Math Links for Week Ending Apr. 26th, 2019

Featured Links
Who doesn't want to have their very own Personal Polynomial?
Curriculum Tags: MHF4U
https://www.globalmathproject.org/personal-polynomial/

Resource Links
If you subscribe to the Thinking Classroom then you know the importance of creating visibly random groupings of students. That is, putting students in groups where they can clearly see that it is a random selection and not by any sort of criteria. So @sig225 has created some Excel Templates to help you put your students into these random groups relatively quickly
Curriculum Tags: All
https://continuousformation.blogspot.com/2019/04/visibly-random-grouping-in-excel.html

I've been playing with pattern blocks lately and I love all the new updates to the Mathies.ca. I particularly like how you can save your files and then have students upload them as starting places.
Curriculum Tags: Gr7, Gr8
https://twitter.com/davidpetro314/status/1119616192623157249

Can you use this virtual 21st century pattern block to continue to tile the plane? Download the file here:https://t.co/knQ2el29YM
Then upload it to the @ONmathies app https://t.co/v3l6BEt33T#mathchat #MTBoS #ITeachMath #MathArt @Trianglemancsd pic.twitter.com/YwvNWXJTaZ

— David Petro (@davidpetro314) April 20, 2019

I really don't know what to do with this yet but I can't ignore a set of data about where every reported location of human feces in San Fransisco. I'l figure something out. But here, take a look and interact
Curriculum Tags: MDM4U
https://twitter.com/lachlan/status/1120425646549864448

So @open_the_books mapped out every report of human feces on the streets of San Francisco since 2011 and uhhhhhh https://t.co/7t3Cocc6Qf pic.twitter.com/5B5sw8R3xC

— Lachlan Markay (@lachlan) April 22, 2019

Who knew that you could vote quadratically?
Curriculum Tags: MPM2D, MFM2P, MCR3U, MCF3M, MBF3C
https://twitter.com/mslawsonmath/status/1119426823530721281

Oh how excited I am that I'm in my Math 1 quadratic unit! I'll be sharing this Tuesday! #mtbos https://t.co/DMgmvK4I4p

— Ashley Lawson (@mslawsonmath) April 20, 2019

Video Links
When I was at NCTM, I went to @DanAndersod on creating graphing art and it was great. But recently he had got a new plotter and had his students code it to create some art. Make sure to click through to the thread in the link to see all the examples
Curriculum Tags: MCR3U, MHF4U
https://twitter.com/dandersod/status/1118924084610588672

Aren't these great? We're going to put them up in a display case and hopefully get more (and a more diverse set of) people in Java. Our next task is to make some interactive and dynamic sketches that will also display on the TV inside the display case. (here's another timelapse) pic.twitter.com/PkVI2bS9L9

— Dan Anderson (@dandersod) April 18, 2019

Image Links
I have been having so much fun with my new 21st Century Pattern blocks.
Curriculum Tags: Gr7, Gr8
https://twitter.com/davidpetro314/status/1120676092245893120

Starting to combine my 21st Century Pattern Blocks with traditional pattern blocks. What do you notice? What do you wonder? #mathchat #ITeachMath #MTBoS #mathart #wdyn #wdyw pic.twitter.com/CnvwXvBX5r

— David Petro (@davidpetro314) April 23, 2019

Need some data on favourite holidays?
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U
https://fivethirtyeight.com/features/new-years-is-americas-fourth-favorite-holiday/

Math Links for Week Ending Apr. 19th, 2019

Featured Links
Having a repertoire of good questions to ask students while interacting with them, while their are problem solving, sense making and all other mathematical thinking endeavours is super important. So it's @TracyZager to the rescue with this awesome resource of questions.
Curriculum Tags: All
http://tjzager.com/wp-content/uploads/2017/10/Printable-Intuition-Questions-.pdf



Resource Links
Thanks to @ddmeyer now you have a resource with all the handouts and links from NCTM2019. He scraped the web and put them in one easy to find place. And if you want, you can even download the whole 2+Gb resource.
Curriculum Tags: All
http://blog.mrmeyer.com/2019/handouts-slides-and-recordings-from-nctmsd2019/

