Math Links for Week Ending Jun. 11, 2021

Featured Links

Welp it's here. The new Ontario Gr9 math curriculum. Well the rational and the expectations at least. The supports are still being written. But you can check out the new expectations and the new strands (they follow more closely from elementary) on the Ministry's new digital site. There are also videos and supports for the change to destreamed. Of course if you just want to get to the expectations directly, go here. And don't forget the docs about what the changes are and the alignment with grade 7&8 in the resources section.
Curriculum Tags: MTN1W (note the new course code)
https://www.dcp.edu.gov.on.ca/en/curriculum/secondary-mathematics

Resource Links

One of the nice things about being part of the online math community is how people share. In this case, @GLewisOCT has created some great supports for the new math curriculum including a nice checklist and compact version of the expectations. 
Curriculum Tags: MTH1W
https://twitter.com/GLewisOCT/status/1402995741564444680

Website update!🤩I've created the #Grade9 #Destreamed #MTH1W Complete Curriculum Checklist and Condensed One-Page Summary. Resources will be added when available. #mathchat #OntEd #edtech LINK🔗: https://t.co/uXe06f5Wlv @realJ_Mitchell @Jason_To pic.twitter.com/DtDk2zbp2w

— Gerard Lewis, OCT (@GLewisOCT) June 10, 2021

Looking for some things to read this summer? Many of these I've mentioned before but it's nice to see them all in one place.
Curriculum Tags: All
https://twitter.com/MrValencia24/status/1400562105179377664

If you are a math educator looking for a good summer read, here are some highly recommended options 🙂📚📖#MTBoS #ITeachMath #MathEd #MathChat @JSEllenberg @misterwootube @Kit_Yates_Maths pic.twitter.com/aAhxfxmeR5

— Libo Valencia (@MrValencia24) June 3, 2021

Are you looking to do some playful math? Look no further than this post. It is chock full and you can learn to create a blog carnival to boot. 
Curriculum Tags:All
https://findthefactors.com/2021/06/07/yes-you-can-host-a-playful-math-education-blog-carnival/

Yes, YOU Can Host a Playful Math Education Blog Carnival https://t.co/Wf9wmIorJh

— Iva Sallay (@findthefactors) June 8, 2021

Who can't use a good dice game
Curriculum Tags: Gr7, Gr8
https://twitter.com/mathequalslove/status/1401645893267427329

Tic Tac Toe Dice Gamehttps://t.co/KRJzDpShzK #mtbos #iteachmath pic.twitter.com/yXDDYgO2Kc

— Sarah Carter (@mathequalslove) June 6, 2021

And here's another 

Curriculum Tags: Gr7, Gr8
https://twitter.com/mburnsmath/status/1400839994185420801

For info about how to play Two Dice Sums, why it's one of my favorites, & why the S didn't make an effective choice: https://t.co/1gWrBZkco8 https://t.co/otHLHmpXsn pic.twitter.com/vVoQ0KJUOr

— Marilyn Burns (@mburnsmath) June 4, 2021

And here is @MSBJacobs PolyPad version
Curriculum Tags:Gr7, Gr8

https://twitter.com/msbjacobs/status/1400860678282526721

I have just created a version of this wonderful game using Polypad from @MathigonOrg https://t.co/ZwuCnCgTCi
Maybe it's something that could be used if students are working at home?

— Michael Jacobs (@msbjacobs) June 4, 2021

And speaking of Mathigon, they now have added all of the irregular pentagons that tessellate. 
Curriculum Tags:All

https://twitter.com/MathigonOrg/status/1400815166124703750

Regular pentagons don’t tessellate, but there are 15 types of irregular pentagons that do – the last of which was only discovered in 2015. We just added all of them to Polypad: can you fit them together? https://t.co/m87MbfNgMi pic.twitter.com/RSRplNflbN

— Mathigon (@MathigonOrg) June 4, 2021

And if you need something to do in the last 20 days of math for gr 1-8 then @SCDSBMath has your back
Curriculum Tags: All
https://twitter.com/GLewisOCT/status/1400852816822943753

Our friends at @scdsbmath impress yet again! Here's the #Last20Days to consolidate math skills and strategies. 👏 Thanks @jacableSCDSB @kitluce1 @kaililynn for your effort, organization, and gorgeous design! #SCDSBLast20 #mathchat #edtech #OntEd 🔗LINK: https://t.co/xENXawHN7L pic.twitter.com/M5fz0TVLDM

