Math Links for Week Ending June 10th, 2022

Featured Links 

It is that time of year again when you can participate in #MathPhoto2022. In this first week we are looking for images that connect to #eight
Curriculum Tags: All
https://twitter.com/TheErickLee/status/1534929446293192705

It's time to kick off #MathPhoto22! During week 1, look for #eight to mark the eighth year of the math photo challenge. Where do you see eight as a shape, quantity or numeral? Take photos and post to Twitter using the hashtags #MathPhoto22 and #eight. #MTBoS #ITeachMath pic.twitter.com/pHLhwIt7Jy

— Erick Lee HRCE Math (@TheErickLee) June 9, 2022

Resource Links 

I always appreciate when @mathequalslove compiles one of her lists. Great stuff here.
Curriculum Tags: All
https://twitter.com/mathequalslove/status/1534286067272122370

If you are out of school, I hope you are enjoying your well-deserved summer break!

If you are still in school, I hope you will enjoy this list of 52 Fun and Engaging End-of-Year Activities for Math Class that I put together! https://t.co/3FUCDSCx9c #mtbos #iteachmath pic.twitter.com/FRMv2WulhD

— Sarah Carter (@mathequalslove) June 7, 2022

Polypad is just getting better and better. 
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U
https://twitter.com/MathigonOrg/status/1534173521621942272

Aggregating and visualising random data on Polypad is now easier than ever before! Simply select some dice, coins or spinners and then use the "tabulate" and chart shortcuts in the action bar: https://t.co/uv9FdwW9mM pic.twitter.com/wRHjcGLnlm

— Mathigon (@MathigonOrg) June 7, 2022

Video Links 

I think that if you had some kids who were particularly fond of calculating, you could unleash some of these sequences on them 
Curriculum Tags: All
https://www.youtube.com/watch?v=p-HN_ICaCyM

Image Links 

My submission for #MathPhoto2022 this week:
Curriculum Tags: All
https://twitter.com/davidpetro314/status/1535621999057424384

This week for #MathPhoto2022 the theme is #eight. I like this #tessellation on some old linoleum tile that has 8 vertices

#MathChat #MTBoS #iTeachMath pic.twitter.com/D9Vt10DfU7

— David Petro (@davidpetro314) June 11, 2022

Math Links for Week Ending Aug. 20th, 2021

Featured Links

Lots of stuff this week to support the newly released Grade 9 Math curriculum. Firstly a new (to me) resource BHNMath that has all sorts of resources for Ontario secondary school students, parents and teachers. For example, there are a lot of references to story telling in the new grade 9 curriculum and so here is a resource for topic ideas for those expectations. Thanks to @RobinMath3 for pointing this resource out. 
Curriculum Tags:All
https://www.bhnmath.ca/teachers/courses/mth1w1/tell-a-story/

I've begun creating a list of some "Tell a Story" topic ideas for #MTH1W. I'll keep adding topics as I think of them. Suggestions are very welcome! The more cultures/contexts, the better!https://t.co/161ZQOPOtn pic.twitter.com/gEmnXIOIci

— Adam Gesjorskyj (@AGesjorskyj) August 18, 2021

Resource Links

It seems that @HTheijsmeijer has been working hard coming up with resources for specific expectations for the new Grade 9 course connecting to the cultural context and she's sharing them and asking for feedback to make them better. Check them out here
Curriculum Tags: MTH1W
Golden Ratio: https://docs.google.com/document/d/1WoAlTL-c2UZmAV_wID1S4e8oP4N5rYkNiZOKoMULh24/edit
Right Angled Triangles: https://docs.google.com/document/d/1o-XrQIBcwlSpBUORoB-AtEKy7LSGljv36wrdH6TO6vg/edit
Number Systems: https://docs.google.com/document/d/1Ja6uzkfJFhb8N34BdA0YYn_k1kHiFWLFmo7Eh2Fgq9k/edit

Another teacher resource for #MTH1W - this time for the Golden Ratio in various cultures, which could fit well with B1.3 (use patterns and number relationships to explain density/infinity/limit...)

Again, suggestions/additions more than welcome!https://t.co/FReaIEgEDW

— Heather Theijsmeijer (@HTheijsmeijer) August 19, 2021

Put this together this afternoon as a #MTH1W resource. Suggestions/additions welcome!

Right triangle side relationship resources (alternative backgrounds to the "Pythagorean Theorem"):https://t.co/8b494MCoof

— Heather Theijsmeijer (@HTheijsmeijer) August 18, 2021

One more #MTH1W resource, this one for B1.1 (...number concept to tell a story about its development and use in a specific culture...).

I definitely need help filling this one out - suggestions/additions welcome!

Counting Systems from Around the World:https://t.co/JwEhdfPLS4

— Heather Theijsmeijer (@HTheijsmeijer) August 20, 2021

I've mentioned this coding resource specific to Grade 9 Math before. Now all the weekly challenges are there. So check them out. 
Curriculum Tags: MTH1W
https://sites.google.com/apps.hpedsb.on.ca/codingchallenge/home

The 8th (and final) #mth1wCodingChallenge is posted. This week's focus is creating animations in Scratch to tell stories. Great for the SEL and story telling expectations.