Now that @Desmos has Collections, people are starting to share their collections. Here's one from @Mr_Stadel that includes all his puzzle activities.
Curriculum Tags: All
https://teacher.desmos.com/collection/5cb0fa767db9630c766a83d5

Here's a simple activity on transforming radical functions
Curriculum Tags: MCF3M, MCR3U
https://twitter.com/pejorgens/status/1117910602993688578

d147 #teach180 Radicals back to back. We informally describe graphs changing partners. We share what was helpful. These graphs have a starting point. On 4&5, what happens when I turn off the top graph? On 6 what if I change the 4 to -4? @desmos https://t.co/ucq9orUO5u #iteachmath pic.twitter.com/syJvorxsEp

— Paul Jorgens (@pejorgens) April 15, 2019

Here's a simple idea to have your students investigate properties of quadratic relations. Look at the "reverse" relationship
Curriculum Tags: MPM2D, MCF3M, MCR3U
https://twitter.com/MrNiksMathClass/status/1118826645996093440

In these four problems, students are asked to investigate the relationship between the roots of functions which have the same coefficients, but are written in the reverse order. pic.twitter.com/GmDQFLHU6C

— Math with P. Nik (@MrNiksMathClass) April 18, 2019

I blogged about this site the first time in 2014. You basically start with two points and create either a circle or a line segment. You then have several geometric challenges to complete in the fewest moves. Thanks to @MathTeachScholl for reminding me of this. 
Curriculum Tags: All
http://sciencevsmagic.net/geo/

Image Links
Need a bar graph and want to include probability? Here's an idea
Curriculum Tags: Gr7, Gr8
https://twitter.com/DonFraser9/status/1118940898748878848

Gave up my nap to create the bar graph ... What do you Notice/Wonder? Is this exciting or what? What problems could the students create to go with the graph ?? ⁦⁦@d_martin05⁩ ⁦@DrMaryReid⁩ ⁦@MaryBourassa⁩ ⁦@davidpetro314⁩ pic.twitter.com/eFBPH8V9ip

— Don Fraser (@DonFraser9) April 18, 2019

Some linear humor for you
Curriculum Tags: MPM1D, MFM2P
https://twitter.com/centerofmath/status/1119259366471892993

Mathematical directions for a mathematical concert! #funfriday #DOMATH pic.twitter.com/uBr9noVvbb

— Center of Math (@centerofmath) April 19, 2019

I just purchased a new set of 21st Century Pattern Blocks from @trianglemancsd's site Talking Math with your Kids. They are totally fun and they work with regular pattern blocks too.
Curriculum Tags:All
https://twitter.com/davidpetro314/status/1119072424786399232

What do you do when you get your first set of 21st Century Pattern Blocks from @Trianglemancsd ‘s Talking Math With Your Kids shop? You try to use all 7 dozen pieces to make a thing. https://t.co/6PbSDTqUf1 #mathchat #mathart #MTBoS #ITeachMath pic.twitter.com/31hJ5tAyQY

— David Petro (@davidpetro314) April 19, 2019

And now the Hexagons
Curriculum Tags: All
https://twitter.com/davidpetro314/status/1119420619974565890

#hexagons using all 7 dozen 21st century pattern blocks https://t.co/6PbSDTqUf1 #mathchat #MTBoS #iTeachMath #mathart pic.twitter.com/asHNivnMSz

— David Petro (@davidpetro314) April 20, 2019

Math Links for Week Ending Apr. 12th, 2019

Featured Links
Seriously, ths Desmos sketch is awesome. Click on the link in the Tweet if you want to see the inner workings
Curriculum Tags:MHF4U, MCV4U
https://twitter.com/SweenWSweens/status/1116443315749179397

Dandelion in the Breeze - Some Desmos graph art to celebrate Spring! https://t.co/MUl8uzZrrh #Mathart #desmos pic.twitter.com/eLhKYT0ZCq