— Gerard Lewis, OCT (@GLewisOCT) June 4, 2021

Video Links

Some mathematical philosophy from @Veritasium
Curriculum Tags: All
https://www.youtube.com/watch?v=HeQX2HjkcNo

Image Links

Data is everywhere
Curriculum Tags: MDM4U
https://twitter.com/simongerman600/status/1178112180891336704

I love this picture! The contents of a single firetruck spread out. Including six fire fighters. I consider this a map of the contents of the firetruck. Source: https://t.co/OJpiwoc8Gk pic.twitter.com/IqlTJBtTy0

— Simon Kuestenmacher (@simongerman600) September 29, 2019

Math Links for Week Ending May 22nd, 2020

Featured Links
With all of the data floating around about Covid-19 it's hard to find just the right one to use in your class. Well last week this data showed up all over my Twitter feed and it's a great example of "how to lie with statistics". And just for fun, I took the graph and re arranged it to chronological order. Since then the Georgia officials have walked it back. But still it's a great example to open discussions with your students.
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U
https://news.yahoo.com/georgias-coronavirus-numbers-made-reopening-183733274.html

What do you notice & wonder? I saw this graph (now corrected) & couldn’t help but think about the meaningful discussions to be had in a math class. Data Literacy is a critical skill our Ss need in order to make sense of the world. #mtbos #iteachmath #forsythpln #learningtransfer pic.twitter.com/JJQfz0L9Sd

— Kayla Floyd Duncan (@MrsKaylaDuncan) May 18, 2020

Chronological version:

Resource Links
In this long blogpost @ChrisHunter36 does a great job of connecting Indigenous art to patterning and beyond.
Curriculum Tags: Gr7, Gr8
https://reflectionsinthewhy.wordpress.com/2020/05/21/two-legged-four-legged-winged-finned-patterns-from-indigenous-art/




If you are looking for something for you (or your students) to do while we are learning from home, I strongly suggest @Anniek_P's daily #MathArt challenges. As I type this, she is at Day 66. They are for humans who have all levels of artistic and mathematical ability. Check them out
Curriculum Tags: All
https://arbitrarilyclose.com/




Video Links
Last week I shared the latest post from @SaraVDWerf about her Green Sheets. Here is a quick summary of what those are from Sara herself.
Curriculum Tags: All
https://www.youtube.com/watch?v=alhi5lvSMxg

Fractals are beautiful from any angle
Curriculum Tags: All
https://twitter.com/matthen2/status/1261872991668809729

surprising patterns from slicing the Menger sponge fractal pic.twitter.com/2kW4pcH8Ty

— Matt Henderson (@matthen2) May 17, 2020

And the response in @Desmos from @SumDumThum
Curriculum Tags: All
https://twitter.com/SumDumThum/status/1262224459789824000

Graphed it in desmos, though it wasn't too keen on cooperating.https://t.co/jJUiI1Fyz8 pic.twitter.com/TCtAhyCPcK

— Andrew Osborne (@SumDumThum) May 18, 2020

A nice circle/midpoint triangle theorem by @GHSMaths done in @Desmos.
Curriculum Tags: MPM2D
https://twitter.com/GHSMaths/status/1262194328337874945

The Nine-Point Circle

Construct a circle through the midpoints of the three sides of a triangle.

This circle also passes through the foot of each altitude and the midpoints of the line segments from each vertex to the point where the altitudes meet.https://t.co/pHyJhOgu7A pic.twitter.com/XuWAtBBhJA

— Martin Holtham (@GHSMaths) May 18, 2020

Nice visual proof for this infinite series.
Curriculum Tags: MCR3U
https://twitter.com/Nereide/status/1263456710959783937

A visual proof that 1/4 + 1/16 + 1/64 + 1/256 … = 1/3

Creation by @matthen2

Source➡️https://t.co/NdvJk6xNzN

This infinite series was used by Archimedes circa 250–200 BC.
It's a geometric series with first term 1/4 and common ratio 1/4.#iteachmath#mtbos #mtmschat#maths pic.twitter.com/kAwSi7Ynbx

— Nereide (@Nereide) May 21, 2020

If you have ever done the Ball Bounce experiment then you might consider this video as a teaser or an extension.
Curriculum Tags: MPM1D, MFM1P, MDM4U
https://www.youtube.com/watch?v=EbjG8S6Xr_I