Thanks to all those who joined. All the best with #mth1w!
https://t.co/4a6JMoHdOf

— Dave Lanovaz (@DaveLanovaz) August 16, 2021

Here's a great @OpenMiddle interactive for sum of angles in a triangle
Curriculum Tags: Gr8, MTH1W

https://twitter.com/TimBrzezinski/status/1427639764119924742

Wondering if this @openmiddle problem by @aa_henderson can help Ss discover the relationship FIRST vs. being a problem to work through afterwards. 🤔 With 192 unique solutions, I’m hoping “yes”. 🙂 https://t.co/N6KQgOSR0u @geogebra @robertkaplinsky #MTBoS #ITeachMath #mathchat pic.twitter.com/eUyHhOz4Z5

— Tim Brzezinski (@TimBrzezinski) August 17, 2021

And speaking of @OpenMiddle, here's another for graphing. 
Curriculum Tags: Gr7, Gr8

https://twitter.com/robertkaplinsky/status/1428147213247684609

Looking to challenge your students who are learning about the coordinate plane? Try this @openmiddle problem with them. https://t.co/DF2YVKmcue #iteachmath pic.twitter.com/T22Z2Na8hy

— Robert Kaplinsky (@robertkaplinsky) August 19, 2021

And @NatBanting says that creating interactive resources using @Mathigon isn't terrible. Check this one out for beginning probability. 
Curriculum Tags: Gr7, Gr8
https://mathigon.org/task/ace-in-the-hole

This Summer I tried my hand at building a @MathigonOrg task for their library.https://t.co/8YxoTG14WW

Builder was quick to pick up and @davidporas was there when I needed it!#MTBoS #iteachmath

— Nat Banting (@NatBanting) August 16, 2021

Video/Audio Links

And some more for the new Grade 9 math curriculum it's @Jason_To talking about destreaming and anti-racism.
Curriculum Tags: MTH1W
https://www.cbc.ca/listen/live-radio/1-100-ottawa-morning/clip/15861138-teachers-grade-9-math-curriculum

Thanks to @OttawaMorning and Jodie Hudgin for the bright-and-early convo about destreaming and anti-racism in math learning.

Here's the recording for those that were still in bed: https://t.co/d4Yj9EveE0 https://t.co/lcqDYNaMnN

— Jason To (@Jason_To) August 18, 2021

Need a visual on the sum of a series?  How about this one from @TedG on sums of powers of 3s?
Curriculum Tags: MCR3U
https://www.youtube.com/watch?v=9IAm75UY2U8

And it seems that @Howie_Hua continues to give us great short videos on math topics. This time it's the Birthday Problem. 
Curriculum Tags: MDM4U
https://twitter.com/howie_hua/status/1427798204305743876

New TikTok video: The Birthday Paradox pic.twitter.com/kQcnaGYFRL

— Howie Hua (@howie_hua) August 18, 2021

Image Links

Got some kids who need a mental challenge? Ask them to explain this one dealing with imaginary numbers and everyone's favourite math theorem
Curriculum Tags: MCR3U, MHF4U
https://twitter.com/pickover/status/1428504250867494913

Mathematics.

A Pythagorean triangle visits us from the Twilight Zone, and we shiver in ecstasy. (a² + b² = c²) pic.twitter.com/6Yf5hykeiY

— Cliff Pickover (@pickover) August 19, 2021

Math Links for Week Ending Jul. 16th, 2021

Featured Links

If you follow Ontario math at all this week then you know that a bomb dropped in the area of equity and culturally responsive curriculum. That is, somehow, some of the language about these things that was in the front matter of the new grade 9 curriculum was quietly stripped out. However, people noticed. You can see exactly what the changes were in this Tweet and the associated comments (some of the comments further down the list as well). And even though this directly affects the current Gr 9 curriculum, this really affects all future curriculums. Let your local MPP know that you are not OK with this. 
Curriculum Tags: All
https://twitter.com/realJ_Mitchell/status/1415285871415373831

This entire section of the front matter to the grade nine math curriculum appears to have been removed.
Why?
Because some far right politicians got upset.
Why are they driving #OntEd curriculum?

YOU should care about this deletion, even if you don’t teach math. pic.twitter.com/xtZTMy6d9y

— Jamie Mitchell (@realJ_Mitchell) July 14, 2021

Looking at a side-by-side comparison of the original #OntEd destreamed math front matter and the edits that were released yesterday.
The edits are evil.
Dive into the thread if you are interested.