— Sean Sweeney (@SweenWSweens) April 11, 2019

Resource Links
Looking for some resources on Rich Tasks? The @MathforLove has your back. He's got a lot of new resources on his new site on the importance of rich tasks. There are videos and free lessons. Take a look.
Curriculum Tags: All
https://mathspathway.com/media-library/

Opinion Links
A reminder that much of what we do in school does not relate to real life.
Curriculum Tags: All
https://twitter.com/robertkaplinsky/status/1115710613689257984

Here's my 3 sentence blog post:

1) Word problems do not exist in real life outside of school.

2) We teach students strategies for solving word problems like Three reads and CUBES.

3) Students will never use strategies like Three reads or CUBES in real life outside of school.

— Robert Kaplinsky (@robertkaplinsky) April 9, 2019

Article Links
I think this is a good article from @FiveThirtyEight about how they treat probabilities. A good read for any senior class.
Curriculum Tags: MDM4U
https://fivethirtyeight.com/features/when-we-say-70-percent-it-really-means-70-percent/?ex_cid=story-twitter

Video Links
A new one from @mathisvisual on visualizing solving one step equations. Follow the link to get the descriptions of all the steps.
Curriculum Tags: Gr7
http://mathisvisual.com/one-step-equations/

Last week I was in San Diego for NCTM and while there I got around the city riding these electric scooters that were literally sprinkled all over the city. Well @MrOrr_Geek and @mathletepearce made a little mini 3 act task dealing with them
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://twitter.com/MrOrr_geek/status/1116386313345884160

While at #NCTMSD2019 @MathletePearce and I were obsessed with scooters from @lyft so we made a 3 Act Task. WDYN? WDYW? #mtbos #iTeachmath Some liberties were taken in creation @MatthewOldridge @MrsNewell22 @kathyhen_ @jocedage @drrajshah @gfletchy @davidpetro314 @robertkaplinsky pic.twitter.com/gXDK6jS0A0

— Jon Orr (@MrOrr_geek) April 11, 2019

Image Links
A super fun Venn Diagram for you
Curriculum Tags: All
https://twitter.com/simongerman600/status/1036368175305244675

Straight from reddit comes his hilarious Venn diagram. pic.twitter.com/PBCFM5J6Up

— Simon Kuestenmacher (@simongerman600) September 2, 2018

A new one from @GHSMaths
Curriculum Tags:All
https://twitter.com/GHSMaths/status/1115375666218831872

Three-armed spiral tessellations, based on the work of @RobFathauerArt (https://t.co/aGo85NisDS).https://t.co/UgXXcYn8X0#mathart pic.twitter.com/QbJOSNwwE2

— Martin Holtham (@GHSMaths) April 8, 2019

A couple of new ones from @MonaChalabi on the effect of skin colour on school suspensions
Curriculum Tags: MDM4U
https://www.instagram.com/p/BwCtC4znI6K/

View this post on Instagram

Do you know what colorism is? It’s the kitchen staff who are darker than the people out front waiting tables. It’s my family members hoping their kids will be light-skinned. And it’s here, in the US school system. Using data from The National Longitudinal Survey of Youth, US sociologists found a clear correlation between how dark a student’s skin is and the probability that they would be suspended. I found this part of the study important: “The disadvantage for darker-skinned young men derives from their link to a disfavored group (criminals) in an analogous way that the disadvantage for young women does (unfeminine and unattractive).” The researchers note that there’s a lot of discretion when it comes to how the school system punishes small offenses (like talking loudly) and darker skinned pupils suffer disproportionately. They note that future research should look at Hispanic communities too (I would add all poc communities to that list!) Source: Lance Hannon et al, Race and Social Problems, 2013 The Guardian has a special series all this week on colorism edited by Dream McClinton that I highly recommend!