Image Links
Thank you TV for providing a nice math question
Curriculum Tags: All
https://twitter.com/MathByTheMt/status/1262089071347683329

I was watching TV last night and this was a great math question that came up! How would YOU solve it? Show me below!! #iteachmath #mtbos pic.twitter.com/AZFWQsrEAg

— Audrey, Math by the Mountain (@MathByTheMt) May 17, 2020

Math Links for Week Ending May 1st, 2020

Featured Links
Although I don't often repeat posts, because I am helping with the organization here, I am taking some licences and reminding people that our virtual math conference is happening starting Wednesday and there are over 3000 people already signed up. OAME 2020 Virtual features 30 live sessions and over 20 pre recorded sessions on May 6-9th. When you register you will be registering for the conference but not picking sessions. We will just be sending you links each day for the day's sessions. The conference is free to all but the recordings (both live and pre recorded) will only be open to the public until the following Monday. Check out the full program and get registration details at the link below
Curriculum Tags: All
http://oame2020.ca/virtual-oame

Resource Links
I know I have been posting a lot of @Desmos stuff lately but I know that people are looking for things they can use online and I think that the ability to comment and watch what kids are doing in realtime then it's a great tool. That being said, here is an activity that I created to help kids develop an understanding of fraction division without directly telling them. And as a bonus, it's self checking and there is a Challenge Creator so students can create their own devision problem for the rest of the class to try out.
Curriculum Tags: Gr7, Gr8
https://engaging-math.blogspot.com/p/desmos-activities_10.html


Some great tips from @JReulbach on things you can do at home to hack together a studio for making videos. And I highly recommend the same stylus she's suggesting. I use the same one.
Curriculum Tags: All
https://ispeakmath.org/2020/04/23/ipad-palm-rejection-hack-an-awesome-cheap-stylus/


Opinion Links 
I am a fan of good information and in this post, @RobertKaplinski is telling us about some of his favourite non fiction books that are not about education that every teacher should read. And I have read four of five but my fav from the list is Made to Stick. I wouldn't miss it.
Curriculum tags: All
https://robertkaplinsky.com/5-non-education-books-all-education-leaders-should-read/



Video Links
I totally love this video from @StandupMaths and @FryRSquared about the dangers of false positives. This was recorded last December but it's totally topical now where there is talk of the accuracy of Covid tests.
Curriculum Tags: MDM4U
https://www.youtube.com/watch?v=vBPFaM-0pI8

And I love how I can finally watch @FryRSquared's Full Christmas lecture now on probability
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U
https://www.youtube.com/watch?v=_q4DrUHKC0Q

And on Algorithms
Curriculum Tags: All
https://www.youtube.com/watch?v=TtisQ9yZ2zo

And on Math's limits
Curriculum Tags: All
https://www.youtube.com/watch?v=u5mNa6KE0lA

Image Links
This is just one link but check out all of the geometry and drawing challenges that @Anniek_P has posed. Some great stuff for when your stuck at home
Curriculum Tags: All
https://arbitrarilyclose.com/2020/05/01/mathartchallenge-day-45-the-lotfallah-mosque-dome/

Math Links for Week Ending Jan. 10th, 2020

Featured Links
It looks like @MrDeltaMath has been busy. If you have not ever looked at his site, you are really missing something that could help your students work through problems. In this case he's gone through geometry proofs but there are so many other dynamic solutions on this site for other math topics it won't matter what you (or your students) are looking for and as a bonus, it's free.
Curriculum Tags: All
https://www.deltamath.com/

Happy to announce that I have finished the Geometry Proofs section on DeltaMath. It took 7 months, but I manually created & inputted 350 unique proofs and students can prove any way they choose. Lots of scaffolded modules too. Please share w/ Geometry teachers! #iteachmath #mtbos pic.twitter.com/o4HQoNAN3R

— Zach Korzyk (@MrDeltaMath) January 9, 2020

Resource Links
This is a fairly simple set of slides from @LukeSelfwalker students are asked to choose the smallest number from the list that no one else has chosen. The display of the class's data shows up as a dot & box and whisker plot. There could be a lot of places for discussion here. From the strategy for choosing a value to the way the data is organized.
Curriculum Tags: MDM4U
https://teacher.desmos.com/activitybuilder/custom/5e13ffc10199f84025da77a8

For a day oneish type of activity, I created a few slides of "Pick the smallest number that no one else picks." The idea is bring up how student engagement is vital to our daily classroom activities and how we can learn from what other people contribute.https://t.co/CCE33jteLI pic.twitter.com/Bed4ev27Zj