— Jamie Mitchell (@realJ_Mitchell) July 14, 2021

Resource Links

It's always nice to have a list of "go to" sites for resources. This list was curated by @JRappaport27. You an also see my list on this blog in the Best of the Web tab. 
Curriculum Tags: All
https://twitter.com/JRappaport27/status/1415702732124590081

I took a group of educators through a resource share this morning. All are linked and included in each slide is an overview and types of tasks found in each. Please share with anyone who might find this useful. #mtbos #iteachmath @fawnpnguyen @OAMElearns https://t.co/x2THNyjZhm pic.twitter.com/reU3esKlTH

— Jordan Rappaport (@JRappaport27) July 15, 2021

I like these two from @MathTechCoach on probability. This first one on randomness
Curriculum Tags: Gr7, Gr8, MDM4U
https://twitter.com/MathTechCoach/status/1413970469334798337

If you were unable to attend my session on Intuition, Simulation, Calculation: Teaching About Randomness, Variability, and Probability, here is a link to the recording.https://t.co/GMZEN9moV6
and the activity in Desmos https://t.co/8Ty6BRKKyq and GeoGebra https://t.co/MUWLsf0GCz

— Steve Phelps (@MathTechCoach) July 10, 2021

And I really like this one that is dealing with the idea of informal language with probability. It would be a great activity to use when just starting out.
Curriculum Tags: Gr7, Gr8, MDM4U
https://twitter.com/MathTechCoach/status/1414294401380241416

Thanks to the more than 100 folks who gave this a try.

Here is the teacher link for those interested: https://t.co/RSIkZA6ogl https://t.co/DYHOR5gD9k pic.twitter.com/Uaag3i5sf6

— Steve Phelps (@MathTechCoach) July 11, 2021

Opinion Links

And I would have been shocked if @MathGarden wouldn't have weighed in on this week's curriculum shenanigans. Given the title: "White Supremacist Ideology Influences Ontario Math Curriculum: Outcome is Inferior Mathematics." he clearly lets the people in power have it. Too bad they likely won't see this.
Curriculum Tags: All
https://sunilsingh-42118.medium.com/white-supremacist-ideology-influences-ontario-math-curriculum-outcome-is-inferior-mathematics-39ab900ed91d

Video Links

A nice video and interactive from @TimBrzezinski on the area of a Trapezoid
Curriculum Tags: Gr7, Gr8
https://twitter.com/TimBrzezinski/status/1413662639830482947

Following in the spirit of today’s Twitter convo inspired by @Sneffleupagus , here’s one for the area of a trapezoid: https://t.co/a2UqqyJclq @geogebra #MTBoS #ITeachMath #math #geometry #MathChat #geomchat pic.twitter.com/lhcXOgYWKu

— Tim Brzezinski (@TimBrzezinski) July 10, 2021

And this time one for the area of a triangle
Curriculum Tags: Gr7, Gr8
https://twitter.com/TimBrzezinski/status/1413307284369854464

Inspired by @Sneffleupagus : Another @geogebra resource through which Ss can explore areas of triangles: https://t.co/8rtitlwZyd #MTBoS #ITeachMath #geometry #math #maths pic.twitter.com/gllzYk4Ppg

— Tim Brzezinski (@TimBrzezinski) July 9, 2021

And here is another triangle area video and interactive
Curriculum Tags: Gr7, Gr8
https://twitter.com/dment37/status/1414124122687381506

Puzzle for the area of the triangle (acute or obtuse)@geogebra
https://t.co/s8R8SUoBzg#geogebra #MTBoS #ITeachMath #math #maths #mathgif #MathEd @PerHenrikChris1
@Bancoche #geogebrart pic.twitter.com/N3SyJdla8x

— Daniel Mentrard (@dment37) July 11, 2021

One of the expectations in the new Ontario Gr9 curriculum is about circle properties. So this video and interactive would be perfect. 
Curriculum Tags: MTH1W
https://twitter.com/TimBrzezinski/status/1415121531374538758

Enjoy this inscribed angle dance made in @Desmos!

Still have a couple of items to fix, but I’m happy with the way it works so far: https://t.co/COHT8E7814 @AlgebraDesmos @eluberoff #MTBoS #ITeachMath #math #geometry #MathChat pic.twitter.com/DePLEbuwjb

— Tim Brzezinski (@TimBrzezinski) July 14, 2021

Image Links

Given that we had an equity issue here in Ontario this week, the week 6 theme of #MathPhoto21 seems particularly on point
Curriculum Tags: All
https://twitter.com/hashtag/MathPhoto21?src=hashtag_click&f=live

Week 6 of #MathPhoto21 starts today with #EthnoMath. Thanks to @NadineMcSpadden @nikkilineham @EduBirkett for your help getting the prompt together😊 pic.twitter.com/lk5KFBdYch

— Jess Kyle (@jesannwa) July 15, 2021

A nice tessellation 
Curriculum Tags: Gr7
https://twitter.com/PolygoniaDsgns/status/1413496457164955654

Silver, purple, blue Metallic ink, 1mm. Designed with the #upcoming nested "triads" #free tool. #math #art #vector #design #pattern #comingsoon #svg #plotter #plottertwitter #gold #geometric #geometricart #geometricjuly #plotparty pic.twitter.com/BPlkvQl61o

— Polygonia Designs (@PolygoniaDsgns) July 9, 2021

Here's a nice problem dealing with the area of circles. 
Curriculum Tags: Gr7, Gr8
https://twitter.com/fermatslibrary/status/1413119456532959233

The bull's eye illusion. At first sight the inner disk in the center may appear larger in area than the outer ring, but the two have the same area: (5²−4²)π=3²π pic.twitter.com/so9pFfMIxE

