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

 

Math Links for Week Ending Dec 11th, 2020

Featured Links

Awesome work from @MathTechCoach to get kids ready for the Christmas season. Whether you are teaching face to face or virtual, this one slide Desmos Challenge creator is a fun way to talk about transformations by making a virtual snowflake
Curriculum Tags: All
https://twitter.com/MathTechCoach/status/1335277681471086592

These #Snowflakes are very cool. If you want to use this with your classes, this one allows you to change colors. https://t.co/vgaZ3dDaLr

This is is just black and white (which is mighty cool) https://t.co/pqQhJ20Lhk pic.twitter.com/vIHHClexht

— Steve Phelps (@MathTechCoach) December 5, 2020

Resource Links

I have always really loved the data set of deaths and survivors from the Titanic sinking. When dealing with percents, data and inferences it's a great data set and the folks at Desmos have Desmosified it. Try it out and you won't be disappointed. 
Curriculum Tags: Gr7, Gr8, MDM4U
https://blog.desmos.com/articles/desmosify-finding-associations/

Video Links

This was such an odd math mistake. There was a foot note on the paper indicated by a super script 4 and she thought that was the power of 4. Sheesh
Curriculum Tags: All
https://twitter.com/bobloch/status/1336689958787149831

Hey, did you see that last night's Powerball numbers were DIFFERENT from last weeks? There's a 1 in 280 million-squared chance of that happening - they must be doing something to those poor ping balls - it's fraud I tell ya!
Some very dangerous math mis-application here. https://t.co/a6qAAL4eaG

— Bob Lochel (@bobloch) December 9, 2020

Image Links

Using data in sports is getting more popular but it's hard to fight against tradition
Curriculum Tags: MDM4U
https://fivethirtyeight.com/features/why-are-we-still-returning-kicks-in-college-football/

Math Links for Week Ending Dec 4th, 2020

Featured Links

So @JReulbach is the queen of assessment with Desmos and as you may have seen here, I have been dabbling in Desmos self assessment tasks and thanks to Julie, I now know that there is a pile of other people who have been creating them too. Julie has been collecting them all on this post and you can add your own too by submitting them on the Google Form
Curriculum Tags: All
https://ispeakmath.org/desmos-self-checking-activity-builders/

If you are looking for self-checking or assessment @Desmos activities, here is a collection. Also, if you made one, please add it to the Google Form. :) https://t.co/XaLjLbboJl

— Julie (@jreulbach) November 27, 2020

Resource Links

If you are looking for and example of how you can't hide from data. In this case, it's that C19 is real and people sometimes don't even realize they have it. That is, the large portion of complaints about scented candles (likely caused by loss of smell) shows how wide spread C19 is. Make sure you look at the thread for all the info.
Curriculum Tags: MDM4U
https://twitter.com/kate_ptrv/status/1332398737604431874

I couldn’t just walk past this Tweet, so here is some fun #dataviz

Scented candles: An unexpected victim of the COVID-19 pandemic 1/n https://t.co/xEmCTQn9sA pic.twitter.com/tVecEiX5Jc

— Kate Petrova (@kate_ptrv) November 27, 2020

New styles available on the @Desmos graphing calculator
Curriculum Tags: All

https://twitter.com/Desmos/status/1333921570914508801

✨ GLOW UP YOUR GRAPHS ✨

🎁 New colors!
🎁 New styles!
🎁 New editor!

Click and hold down on any graphed expression to start styling!https://t.co/aPyN7BofNX pic.twitter.com/uYQ4DqCQ8h

— Desmos.com (@Desmos) December 1, 2020

In my school, the game Among Us is super popular. So this Desmos activity from @Kurt_Salisbury takes that and Desmosifies it (with about a thousand lines of code). In it students "play" Among Us and solve some mathematical challenges with points, slope and solving equations. Very cool. 
Curriculum Tags: MPM1D, MFM1P
https://twitter.com/kurt_salisbury/status/1334263146685534209

Shhhhhh! @AlgebraDesmos #mtbos #iteachmath #retrodesmos 🕹🕹 🕹

Check out this @Desmos activity: Equations Among Us!! https://t.co/I3fHZPxiW5

— Kurt Salisbury (@kurt_salisbury) December 2, 2020

Here's a cool webinar on snowflake art and symmetry from @Stecks. If you have ever seen her work, it's pretty cool. Check out her @numberphile video on creating letters with a single cut. Just make a donation and check it out. Thanks to @KMarkPet for pointing this one out
Curriculum Tags: All
https://www.eventbrite.co.uk/e/snowflakes-symmetry-maths-art-workshop-18-tickets-128649428905