— Luke Walsh (@LukeSelfwalker) January 7, 2020

Here's another great one from @LukeSelfwalker. This time its estimating radian angles. Such simple but effective practice and I like how he has students reflect at the end on how much they have done.
Curriculum Tags: MHF4U
https://teacher.desmos.com/activitybuilder/custom/5e10b733de57050e8d7b9c9f

5 different slides for practicing angle measurements on the unit circle. I purposefully chose not to track how many are correct. Starting to think how correctness during practice is privacy for students.https://t.co/04vrPnjiNG pic.twitter.com/ST6Qxg11RF

— Luke Walsh (@LukeSelfwalker) January 7, 2020

I am a big fan of simple games that help reinforce math concepts. In this case it's probability based with this simple sum game with two dice. @MBurnsMath does a great job of explaining it and despite the fact that it starts out as an activity for grade 2 students, there are definitely ways to have older students use it as a math starter. Thanks to @MarkChubb3 for pointing out this one.
Curriculum Tags:  Gr7, Gr8
http://www.marilynburnsmathblog.com/one-of-my-all-time-favorite-games/

Though this activity from @mathface22 is long, it provides lots of practice and for students who are learning to sketch polynomial functions. I like how it allows you to trace out the function you think represents the equation and then shows you the correct graph.
Curriculum Tags: MHF4U
https://teacher.desmos.com/activitybuilder/custom/5e0a41c10279c6341abf838c

There is a new activity released from @Desmos to introduce the idea of dilations. Only 8 slides but nice and interactive as you would expect.
Curriculum Tags: Gr7
https://teacher.desmos.com/activitybuilder/custom/5e13560bbefb180dcd92d427

💖 NEW ACTIVITY FRIDAY 💖

Play around with the dilation machines in Sketchy Dilations!https://t.co/lG88JSuAS2 pic.twitter.com/w8o1Oml9qY

— Desmos.com (@Desmos) January 10, 2020

Video Links
Looking for help in creating your own @Desmos Activities? Then check out @MJFenton's webinar on that very topic.
Curriculum Tags: All
https://www.youtube.com/watch?v=fxHCihwDCiI

Image Links
Even though most of these are politically based, there are some nice ones that are not
Curriculum Tags: MDM4U
https://fivethirtyeight.com/features/the-56-best-and-weirdest-charts-we-made-in-2019/

Math Links for Week Ending Jan. 3rd, 2019

Featured Links
I really loved this story from @CraigFayComedy on the @storycollider about living with #dyscalculia (and he still became an engineer). Something every #math teacher should hear
Curriculum Tags: All
https://www.storycollider.org/stories/2019/11/5/late-diagnosis-stories-about-being-diagnosed-as-an-adult


Resource Links
It's good to have more activities to help with probability. So this is a nice little activity from @Giohio to facilitate this.
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U
https://www.desmos.com/calculator/wnlneoawbk

Enjoy this @Desmos "Would you rather?" @DailyDesmos @madewithDesmos @AlgebraDesmos https://t.co/3dlptF9LOH pic.twitter.com/qahlG7QOZw

— Steve Phelps (@giohio) January 3, 2020

Here @RobertKaplinski gives the low down on what Open Middle problems are and how you could use them
Curriculum Tags: All
https://www.edutopia.org/article/getting-heart-what-students-know-math

Educator @robertkaplinsky shares a way to structure math problems to assess students' *conceptual* understanding.https://t.co/JFGT6wnx3t

— edutopia (@edutopia) January 2, 2020

I have been cleaning up some of my @Desmos activities for release. The first one is to help students with tessellations
Curriculum Tags: Gr7
https://engaging-math.blogspot.com/p/desmos-activities_10.html

[Updated Post] Have students practice finding #tessellations and then create their own for the rest of the class to find with this @Desmos activity (with Challenge Creator)https://t.co/JUNFclEWlI#mathchat #MTBoS #ITeachMath pic.twitter.com/LmBQCGyEPT

— David Petro (@davidpetro314) January 4, 2020

The next ones are for practicing completing linear patterns given a numerical beginning of various patterns.
Curriculum Tags: Gr7, Gr8
https://engaging-math.blogspot.com/p/desmos-activities_10.html