— Fermat's Library (@fermatslibrary) July 8, 2021

   

Math Links for Week Ending May 7th, 2021

Featured Links 

Looking for some tasks for grade 3-10? Fractions, proportions, volume, estimation and more. All in multiple day formats. Check out the @MakeMathMoments site. 
Curriculum Tags: All
https://learn.makemathmoments.com/tasks/

Resource Links 

A recent blog post on Flowing Data on Steph Curry's recent 3 point streak reminds me of all the data related stuff on this site. Especially if you want examples of types of graphs, at the bottom of each post is a link to collections of similar types of graphs. 
Curriculum Tags: MDM4U
https://flowingdata.com/2021/05/03/stephen-currys-record-setting-month-for-shooting-threes/

Video Links 

Who knew symmetry could be so trippy?
Curiculum Tags: All
https://twitter.com/junkiyoshi/status/1390268312760717316

Symmetry. Source code -> https://t.co/iXQgLoZtGM #openframeworks #programming #creativecoding #プログラミング pic.twitter.com/idyqeviJ9W

— JunKiyoshi (@junkiyoshi) May 6, 2021

Image Links 

I am liking Mathigon's Polypad more and more. Here we have a tessellation from @MarkChubb3
Curriculum Tags: All
https://twitter.com/MarkChubb3/status/1388686379455066118 

Tiling using Tantrix tiles.
Can you spot what repeats?@MathigonOrg pic.twitter.com/YyDBKtNJRB

— Mark Chubb (@MarkChubb3) May 2, 2021

It's always good to have another probability problem in your back pocket
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U
https://twitter.com/jamestanton/status/1389573288192483331

(Inspired by thinking from Dick Hess ) Two dots from the square shown are chosen at random. What is probability they are the same color? Does the size of the square matter? pic.twitter.com/WeTNsf6Ln6

— James Tanton (@jamestanton) May 4, 2021

It was Star Wars day this past week so here's some data. It seems like George Lucas was maybe a bit lax in the dialogue department. 
Curriculum Tags: Gr7, Gr8, MDM4U
https://twitter.com/neilrkaye/status/1389607247031021572

May the fourth be with you! Who has the most lines in the original Star Wars trilogy and what are their 20 top words?#dataviz #MayThe4thBeWithYou #MayTheFourthBeWithYou pic.twitter.com/WarvwX2XOf

— Neil Kaye (@neilrkaye) May 4, 2021

 

Math Links for Week Ending Apr. 2nd, 2021

Featured Links

I have a pile of @Desmos activities that are useable but not ready for primetime (if you are interested here's a link) but I am slowly cleaning them up and releasing them. In this case, it's a way to introduce the Pythagorean theorem by focusing on the area model, well before just looking at the abstract relationship. 
Curriculum Tags: Gr8, MPM1D, MFM1P
https://teacher.desmos.com/activitybuilder/custom/5ef94d7221f7d778901d9338

I've also learned some Pattern Matching in Desmos CL from @MrChowMath and released a couple of others. One on investigating Pi and the other on Scientific Notation (with two versions - one with only positive exponents the other with both positive and negative). 
Curriculum Tags: Gr7, Gr8
https://teacher.desmos.com/activitybuilder/custom/603c2e023614df0d4f67c7aa
https://teacher.desmos.com/activitybuilder/custom/5f713da629b5b60b2f6a5aac
https://teacher.desmos.com/activitybuilder/custom/5f6c7c97a9176f3ebf55f986

[New @Desmos Activity] If you have done an informal activity where students measure the circumference & diameter of various circles to estimate Pi, then this short activity helps to solidify that it's actually 3.14https://t.co/JUNFclWxKi#MathChat #MTBoS #iTeachMath pic.twitter.com/i9lFDB14E6

— David Petro (@davidpetro314) March 28, 2021

[New @Desmos Activity] Thanks to @mrchowmath and his pattern matching tutorial videos, I finally have this set of scientific notation practice problems working wellhttps://t.co/JUNFclWxKi#MathChat #MTBoS #iTeachMath pic.twitter.com/7TFk6SGazM

— David Petro (@davidpetro314) March 28, 2021

Resource Links
I was just talking about this problem in class in the context of Pi Day. Now we have a way to do multiple experiments. 
Curriculum Tags: MDM4U
https://twitter.com/Christophe_Sew/status/1376843025784008710

Toothpicks ✅
Paper ✅@desmos activity ✅

All ready for some Buffon's Needle tomorrow. 🧮https://t.co/S33WXtOwLm@davidpetro314 #ImproveMyAB #ITeachMath pic.twitter.com/QfUSAkxIhs

— Mr. S (@Christophe_Sew) March 30, 2021

Have you heard? There was a ship stuck in the Suez Canal. This article has so much good information, I dare you not to come up with at least one related math problem. 
Curriculum Tags: All
https://www.washingtonpost.com/world/2021/03/25/faq-suez-canal-ever-given/

Lots of information here that you could easily create some #math problems out of https://t.co/dMIF0qnLaK