A post shared by Mona Chalabi (@monachalabi) on Apr 9, 2019 at 9:55am PDT

And the other one on the effect of skin colour on average hourly wages.
Curriculum Tags: MDM4U
https://www.instagram.com/p/BwKROlsHaN_/

View this post on Instagram

Colorism affects how much money you earn... Economics professors studied the wages of men aged 19–65 who were working, not self-employed, and earning less than $100k per year. They found that those with lighter skin earned more. Source: Arthur H. Goldsmith et al, The Journal of Human Resources 42(4), 2007

A post shared by Mona Chalabi (@monachalabi) on Apr 12, 2019 at 8:26am PDT

Math Links for Week Ending Apr. 5th, 2019

Featured Links
I am at NCTM this week in San Diego so I think just about everything will be NCTM-centric and so that's why this is a day late. First up, I presented a session called "Data Looks Pretty Good" which was all about interesting data sets that you can look at and/or analyze (using Desmos or CODAP). The slideshow is full to the brim with data sets and extra links enough to keep anyone busy.
Curriculum Tags: MDM4U, MBF3C, MAP4C
http://bit.ly/nctm2019petro

Resource Links
Two brand new Desmos features for Activity Builder. First, now you can upload live pictures of student work (eg. that they are doing at their desk on paper) and upload it to your teacher dashboard. Basically what happens is that while  you are in Snapshots you can click a button to email you a special link that will let you upload photos from your phone. Secondly, we can finally organize our favourite activities by creating a Collection. You can create as many collections as you want and add any activity to more than one collection.
Curriculum Tags: All

Finally a way to organize your @Desmos Activities. Use Collections. Just launched this morning. Try it out at https://t.co/yVt0MvZWJy #mtbos #MathChat #ITeachMath #NCTMSD2019 pic.twitter.com/BhOkKDDVjx

— David Petro (@davidpetro314) April 3, 2019

There was a lot of sessions discussing ideas around equity and one that I saw was from @LBmathemagician. She spoke about (de)tracking students and I think her talk can be best summed up by @RobertKaplinski's tweet.
Curriculum Tags: All
http://bit.ly/DetrackingLNB

"I don't think we've achieved equity for all. We achieved equity for more, and we have a lot more work to do." - @LBmathemagician. I am blown away by by her presentation! Absolutely fantastic speaker and meaningful #NCTMSD2019

— Robert Kaplinsky (@robertkaplinsky) April 4, 2019

I didn't get to this session from @IanKerr_math, @McCormick_Math, and @rweychert but thanks to @Approx_Normal I found out about it. Check out her Twitter thread. Just the hearing about the new (to me) sports stats sites was good enough (Swish 2.0, Spotrac & Statsbomb - plus one that I recently found out about and mentioned in my above talk, Baseball Savant). Make sure you follow the whole thread.
Curriculum Tags: MBF3C, MAP4C, MDM4U
https://twitter.com/approx_normal/status/1113847412651462657

Sports analytics with @IanKerr_math @McCormick_Math @rweychert #NCTMSD2019 pic.twitter.com/26w61vSyKk

— ~Hedge~ (@approx_normal) April 4, 2019

So I have always admired @Dandersod's  http://dailydesmos.com/ site from afar thinking that I couldn't do those things but I went to his session and low and behold, it's not that hard. You can try the Desmos activity here and see for yourself and check the link below for all the other resources.
Curriculum Tags: All
http://bit.ly/makingmathart




I saw @mathgarden's session about his and @cbrownLmath new book Math Recess. It's their view that we have to do more playing with math and the book is full of examples how. And as an added bonus, I got a mention in the book because I like to use the word "tinker" with math. Check it out.
Curriculum Tags: All
https://www.amazon.ca/Math-Recess-Playful-Learning-Disruption/dp/1948334100/ref=sr_1_fkmrnull_1?crid=2E5IC34F7EFBT&keywords=math+recess+singh&qid=1554605826&s=gateway&sprefix=math+recess%2Caps%2C187&sr=8-1-fkmrnull