[Updated Post] Students practice working with linear patterns given a few numerical values by completing the table and graphing the points with this @Desmos activity (with Challenge Creator) that self checks student work. https://t.co/JUNFclEWlI#mathchat #MTBoS #ITeachMath pic.twitter.com/A5uCdu6HXA

— David Petro (@davidpetro314) January 4, 2020

And the last one is for practicing subtraction of integers
Curriculum Tags: Gr7, Gr8
https://engaging-math.blogspot.com/p/desmos-activities_10.html

[Updated Post] Students can practice (self checking) basic subtraction of integers questions and then create their own for the rest of the class to solve with this @Desmos (with Challenge Creator) Activity.https://t.co/JUNFclEWlI#mathchat #MTBoS #ITeachMath pic.twitter.com/U0UqbNCjn2

— David Petro (@davidpetro314) January 4, 2020

Video/Audio Links
Here's a great idea to help students have fun with linear functions, or quadratic functions or any polynomial function.
Curriculum Tags: MPM1D, MFM2P, MPM2D, MCR3U, MBF3C, MCF3M, MHF4U
https://www.youtube.com/watch?v=K54ildEW9-Q

Here is a new podcast from @OAMEtalks. This month featuring @KanekaTurner giving a preview of her upcoming webinar "Lesson Structure and Routines that Foster Agency and Equity"
Curriculum Tags: All
https://talks.oame.on.ca/season-2





Image Links
Some Happy New Year math
Curriculum Tags: All
https://twitter.com/MathsEdIdeas/status/1211664354669735936

Math up your countdown to 2020... #HappyNewYear #HappyNewYear2020 #maths #math pic.twitter.com/wLnxBBZiVo

— Maths Ed (@MathsEdIdeas) December 30, 2019

And some more New Year Math. Thanks to Mark Garant for this one.
Curriculum Tags: MHF4U

Math Links for Week Ending Sept. 20th, 2019

Featured Links
I really like this opinion piece from @MathforLove. In it he talks about the idea that everyone can do math. There he says: "...everyone has the capacity to learn the foundational mathematics that allow them to understand and participate in our world” and lays out these three points of his thesis:

1. Everyone is capable of mathematical literacy.
2. Everyone deserves to see some beautiful ideas of mathematics.
3. A great mathematician can come from anywhere.

Read more at the link below. This also reminded me of @AliceAspinal's children's book "Everyone can learn math"
Curriculum Tags: All

Resource Links
Are you looking for some ideas about math related board games. Well, @SheriWalker72 asked that question on Twitter and got a bunch of great responses. Make sure look look at the comments to get some ideas.
Curriculum Tags: All
https://twitter.com/SheriWalker72/status/1172462223152812032

Hey #MTBoS , I'm looking for suggestions on what to buy for a classroom. What are your favourite board games? We are hoping they have some math in them.

— Sheri Walker (@SheriWalker72) September 13, 2019

OAME 2020 is accepting proposals for speakers for their May 7-8, 2020 conference. Have you got a great idea for a session? Then sign up at the link below.
Curriculum Tags: All
https://sites.google.com/oame.on.ca/oame2020/presenters







I like the extensions that @MaryBourassa has used to @SaraVDwerf's Name tents. The idea of checking in on your students in an informal way throughout the year is a great way to keep them on your side. Check out how she does it at this link:
Curriculum Tags:All
http://marybourassa.blogspot.com/2019/09/keeping-conversation-going.html


Video Links
Another nice animation made with @Desmos from @GHSMaths
Curriculum Tags: All
https://twitter.com/GHSMaths/status/1173312236045164544

Triangle pilehttps://t.co/O8EK0fo6Fs#mathart pic.twitter.com/YBajOyKzZD

— Martin Holtham (@GHSMaths) September 15, 2019

Image Links
A nice visual pattern
Curriculum Tags: Gr7, Gr8
https://twitter.com/MarkChubb3/status/1174492314754060288

My next colour will be red.