Pythagorean Theorem, Ratios, Trig, angles and more#MathChat #MTBoS #iTeachMath

— David Petro (@davidpetro314) March 28, 2021

I can't get enough of these #SlowRevealGraphs from @jennalaib. Be sure to check out the entire site for all the posts. 
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U
https://slowrevealgraphs.com/2021/03/29/speedy-animals/

I like skyscraper puzzles, an now a @Desmos version
Curriculum Tags: All
https://twitter.com/TMonark/status/1378074463141519363

I edited @TheErickLee 's awesome #SkyScrappersPuzzle with a "Reset" button with the help of @mrchowmath and offered it to my Geometry class before we start doing #TriangleCongruence and it was fun and full of #LogicalThinking #MTBoS https://t.co/lImwtjpqWj pic.twitter.com/EYF3sYzfm3

— Monark Trivedi (@TMonark) April 2, 2021

Video Links

This is older but I hadn't seen it before. Good for probability discussions including the need for multiply trials in order to have experimental probability match theoretical. Thanks to @robinmath3 for pointing this one out. 
Curriculum Tags: Gr7, Gr8, MDM4U, MBF3C
https://www.youtube.com/watch?v=FRlbNOno5VA

I had to look up what the Euclidian Algorithm was but thanks to this video, I have a better idea. 
Curriculum Tags: Gr7, Gr8

https://twitter.com/howie_hua/status/1369476859092557826

Tactile version of the Euclidean Algorithm pic.twitter.com/Hjj5TEO5Q3

— Howie Hua (@howie_hua) March 10, 2021

A couple more pattern matching videos from @MrChowMath for those Desmos CL-Heads out their
Curriculum Tags: All
https://www.youtube.com/watch?v=oPAevo7CaHU
https://www.youtube.com/watch?v=JTAGsw1InOg

Image Links

Here's a good reminder of why this classic thinking problem is a good one
Curriculum Tags:All
https://twitter.com/MrValencia24/status/1375499464509681667

Inspired by the work of @pgliljedahl, today ss at #WeAreChappaqua experienced a different approach.

Engagement ✔️
Collaboration ✔️
Knowledge Mobility ✔️
Gallery Walk ✔️#ThinkingClassroom ✔️#MathPlay ✔️#MTBoS #ITeachMath #MathisFun #MathRocks #MathArt #MathEd pic.twitter.com/fKPb5JjO02

— Libo Valencia (@MrValencia24) March 26, 2021

And Ever Given keeps giving us math problems
Curriculum Tags: Gr8, MPM1D, MFM1P
https://twitter.com/howie_hua/status/1375660413065437187

Math teachers: "Okay class, given line m is parallel to line n and angle a is 135 degrees, find the measure of the missing angles." pic.twitter.com/7dB25JYxTt

— Howie Hua (@howie_hua) March 27, 2021

This seems like a pretty complex way to calculate root 2 but I like it.

Curriculum Tags: All
https://twitter.com/pickover/status/1375493243266289671

This is mathematics. https://t.co/0pMybzHYfP pic.twitter.com/Qe0s71LpHk

— Cliff Pickover (@pickover) March 26, 2021

I've always like this story about Ramanajan
Curriculum Tags: All

https://twitter.com/fermatslibrary/status/1376525060488454153

1729 was the number of the cab that G.H. Hardy took when he visited S. Ramanujan in the hospital.

Hardy thought it was a "dull number" and Ramanujan replied "it is a very interesting number. It is the smallest number expressible as the sum of two cubes in two different ways" pic.twitter.com/OFc0UATSXR

— Fermat's Library (@fermatslibrary) March 29, 2021

Math Links for Week Ending Nov 6th.

Featured Links

This weekend I am part of the free @MakeMathMoments Virtual Summit. There is a pretty good slate of speakers (and me :-)  ) Some are live, some are pre recorded. Even if you read this a few days late, you can still see some of the recording (just do it before Nov13). Just go to the website and register. 
Curriculum Tags: All
https://summit.makemathmoments.com/schedule/  

Resource Links

One of the things I'm talking about in my session is that I have been playing around with using a Desmos Activity to create online tests for students that are similar but have different values in the questions for each student. This activity isn't one of those tests. Instead it's a compilation of a bunch of possible types of questions that could be created. And by type, I don't mean the type of math but instead, how many random variables are needed to generate the questions. Check out the description for a couple of videos too. One on what the file is, in general, and the other on how you might use it to create your own questions.
Curriculum Tags: All
https://teacher.desmos.com/activitybuilder/custom/5f8c7349e0247f0cdae253ae

Though not as frequently as me, @Mathsgem posts some of her favourite found resources on the Internet. Here's her latest:
Curriculum Tags: All
https://twitter.com/mathsjem/status/1322826202252533760

New! My 137th gems post. Ideas, resources and updates for maths teachers.https://t.co/FTSeTlJ6HJ

Hat tips to follow!#mathschat #mathsgems #teammaths pic.twitter.com/dQRxtBNWCB

— Jo Morgan (@mathsjem) November 1, 2020

I have always liked how @MathEqualsLove shares her stuff and now she has a new website to do it. Check it out.
Curriculum Tags:All
https://mathequalslove.net/