Video/Audio Links

Yup, I agree - Zeno's Paradox
Curriculum Tags: MCV4U
https://twitter.com/bobloch/status/1332681130865254400

Zeno's Paradox in the wild. https://t.co/vKqva8c22Q

— Bob Lochel (@bobloch) November 28, 2020

I had a great talk with Ian VanderBurgh in this month's @OAMEtalks podcast. He's doing his OAME members only webinar on "Adventures in Problem Solving" We talked about that and other things like the creation process of the @CEMC_Waterloo math contests. 
Curriculum Tags: All
https://talks.oame.on.ca/season-3

Image Links

Why didn't I think of this for trig identities?
Curriculum Tags: MHF4U, MCR3U
https://twitter.com/panlepan/status/1334948834837934080

Isn't that cute ? pic.twitter.com/H1Dwq9haYz

— Vincent Pantal🍩ni (@panlepan) December 4, 2020

    

Math Links for Week Ending Nov 27th, 2020

Featured Links
With coding being explicitly part of the new math curriculum here in Ontario, it's always good to have places to go for resources and ideas
Curriculum Tags: Gr7, Gr8
https://twitter.com/learningcode/status/1331644580698189825

Our annual Canada Learning Code Week starts on December 1! Learn a new coding concept by completing a #clcWeek activity and enter our contest for a chance to win a prize pack (valued at $950).For more details and to register: https://t.co/9sncvg9JXI pic.twitter.com/H4PHJQlZNF

— Canada Learning Code (@learningcode) November 25, 2020

Resource Links
Mathematical origami is a great place to take your kids for some fun spatial reasoning. 
Curriculum Tags: All
https://twitter.com/alisonkiddle/status/1330074013675216896

There are various instructions available online... https://t.co/PoZZuyClsV shows how to make the 30 modules and I found https://t.co/Mbdu57i3Jy really useful for putting it together!

— Alison Kiddle (@alisonkiddle) November 21, 2020

I like when teachers are simple but creative about what they do in classes. In this case @FawnPNguyen has a nice idea of how to run her test reviews. "To review for it, I need you to look through the ten problems on this paper. You’re more than welcome to work on the questions, but you don’t have to, not for me anyway. I need you to just examine them enough to identify two questions on there that you feel confident about, that you have no problem solving them. Then, I need you to identify two questions that you would like to get help on most. That’s it."
Curriculum Tags: All
http://fawnnguyen.com/reviewing-for-a-test/

Video Links

If you are looking for some examples of where formulas are used in real life then you might like @'s channel. In this video there are several calculations used to show the effectiveness of using equations to get things done
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://www.youtube.com/watch?v=NYvKxsYFqO8

Image Links

Here is a great prompt to deal with fraction operations. 
Curriculum Tags: Gr7, Gr8
https://twitter.com/MarkChubb3/status/1332050483133952000

“1 white rod is worth 1/5

Make an image worth 20”

What would you ask Ss as you walk past?

This is based on what YOU notice and what YOU wonder about you kids’ work and thinking!#MTBoS #iteachmath pic.twitter.com/4yUyMKFifu

— Mark Chubb (@MarkChubb3) November 26, 2020

More Pythagorean puzzles from @JamesTanton
Curriculum Tags: Gr8, MPM1D, MFM1P
https://twitter.com/jamestanton/status/1330481718315380737

No power of 2 is the hypotenuse of a right integer triangle. (Thus neither is any power of 4.) All powers of 5 are hypotenuse values. Is there an integer right triangle with hypotenuse a power of 3? (A power of 6? 7?) pic.twitter.com/OkM0PGl2w3

— James Tanton (@jamestanton) November 22, 2020

      

Math Links for Week Ending Nov 20th, 2020

Featured Links
I really appreciate these long form videos from @StandUpMaths about election fraud and (my favourite) Benford's law. 
Curriculum Tags: MDM4U
https://www.youtube.com/watch?v=etx0k1nLn78
https://www.youtube.com/watch?v=aokNwKx7gM8

Resource Links

I have mentioned #SlowRevealGraphs before but it's worth mentioning again. It's a nice structure to get kids talking about Data Management topics. With this one from @JennaLaib we are looking at an infographic of wealth distribution in Toronto. 
Curriculum Tags: Gr7, Gr8, MDM4U
https://slowrevealgraphs.com/2020/10/26/income-inequality-in-toronto/