How many will I need?#iteachmath #mtbos pic.twitter.com/kR4o8dJ5g9

— Mark Chubb (@MarkChubb3) September 19, 2019

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 July 6th, 2018

I have been doing a lot with Desmos Geometry lately, including things with tessellations and that appears to be what their latest blog post is about. There are some fun examples within so try not to play for too long
Curriculum Tags: Gr7
http://blog.desmos.com/post/175384214302/friday-fave-for-june-29

Do you need some help with Desmos, well @marybourassa presented at the Exeter Academy recently had has all kinds of tips and tricks available on her latest blog post.
Curriculum Tags: All
http://marybourassa.blogspot.com/2018/06/desmos-at-exeter-2018.html




Some fun with transformations (and Obama)
Curriculum Tags: Gr7, Gr8
https://twitter.com/LukeSelfwalker/status/1013956335044612096

Wana play around with a linear transformation of Poly-Obama? Just move the i and j vectors to find the matrix you like the best. https://t.co/2Hi0Mzz54z#mathart pic.twitter.com/OgYKqNynS9

— Luke Walsh (@LukeSelfwalker) July 3, 2018

"Maria Agnesi, the Greatest Female Mathematician You've Never Heard of"
Curriculum Tags: All
https://www.scientificamerican.com/article/maria-agnesi-the-greatest-female-mathematician-youve-never-heard-of/

From @MrOrr_Geek, some advice on the paradigm that often, in a classroom, you are hurrying up ro killing time. His solution ? Have you heard of Desmos? Specifically Activity Builder.
Curriculum Tags: All
https://mrorr-isageek.com/hurry/

Of course the world cup is going on and @standupmaths has you covered with the number of possible outcomes for any team. Some tree diagrams, powers, and combinatorics can be found here.
Curriculum Tags: Gr7, Gr8, MDM4U
https://www.youtube.com/watch?v=btcVNMA7hYI

Who doesn't like a physical example of a square root?
Curriculum Tags: All
https://twitter.com/rinahyland/status/1013946117099282433

Enjoying square roots, summer version. pic.twitter.com/zjv7kDEsNh

— Rina Hyland (@rinahyland) July 3, 2018

A poem from @mathgarden on what success in mathematics could be
Curriculum Tags: All
https://twitter.com/Mathgarden/status/1014566561770700800

If we think "Student Success" can be found in a grade, a number, or in a rubric, then we need to rethink what "success" means...or maybe, realize that "success" itself is a superficial benchmark for learning mathematics... pic.twitter.com/ewytL5Xzi3

— Sunil Singh (@Mathgarden) July 4, 2018

This Fibonacci based kinetic sculpture is coo. Thanks to @bardprincess for pointing this one out. Check the link out for more info.
Curriculum Tags: All
http://www.thisiscolossal.com/2018/07/kinetic-sculpture-based-on-the-fibonacci-sequence/

A reminder that the real world doesn't often match up to our math classes.
Curriculum Tags: All
https://twitter.com/ddmeyer/status/1015296170803859456

Holy non-linear ice cream pricing, math batman. pic.twitter.com/nDcBJsjpt9

— Dan Meyer (@ddmeyer) July 6, 2018

Math Links for Week Ending Nov. 10th, 2017

This week was the OAME Leadership Conference in Ottawa and @PGLiljedahl was the keynote. It was great to hear about all of his research on how to build a thinking classroom first hand. There were a lot of points that he clarified about pulling it off. In the image here you can see a summary of the main things you need to do and the best practices for doing them (based on research). You can get the slide deck for his presentation at the link below and see the back channel here.
Curriculum Tags: All
http://www.peterliljedahl.com/presentations

You can also see @wheeler_laura's Sketchnote below
https://twitter.com/wheeler_laura/status/929003274891677697

Keynote by @pgliljedahl - Building a Thinking Classroom #OAMElead #VNPS #VRG #MTBoS #iTeachMath pic.twitter.com/4fBsNQh8tY

— Laura Wheeler (@wheeler_laura) November 10, 2017

and neat video of a pile of us using Vertical Non-Permanent Surfaces from @MJacobs
https://twitter.com/msbjacobs/status/929012412581404673

What a roomful of educators learning together really looks like. @pgliljedahl #OAMELead pic.twitter.com/7n9HyF3oxP

— Michael Jacobs (@msbjacobs) November 10, 2017

I tell a lot of teachers about Desmos Activity builder and sometimes it's hard to get the idea across. However, @JRuelbackh has created a really nice activity for teachers to go through as a student in order to see what features exist on Activity Builder. So if you have teacher who you think may benefit from this, send them to her blog post about using Activity Builder in other disciplines and try it out yourself right here.
Curriculum Tags: All
https://ispeakmath.org/2017/10/22/desmos-activity-builder-for-all-disciplines/



In this Desmos activity @MathyCathy asks: Is it Linear? Is it Parallel? Is it Perpendicular? all using card sorts. She also has a paper/pencil version. Either way this makes a nice consolidation activity for students.
Curriculum Tags: MPM1D
http://www.mathycathy.com/blog/2017/10/is-it-parallel-using-desmos-card-sorts-to-extend-student-thinking/