My new website is LIVE! I switched from Blogger to Wordpress and finally bought my own domain name. I hope you enjoy visiting https://t.co/8JreGD200v. Hopefully the new navigation menu will make finding stuff much faster and easier! #mtbos #iteachmath pic.twitter.com/UDBvLYroAy

— Sarah Carter (@mathequalslove) November 1, 2020

If you didn't know already, @pgliljedahl finally got a book about the Thinking Classroom and @wheeler_laura not only does some illustrations for the book but she's got the book club too
Curriculum Tags: All
https://ca.corwin.com/en-gb/nam/building-thinking-classrooms-in-mathematics-grades-k-12/book268862

#ThinkingClassroom book club schedule is ready. We'll meet 8pm EST Mondays starting Nov. 9th.
Who's in? pic.twitter.com/eH4kqNJJhO

— Laura Wheeler (@wheeler_laura) November 1, 2020

New from @christophe_sew, practice on optimizing rectangles

Curriculum Tags: MPM1D, MCV4U
https://twitter.com/Christophe_Sew/status/1323492785530511360

Back in a classroom next week!@desmos lesson on OPTIMISATION (IB AA SL).

It seemed to work well. Students "solved" the initial problems before using optimisation to replicate the result.https://t.co/u1h9r4q7wG@AlgebraDesmos @davidpetro314 #iteachmath #mathsed #mathschat pic.twitter.com/zi8ZLYpikd

— Mr. S (@Christophe_Sew) November 3, 2020

Article Links

Although I wouldn't characterize exponential decay as obscure, here are 5 obscure math equations that rule the world. 
Curriculum Tags:All
https://www.discovermagazine.com/the-sciences/5-obscure-formulas-that-rule-the-world 

You probably don't think about the Dirac equation on an average day, but it describes just about everything that happens to you. https://t.co/2YA0YhRsjG

— Discover Magazine (@DiscoverMag) November 1, 2020

Video/Audio Links

My latest podcast is out with @Pi_Lab and @PeterTaylor77 talking about animations and exponential functions ahead of their upcoming webinar. 
Curriculum Tags: MHF4U, MCR3U
https://talks.oame.on.ca/season-3 





A couple of cool visualizations by @Matthen2
Curriculum Tags: MHF4U
https://twitter.com/matthen2/status/1322483571978760193

how to draw a logarithmic spiral. Use evenly spaced radial rays, and draw a perpendicular from one ray until it hits the next. repeat pic.twitter.com/f2NTPqLgSG

— Matt Henderson (@matthen2) October 31, 2020

I like this one from @Matthen2 to prove Pythagorean Theorem

Curriculum Tags: Gr8, MPM1D, MFM1P
https://twitter.com/matthen2/status/1322843458566983680

proof of an important circle theorem pic.twitter.com/MM1uAvBJdy

— Matt Henderson (@matthen2) November 1, 2020

Image Links

This is a fun way to have number sense be more play based. 
Curriculum Tags: Gr7 
https://twitter.com/MarkChubb3/status/1322554205295575042

Creating images worth 2000.

Can you tell what each rod is worth?
How did you count?

Creativity opens up learning and leads to richer discussions! pic.twitter.com/NKtSBTbQgq

— Mark Chubb (@MarkChubb3) October 31, 2020

Have you seen these image based solving equations puzzles on the Interwebs? Here is a fun idea to have your kids make them up using Google Slides (or similar)
Curriculum Tags: Gr7, Gr8
https://twitter.com/GiftedTawk/status/1322524994061127680

My students created this Math Picture Puzzle Jamboard based on their hobbies or passions. Interested in a copy? Would you like to swap Jamboards with your students’ puzzles? pic.twitter.com/fyP5vXZPNq

— Julia's #STEAMing up Questions (@GiftedTawk) October 31, 2020

This is an awesome probability resource. 
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U

https://twitter.com/xkcdComic/status/1322376151226986496

Probability Comparisons https://t.co/xZn0qRVtoe https://t.co/jCUNkWGEFB pic.twitter.com/cP5NZrPtX9

— XKCD Comic (@xkcdComic) October 31, 2020

Deep questions from @JamesTanton about parabolas
Curriculum Tags: MCR3U
https://twitter.com/jamestanton/status/1323971119838158848

If a quadratic function has odd integer outputs on three consecutive integer inputs, must it have odd integer outputs on *all* integer inputs? pic.twitter.com/6IjrA7PGbC

— James Tanton (@jamestanton) November 4, 2020

You can always count on @MonaChalabi to give a unique perspective, in this case it's comparing winning the lottery to casting the winning vote. Neat comparison. 
Curriculum Tags: MDM4U
https://twitter.com/MonaChalabi/status/1323765548698710016

A voter in America is five times more likely to cast THE decisive vote in the presidential election than a lottery player is to win the jackpot. Some of you still have time to make a good gamble! pic.twitter.com/tA2ScDce7L