Video Links
I was just blown away by the short session by Stephen Clower (who is blind) and @shapeoperator about how Desmos is helping the visually impaired. Watch and listen to the video below to see how.
Curriculum Tags: All
https://twitter.com/davidpetro314/status/1113960382056488960

Check out Stephen Clower (& @shapeoperator )letting us listen to accessibility features for the visually impaired on @Desmos check out their talk notes at https://t.co/rks8whvoyB and listen on your own below #mathchat #mtbos #lteachmath #NCTMSD2019 pic.twitter.com/UfORJnTPnf

— David Petro (@davidpetro314) April 5, 2019

I really loved @MathButler and @MrsNewell22's session on Desmos geometry. Lots of great ideas and simple tweaks to what you're already doing.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
http://bit.ly/nctm19-geometry

There was this and more in @MathButler and @MrsNewell22 's session on Geometry at #NCTMSD2019 . Get this visual trapezoid area proof and other geometry goodness herehttps://t.co/eLasrnfgqF#mathchat #MTBoS #IteachMath pic.twitter.com/LMpJisxFEH

— David Petro (@davidpetro314) April 5, 2019

Image Links
Some great ideas from @saravdwerf
Curriculum Tags: All
https://saravanderwerf.com/


I realize this is just a picture but I hope you can get the gist of it. To practice dilations you just need two rubber bands.
Curriculum Tags: Gr7, Gr8
https://twitter.com/davidpetro314/status/1114189338697273344

Love this way to have kids draw dilations from @MrVaudrey & @VbergMath use 2 rubber bands tied with a knot. Hold one end with your finger and the other with the pencil. Stretch them out and use the knot to trace out your original image. #nctmSD2019 #mathchat #MTBoS #iteachmath pic.twitter.com/VfyZ4mEYIZ

— David Petro (@davidpetro314) April 5, 2019

Check out these two slides from @mathematize4all about students with dyslexia and dyscalculia. The stories from @dylanmlynn and @gelada of how they overcame their LD issues to become awesome mathematicians were great.
Curriculum Tags: All
https://twitter.com/davidpetro314/status/1114292678319939584

Worried about LDs? Check out the strengths of those with #dyslexia and #dyscalculia and how they support mathematical thinking via @mathematize4all & @Gelada at #nctmSD2019 #mathchat #MTBoS #iteachMath pic.twitter.com/b1Lhq7iQKN

— David Petro (@davidpetro314) April 5, 2019

Here's a great strategy from @Mr_Stadel to help get kids talking
Curriculum Tags: All
https://twitter.com/davidpetro314/status/1114570269543108608

Get students talking to each other using the Campfire strategy. @mr_stadel says give them these prompts and let them discuss at #nctmsd2019 #mathchat #mtbos #iTeachMath pic.twitter.com/d4FcaJl0aR

— David Petro (@davidpetro314) April 6, 2019

It was great to meet @MrsNewell22 and hear about her #MathGals shirts. You should totally get one (or four). The proceeds are all donated so it's totally worthwhile
Curriculum Tags: All
https://twitter.com/MrsNewell22/status/1114155915815469062

If you need a #MathGals shirt in your life, find one here! (Bonus: 15% off now until April 9th!) https://t.co/GmnrQRSrfd

— Chrissy Newell (@MrsNewell22) April 5, 2019

Some math related pictures I took while at NCTM:
Curriculum Tags: Gr7, Gr8
https://www.instagram.com/p/Bv4UnACHqFF/
https://www.instagram.com/p/Bv5LoitHP6v/
https://www.instagram.com/p/Bv7CvGBH_ii/

View this post on Instagram

What do you notice ? What do you #wonder ?

A post shared by David Petro (@lookimyourfather) on Apr 5, 2019 at 9:09am PDT

View this post on Instagram

#circular lights

A post shared by David Petro (@lookimyourfather) on Apr 5, 2019 at 5:10pm PDT

View this post on Instagram

Is this a #disco #tessellation ?

A post shared by David Petro (@lookimyourfather) on Apr 6, 2019 at 10:30am PDT