I don't think this is a new problem but it was nice to be reminded of it by @mathforlove where he talks about it as a great way to get kids to step out of their comfort zone by taking chances with their guesses. The puzzle is the 2-4-6 puzzle where students have to guess the rule for those numbers.
Curriculum Tags: All
https://mathforlove.com/2017/10/overcoming-confirmation-bias-with-the-2-4-6-puzzle/

This is a neat use for PowerPoint developed by @SteveWyborney. The premiss simple: You would like to have an image of some three dimensional shape made of cubes. Now you can take his slideshow template and just click on any one of the cubes and choose delete to remove it from all six images. Or right click on an cube to change its colour. This doesn't work for like a typical PPT. It is meant to give you a printable template but was created with PPT. In fact, each cube or piece of cube is actually made up of an entire cube you can move around. Download the slideshow and try it for yourself.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM2P
http://www.stevewyborney.com/?p=1106

Some fun geometry stuff with Smarties (we call them Rockets in Canada) from @vihartvihart.
Curriculum Tags: Gr7, Gr8
https://www.youtube.com/watch?v=4orZQ9Z0WL4

I was lucky enough to attend @JoBoalar's 2 day workshop at Stanford this week. Lots of great growth mindset stuff and the release of this new video on the problems with labelling a student as gifted.
Curriculum Tags: All
https://www.youcubed.org/rethinking-giftedness-film/
Rethinking Giftedness from YouCubed on Vimeo.

One of the slides I liked in @joboaler's presentation was this one about what to do instead of standard homework
Curriculum Tags: All
https://twitter.com/davidpetro314/status/927591142362927104

Replace homework with these questions via @joboaler & @YouCubedOrg #mathchat #iTeachMath #MTBoS pic.twitter.com/xArEYdw48n

— David Petro (@davidpetro314) November 6, 2017

Some Noticing and Wondering when I was in San Fransisco
Curriculum Tags: Gr7, Gr8
https://twitter.com/davidpetro314/status/926864874487058437

What so you notice, what do you wonder? #mathchat #MTBoS #iTeachMath pic.twitter.com/dwtXNygYl9

— David Petro (@davidpetro314) November 4, 2017

And some more Noticing and Wondering from San Fransisco
Curriculum Tags: Gr7 Gr8, MPM1D, MFM1P, MFM2P, MPM2D
https://twitter.com/davidpetro314/status/926979022751285248

What do you notice? What do you wonder? #mathchat #MTBoS #iTeachMath pic.twitter.com/sPMEeQB9yi

— David Petro (@davidpetro314) November 5, 2017

You can never have too many WODBs. This one on percent and ratios from @BAnderson02
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://banderson02.wordpress.com/2017/10/23/ratio-wodb/

I loved this image from @MarkChubb3 on triangular prisms
Curriculum Tags: Gr7
https://twitter.com/MarkChubb3/status/925000033073815553

Some of these are nets of triangular prisms. Some are not.

Pick one you know will/won’t work. #spatialreasoning #iteachmath @ReidDwight pic.twitter.com/hiT2kfu4Sq

— Mark Chubb (@MarkChubb3) October 30, 2017

Some fun fraction stuff here
Curriculum Tags: Gr7, Gr8
https://twitter.com/ChrisHunter36/status/928071710418468865

How many? #unitchat #fractionchat @Trianglemancsd @314Piman @NatBanting @Pierre_Tranche https://t.co/AQRjza66ZV pic.twitter.com/C6gvIJXQ0G

— Chris Hunter (@ChrisHunter36) November 8, 2017

Math Links for Week Ending Oct 24th, 2014

When I saw this I thought it was great. We have done such a good job of mechanizing the solution process for students that they no longer try to make sense of the actual problems we give. In this video 32 students are asked the question "There are 125 sheep and 5 dogs in a flock. How old is the shepherd?" Only a quarter of the students asked actually understood that this was unsolvable in its current form. The rest gave a numerical answer. It was originally discussed in a paper in 1993. This video is from Robert Kaplinsky but the blog post below expands on it further. The issue is that most students (about 75%) will try to do some math with this non sensical question. That is, most do not make sense of the question, they just assume they have to do some math and just try to hammer it out regardless of how realistic it is. I think everyone should try this experiment in their classes and see what your students do. If you get similar results then I think that only confirms what I suspect. That we do a good job of creating robot math students who really don't think about what they are doing.
Curriculum Tags: All
http://tjzager.wordpress.com/2014/10/18/making-sense/