— Mona Chalabi (@MonaChalabi) November 3, 2020

I thought this was an interesting way to look at how the voting was going in those slow to count states. Extrapolation to the rescue. 
Curriculum Tags: MPM1D, MFM1P, MDM4U
https://twitter.com/wayner99/status/1324188525114306561

Here is a graphic example of how that has evolved today in PA and GA. But we haven't received updates on NC. pic.twitter.com/20bVhKcifv

— Wayne Kozun (@wayner99) November 5, 2020

Math Links for Week Ending Jun. 7th, 2019

Featured Links
I like being able to show student work easily and this week I found a new way to do that using @getRocketbook and @Wipebook. If you don't know what a Rocketbook is, it's a reusable notebook. That is simplifying it greatly but you can watch this video to get the idea. It turns out you can download some free Rocketbook templates directly from their website and if you want to capture student work that they have put on Wipebook sheets, then all that is required is that you enlarge the QR code and symbols at the bottom of the Rocketbook sheet and the natural black boarder of the Wipebook sheet becomes a large Rocketbook sheet. Great, I think, for saving work from a vertical non permanent surface session. Below is how you could do it. And thanks to @MathisVisual for pointing out that Wipebook already has their own app to do something similar. Check it out here.
Curriculum Tags: All
https://www.youtube.com/watch?v=OluiiYYhS_I

Resource Links
Looking for some Geometry based activities? Here @teachmathtorr has shared almost 90 activities. Enjoy.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://twitter.com/Teachmathtorr/status/1135381510285144064

Hi @NatBanting Here is my list of the Desmos Activities I used this year. https://t.co/v43siq8IrG

Let me know of you have questions.

— Michele Torres (@Teachmathtorr) June 3, 2019

So any whole number can be written as the sum of three triangular numbers. Want to check this? Then Tweet any number to @3_triangles and this bot will send back a visual representation (where possible) of the three numbers. Here's one that I did. Thanks to @divbyzero for this one
Curriculum Tags: All
https://twitter.com/divbyzero/status/1136255191869734914

Any number can be written as the sum of three or fewer triangular numbers. @TedG made a triangular number Twitter bot @3_triangles—tweet it a number and it tweets the sum back to you. (Right now the bot checks its mentions periodically, so there may be a delay before a response.) https://t.co/rLcsq30KKu

— Dave Richeson (@divbyzero) June 5, 2019

Here's an idea for a lesson on percents thanks to @approx_normal. Take a look at your favourite rewards/loyalty program and calculate the percent return. For example, with me, it's buy 7 coke slurpies and get 1 free. Check out the article below
Curriculum Tags: Gr7, Gr8, MFM1P
https://www.tripofalifestyle.com/money/are-rewards-programs-worth-your-time/




Article Links
In times like these this doesn't surprise me. I thought it was a joke at first but, it turns out, nope, this is legit. More than half the people who responded to this survey say that we shouldn't teach Arabic numerals in schools.
Curriculum Tags: All
https://www.live5news.com/2019/05/19/should-arabic-numerals-be-taught-schools-most-americans-say-no/

Opinion Links
In response to some recent calls to get rid of Algebra in math class, @MathGarden posts this response
Curriculum Tags: All
https://medium.com/@sunilsingh_42118/the-bridge-between-arithmetic-and-algebra-is-broken-which-means-math-education-is-broken-62f68ec12c76

Video Links
Based on a prompt from @ecokrisb I fell down the YouTube rabbit hole and found these three videos on the history of algebra from @ProfKeithDevlin
Curriculum Tags: All
https://www.youtube.com/watch?v=WL6tFHUNTPE
https://www.youtube.com/watch?v=dR99o8C_zD4
https://www.youtube.com/watch?v=_Q_Qvr9zFp0

Image Links
Here is a nice probability context
Curriculum Tags: Gr7, Gr8, MDM4U
https://twitter.com/howie_hua/status/1136096737884483584

If this shows the probability of getting each toy, what's an efficient way to show that all these add up to 1? #mtbos pic.twitter.com/03TTr0sCZC

— Howie Hua (@howie_hua) June 5, 2019

Math Links for Week Ending Nov 30th, 2018

I dare you to watch this video and not have your curiosity piqued. In it @MrOrr_Geek and @MathletePearce take one for the team to explore proportional reasoning concepts. Get the full 3Act math task at the link below.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P, MAT1L, MAT2L
https://mrorr-isageek.com/chocolate-mania/

There has been a lot of talk in Ontario lately about going back to basics. And although I don't think we have lost the basics (and what the basics actually are is a discussion on its own), I do think there is no harm in practicing basic skills beyond the grades that they are taught. In this case, I took a cue from @gfletchy who has a set of subitizing multiplication cards and built a few different versions of these array multiplication cards. This way we can continue to practice mental multiplication without resorting to memorization techniques. With these cards students can practice multiplication up to 12x12.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P, MAT1L, MAT2L
http://engaging-math.blogspot.com/2018/11/array-multiplication-cards.html