Video/Audio Links
It's always fun to watch @AnnieK_P create
Curriculum Tags: All
https://twitter.com/anniek_p/status/1327707566936367107
https://twitter.com/anniek_p/status/1327760269397942273

Some Isometric Hitomezashi. #MathArtChallenge cc @maths_kath pic.twitter.com/EgI1cdJbJY

— Annie Perkins (@anniek_p) November 14, 2020

Honestly a fairly unexpected result. And halfway stage, too. See next tweet for still pictures. #MathArt pic.twitter.com/YZJ6DV3rY7

— Annie Perkins (@anniek_p) November 14, 2020

Nice dynamic tessellation 
Curriculum Tags: Gr7
https://twitter.com/KangarooPhysics/status/1327674314808832000

pic.twitter.com/MZm5GDZlOu

— Daniel Piker (@KangarooPhysics) November 14, 2020

@Radiolab does their take on why Benford's law doesn't suggest there is election fraud and their original episode on Benford's law was tried to use as evidence that there was. 
Curriculum Tags: MDM4U
https://www.wnycstudios.org/podcasts/radiolab/articles/breaking-benford

Image Links
Some reference diagrams for teaching circle trig
Curriculum Tags: MCR3U
https://twitter.com/SegarRogers/status/1327923982796992512

Made diagrams for teaching circle-trigonometry procedures. i.e. avoiding ratios altogether. Interested in whether this is a good idea, a ridiculous idea (maybe!), potential problems further down the line, etc.@jamestanton @malcoad @AshDolan6451 @LiEmers @samanthajmch pic.twitter.com/VMAPLh5kE5

— Segar Rogers (@SegarRogers) November 15, 2020

Why not use what you have to model the area of a circle?

Curriculum Tags: Gr7
https://twitter.com/howie_hua/status/1326349817761558529

We're deriving area formulas so I asked my students "What do you notice?" with these Laughing Cow cheese wedges. pic.twitter.com/oVkoEceY4b

— Howie Hua (@howie_hua) November 11, 2020

    

Math Links for Week Ending Nov. 13th, 2020

Featured Links

Last week was #BlackInMathWeek and the participation was awesome on Twitter. Check out that hashtag and the #BlackInMathRollCall hashtags for all the great Tweets
Curriculum Tags: All
https://twitter.com/hashtag/BlackInMathWeek?src=hashtag_click&f=live
https://twitter.com/hashtag/BlackInMathRollCall?src=hashtag_click&f=live

It's officially #BlackInMathWeek!!! Which means it's time for introductions!!! Tell us about who you are and where you're at using the hashtag #BlackInMathRollCall!!! And tag us @BlackInMath! pic.twitter.com/pslES4dsvs

— Black In Math (@BlackInMath) November 8, 2020

Resource Links

In this post @FawnPNguyen takes three "classic" math starters and tweaks them giving them fresh legs. Take a look. 
Curriculum Tags:All
http://fawnnguyen.com/changing-up-popular-warm-up-routines/

Last week I shared some of my resources from the @MakeMathMoments virtual conference and now @SaraVDWerf is sharing some of hers as well as resources from CMC South. You can always count on Sara to have great stuff. 
Curriculum Tags: All
https://www.saravanderwerf.com/cmc-south-make-math-moments-virtual-summit-resources/

Video Links

Oh man, who doesn't like and infinite fractal?
Curriculum Tags: All
https://twitter.com/pickover/status/1325989613211619328

Let's look inside a fractal Menger sponge. https://t.co/MTpfl91UJ5 pic.twitter.com/kSlTMN7K7v

— Cliff Pickover (@pickover) November 10, 2020

It is problematic that so many people profess being bad at math. We have a lot of work to do
Curriculum Tags: All

https://twitter.com/Jason_To/status/1324922564100190208

For crying out loud please teach kids to be flexible with numbers and strategies or else they grow up, say they’re terrible at math 🙄 and just act the fool on TV https://t.co/sgX9JMkNmH

— Jason To (@Jason_To) November 7, 2020

Image Links

You can always count on @JamesTanton to give us a prompt to help us think about inequalities in such a fun way
Curriculum Tags: MHF4U
https://twitter.com/jamestanton/status/1326879298914054146

A favorite: Can you place the numbers 1 through 8 in the boxes shown and respect the inequality between each pair of neighboring boxes? If so, how many different solutions are there? [More generally, do puzzles like these always have at least one solution?] pic.twitter.com/ZQNCeD82M9

— James Tanton (@jamestanton) November 12, 2020