This kind of took the Internet by storm this week. Just released, Photomath boasts the ability to look a mathematical expression, recognize what it is saying and then simplify and solve it. If it works then this will drastically change how we assign homework. The problem is that it doesn't work all the time. Sometimes it doesn't recognize symbols other times it actually gets the math wrong. Watch the video below to see what it is supposed to do. It looks pretty impressive. Well I tried to test this thing out with the expressions seen on the right. For the most part it did alright, it calculated the answer then show the steps (though not always the most efficient steps). However, for the last question, it interpreted the question correctly then started solving it correctly but then the wheels quickly fell off when it dropped a bracket and interpreted a 2 in front of the missing bracket as the whole number 2 (as in a mixed fraction) instead of multiplying by 2. Thus getting the wrong answer. You can see Dan Meyer's post on this with a good discussion in the comments including my comment (#15) with images of this error here and here. Dan later tweeted my example of a mistake out and that conversation can be found here. And that tweet was used by the NY Daily News when they interviewed him about it here.
Curriculum Tags: All

We continue to add to our Engaging Math blog (in fact we just presented it at the When Faith Meets Pedagogy conference today) and I'll high light a couple here now. The first was another Tarsia puzzle. I talked about these last week and as we continue to create them I will post them here as well. This time the topic is multiplying and dividing by powers of 10. Everyone we show these seems to really like these puzzles.
Curriculum Tags: Gr8
http://engaging-math.blogspot.ca/2014/10/tarsia-puzzle-multiplying-and-dividing.html

Another one is an open sort dealing with similarity and congruence. In this one students are each given a card with a set of shapes, figures or pictures on it. They are then asked to sort themselves by using any criteria they want. That is what makes the sort open. Eventually the hope is that (with a little prodding, they get to the fact that there are two groups, similar figures and those that are congruent. 
Curriculum Tags: Gr7, Gr8
http://engaging-math.blogspot.ca/2014/10/an-open-sort-dealing-with-similarity.html


A new activity from Mathalicious. This one dealing with solving solving and graphing quadratics. Their lessons are always awesome. This one takes the classic profit/cost type question and brings in a Nintendo flair. To get more from Mathalicious, you need to become a member but the cost of that is actually quite minimal. So consider it.
Curriculum Tags: MPM2D, MCR3U, MCF3M
http://mathalicious.com/lessons/wiibates

This one is an online app that takes the scenario of shopping for some toys and turns it into a question about discounts and tax. the app is a bit crude but it could be useful for gr7 & 8 students as well as MAT1L/2L students. Thanks to Tiffany Hayes for this one
Curriculum Tags: Gr7, Gr8, MAT1L, MAT2L
http://www.mathplayground.com/percent_shopping.html



For a while there I couldn't stop playing 2048 (I have gotten over it). My daughter, however, found this version that has you trying to build the Fibonacci Sequence. So instead of trying to get numbers that double you are trying to get consecutive Fibonacci Numbers. Fun and perfect for patterning.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
http://www.coolmath-games.com/0-2048-fibonacci/index.html

So Fun. Though you will have to explain absolute value signs (Not sure that is in our curriculum explicitly).
Curriculum Tags: MCR3U, MCF3M, MHF4U, MCV4U
https://twitter.com/SciencePorn/status/523272775931535360/photo/1

We used this one as a Minds on a recent blog post from Engaging Math. A great starter for dealing with proportional reasoning and scatter plots. Have students ask questions about this or you ask "How tall would the person be that would fit in this shoe?" then go on to talk about proportional reasoning and ratios or scatterplots (connection between foot size and height - if any)
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P, MDM4U, MAP4C
http://www.shoppedornot.com/wp-content/uploads/2011/02/giant-shoe-on-truck.png

Here is a great series of images dealing with some familiar patterns. In each case they fall apart in the next case but I do love them anyway. Good for showing students some different types of patterns
Curriculum Tags: Gr7, Gr8
https://twitter.com/krish_innovates/status/523875805282455553/photo/1
https://twitter.com/krish_innovates/status/523875888182886402/photo/1
https://twitter.com/krish_innovates/status/523875954054430720/photo/1
https://twitter.com/krish_innovates/status/523876005900201985/photo/1