It's no surprise that I am big fan of @pgliljedahl's ideas about the Thinking Classroom. Some of the things that still perplex me are things like assessment and how to properly manage flow. Another thing is the skill of helping students take notes. In this post @PaiMath does a great job outlining what note taking looks like in the Thinking Classroom. This is part one so I assume part two will be on the way.
Curriculum Tags: All
http://intersectpai.blogspot.com/2018/11/the-thinking-classroom-note-taking-part.html

Thanks for pointing this out @ddmeyer
Curriculum Tags: All
https://twitter.com/ddmeyer/status/1067989653003788289

"This is one of the most important principles in the whole of the art of teaching."#iteachmath /via @letsplaymath pic.twitter.com/9Az9dqAaHT

— Dan Meyer (@ddmeyer) November 29, 2018

A few weeks ago we hosted the OAME Leadership conference in Windsor. Here is a nice summary from @MarkChubb3 that does a nice job of connecting to the Ontario math curriculum processes of Reasoning & Proving.
Curriculum Tags: All
https://buildingmathematicians.wordpress.com/2018/11/14/reasoning-proving/



Continuing the conversation about math for math's sake, @mathgarden has this post on Medium. One thing I really like is the play aspect of how he dealt with math at home with his daughter. I feel like this is the kind of homework that our kids need. Just to tinker with math.
Curriculum Tags: All
https://medium.com/@sunilsingh_42118/mathematics-waits-for-everyone-but-few-wait-for-mathematics-7095c86cda70

I think that sometimes probability gets glossed over when, in fact, I think we need to look deeper at probability as it is one of those mathematical concepts that we want our our students to have a good grasp of. How else are we to teach them of the perils of gambling and lotteries. That all being said, @mathisvisual has tried to demystify theoretical probability in this video. Go to the link below for the full breakdown.
Curriculum Tags: Gr7, Gr8
http://mathisvisual.com/probability/

If you are doing patterning and you are looking for some non mathematical patterns to have some fun with your kids with, then @Numberphile has you covered.
Curriculum Tags: Gr7, Gr8
https://www.youtube.com/watch?v=OeGSQggDkxI

It's @DonFraser9 doing what he does best. Mixing a bit of humour and math
Curriculum Tags: All
https://twitter.com/DonFraser9/status/1068685234487488512

Love the OPEN questions... Oh! Is this too OPEN for you? #MTBoS ⁦@robertkaplinsky⁩ ⁦@LareRomano⁩ ⁦@Mathgarden⁩ ⁦@MathletePearce⁩ ⁦@MrOrr_geek⁩ ⁦@MatthewOldridge⁩ ⁦@davidpetro314⁩ ⁦@paul_math⁩ ⁦@MrAllenEdu⁩ ⁦@ddmeyer⁩ pic.twitter.com/77FnaYeoO7

— Don Fraser (@DonFraser9) December 1, 2018

Math Links for Week Ending Feb 16th, 2018

I actually first created this post last year but updated it this week. If you are looking for some interesting data sets to analyze with your classes, look no further than Five Thirty Eights set of data sets used for their articles. The data sets were around before but recently then just made it even easier to get the raw data with their new site https://data.fivethirtyeight.com/ Check out my original (updated) post on how to use the data in your data classes
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U, MAP4C
http://found-data.blogspot.ca/2017/06/five-thirty-eights-pile-of-data.html

I updated a couple of GSP sketches to WebSketches this week on sine and cosine law. In both cases you start with a sketch to have students verify that each law works (with random triangles) then each has two pages of randomly generated triangles. One page where you solve for a side length and the other where you solve for an angle.
Curriculum Tags: MPM2D, MBF3C
http://engaging-math.blogspot.ca/p/web-sketches.html

I sometimes don't think we give probability the treatment that it deserves. However, it is probably one of the few math skills that students need to be masterful with in order to navigate the world in a safe way. So with that I like this lesson that @MarkChubb3 lays out using this 3 player probability using dice rolling. Simple but it connects experimental and theoretical probability nicely.
Curriculum Tags: Gr7, Gr8, MBF3C, MEL3E
https://buildingmathematicians.wordpress.com/2018/02/08/from-experimental-to-theoretical-probability-sample-lesson/

I contend that when you are learning the multiplication tables, 7x8 is one of the hardest ones to learn. @JamesTanton uses that example to talk about understanding vs rote mathematics.
Curriculum Tags: All
https://medium.com/@jamestanton/7-times-8-is-54-the-call-for-math-memorization-950abcfc1fc7

Some more work from @mathletepearce on his @mathisvisual site on integer multiplication. I made a few suggestions and he expanded on them to make this video and the accompanying images. Check out the site.
Curriculum Tags: Gr8
http://mathisvisual.com/more-integer-multiplication/

I was at the @OMCAMath Retreat and the speaker was @pgliljedahl. He started with this neat problem.
Curriculum Tags: Gr8, MPM1D, MFM1P
https://twitter.com/davidpetro314/status/964209790795833344

What is the volume of the water that will end up in the smaller glass if it is slowly pushed into the larger glass ( bottom first)? Via @pgliljedahl at the @OMCAmath retreat #mathchat #thinkingclassroom pic.twitter.com/2HfMMO51Xv

— David Petro (@davidpetro314) February 15, 2018