
https://fivethirtyeight.com/features/the-40-weirdest-and-best-charts-we-made-in-2020/?ex_cid=538twitter

The 40 weirdest (and best) charts we made in this long, strange year: https://t.co/ksp9kDaA6h

— FiveThirtyEight (@FiveThirtyEight) December 29, 2020

 

Resource Links

Who doesn't like tessellated cookies?
Curriculum Tags: All
https://www.atlasobscura.com/articles/best-christmas-cookie-cutter

The Satisfaction of Mathematically Efficient Christmas Cookies: @atlasobscura https://t.co/dB4GzmygdR #MTBoS #iteachmath #wismath

— Jennifer Lawler (@jenniferklawler) December 26, 2020

Having some classic virtual games is a great way to bring out some mathematical thinking from students. Connect 4, Trouble, Chess, Checkers (and not so traditional like multiplication Tic Tac Toe) as Google Slides and other game ideas can be found in this Edutopia article and also Shut the Box from @AliceKeelor
Curriculum Tags: All

https://www.edutopia.org/article/13-virtual-games-play-your-elementary-classroom
https://twitter.com/alicekeeler/status/1342822352594329600

Shut the Box Game – Google Slides - https://t.co/PN9fWPlmvG pic.twitter.com/pmWayIVdA8

— Alice Keeler (@alicekeeler) December 26, 2020

It's always good to have the stories of mathematics
Curriculum Tags: All
https://www.theguardian.com/society/2020/nov/19/gladys-west-the-hidden-figure-who-helped-invent-gps

Do you use GPS? Take a moment to read about Gladys West, a trailblazer whose programming work set the foundation for the GPS orbit and revolutionized technology: https://t.co/OOFVoeA7G8 #Diversity #WomenInSTEM #BlackInMath pic.twitter.com/RRiVohz9UG

— MAA (@maanow) December 29, 2020

Opinion Links

Though she claims it may be an unpopular opinion, I feel like more and more people are coming around the the idea of the fact that multiplication tables don't have to be memorized. Yes we want to have kids know their tables but by some sort of internalization, not rote memorization. Here's more from @Dean_of_Math
Curriculum Tags: All
https://deanofmath.wordpress.com/2020/12/26/unpopular-opinion-1-kids-dont-need-to-memorize-their-multiplication-facts/

Unpopular opinion 1: Kids don’t need to memorize their multiplication facts. https://t.co/4Tu3m2LYpb

— Melissa D (@Dean_of_math) December 26, 2020 

Video/Audio Links

A new @Desmos animation from @SumDumThumb
Curriculum Tags: All
https://twitter.com/SumDumThum/status/1342183856800223239

https://t.co/cTq4p2muvY pic.twitter.com/pUY6nZpzzD

— Andrew Osborne (@SumDumThum) December 24, 2020

A new episode of the @OAMEtalks podcast has @TaraCFlynn and @ShelleyYearley talking about their upcoming webinar "Unit Fractions Unlock Learning!". OAME members can register for the webinar for free. 
Curriculum Tags: Gr7, Gr8
https://talks.oame.on.ca/season-3

Image Links

A Christmas themed pattern puzzle from @JamesTanton
Curriculum Tags: All
https://twitter.com/jamestanton/status/1342476455066759168

60 trees in a row. Their stars are yellow,orange,blue,Y,O,B,Y,O,B,... Their pots are orange,yellow,pink,blue,O,Y,P,B,O,Y,P,B,... Their baubles are mauve,pink,yellow,blue,orange,M,P,Y,B,O,M,P,Y,B,O,...
Must there be an all yellow tree? All B? One with star=O, pot=O, baubles=M? pic.twitter.com/VSnGYtNQVU

— James Tanton (@jamestanton) December 25, 2020

Do you want more info on the mathematics of snowflakes. Symmetry and more at the link below
Curriculum Tags: All
https://www.goodnewsnetwork.org/the-mathematics-of-snowflakes/

If no two snowflakes are the same, why is the shape so easily identifiable? @umanitoba researcher Ranganathan Padmanabhan explains the mathematics behind the classic snowflake shape ❄️ https://t.co/5Nd8D9ZgT0 pic.twitter.com/knenbK8iWR

— MAA (@maanow) December 26, 2020

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

Math Links for Week Ending Dec. 18th, 2020

Featured Links 

I really love this visual from @AledaKlassen about triangulation of assessment reminding us that assessment isn't just writing tests. Thanks to @HTheijsmeijer for this one 
Curriculum Tags: All
https://twitter.com/HTheijsmeijer/status/1338566586677014530

THIS!!
How are students showing us what they know? How are they, formally and informally, demonstrating their knowledge? Does "COP" collection of evidence have to look the same for every student? No!
Thank you, @aledaklassen! @OMCAmath pic.twitter.com/NohMMGKtQV

— Heather Theijsmeijer (@HTheijsmeijer) December 14, 2020

Resource Links 

It seems that @Kurt_Salisbury has been knocking it out of the park lately with the @Desmos activities. A couple of weeks ago he had an Among Us activity and this week he's turned @SaraVDWerf's 5x5 game. I like how it keeps score for the class. It's great for a starter game in any class.  Check it out. 
Curriculum Tags: All
https://twitter.com/kurt_salisbury/status/1339348097063940096

I think it is good to go. A modified version of @saravdwerf 5X5 game. Thanks for all who tested. Let me know if you find issues. #iteachmath #mtbos

Check out this @Desmos activity: 5 X 5 Number Game! https://t.co/ORgSyJAbu9

— Kurt Salisbury (@kurt_salisbury) December 16, 2020

There has been a lot of assessment based Desmos activities revolving around assessment and here @LW has actually created a plugin for Chrome that strips the info out of the summary page and throws it into a csv file. Very cool stuff. 

Curriculum Tags: All

https://twitter.com/lwThinking/status/1339734644934111232 

I made this little extension. Maybe it can help some folks. Let me know if you find bugs or want features. https://t.co/qlE4gefwu5

— Mx. Gregory Epstein (@lwThinking) December 18, 2020

Video Links 

Leave it to @Von_Oy to come up with such an elegant looking @Desmos graph in under 80 lines of code. 
Curriculum Tags: All
https://twitter.com/von_Oy/status/1339053988398895104

I made something fluttery... https://t.co/uBnc6z6bUm#mathart with @Desmos pic.twitter.com/vV468kZnr1

— Suzanne von Oy (@von_Oy) December 16, 2020

Image Links 

Now that's a lot of snow. Here's an image that could be used for imperial/metric unit conversions. 
Thanks to @Joe_Sisco for this one
Curriculum Tags: Gr7, Gr8
https://twitter.com/sayakasofiamori/status/1339884908236271616

Numerous #snowfall records have been broken in #Japan, with the top being 219cm in Fujiwara. If there’s 200cm of wet snow on a 100 square meter (1,070 square feet) roof, it would weigh 60 tons. That’s like 400 sumo wrestlers sitting on top of a house🇯🇵 pic.twitter.com/KREHECdrCs

— Sayaka Mori (@sayakasofiamori) December 18, 2020