Math Links for Week Ending Jul. 9th, 2021

Featured Links 

Somehow I missed the beginning of #MathPhoto21. We are now in week 5 but you can see (and post about) the themes that have already come. One theme a week for 10 weeks. 
Curriculum Tags: All
https://twitter.com/hashtag/MathPhoto21?src=hashtag_click&f=live

It's time to kick off #MathPhoto21! During week 1, look for seven to celebrate the seventh year of the math photo challenge. Where do you see seven as a shape, quantity or numeral? Take photos and post to Twitter using the hashtags #MathPhoto21 and #seven. #MTBoS #ITeachMath pic.twitter.com/Fq66WSdoop

— Erick Lee HRCE Math (@TheErickLee) June 10, 2021

Week 2 of #MathPhoto21 is here! This week look for balance and #symmetry. Take photos and post to twitter using both #MathPhoto21 and #symmetry. #symmetrychat #MTBoS #iteachmath pic.twitter.com/h9uyckYu2k

— JoAnn Sandford HRCE Math (@joann_sandford) June 17, 2021

Check out this this week’s (Week 3) #MathPhoto21 challenge #circles take photos and post to twitter using both #MathPhoto21 and #circles #MTBoS #iteachmath #mathschat #MathsTalk pic.twitter.com/0BhGkqKGnf

— Cass Lowry (@cass_lowry) June 24, 2021

Check out this Week 4 of #MathPhoto21 challenge #lines.
Take photos and post to twitter using both #MathPhoto21 and #lines #MTBoS #iteachmath #mathschat #MathsTalk pic.twitter.com/dezLW40P9q

— Karen Campe (@KarenCampe) July 1, 2021

⏰for week 5️⃣ of #MathPhoto21! Where do you 👀#patterns? Take photos and share to 🐦using the hashtags #MathPhoto21 and #patterns. #MTBoS #ITeachMath #mathchat #visualmath pic.twitter.com/NPu3GhdJ6G

— Norma Gordon (@normabgordon) July 8, 2021

Resource Links 

If you've got Microbits in your class and you are doing some coding then you might want to try out this social distancing code
Curriculum Tags: Gr7, Gr8, MTH1W
http://brianaspinall.com/coding-a-microbit-social-distancing-app/

Coding A Micro:Bit Social Distancing App #CodeBreakerhttps://t.co/3012OPwdXV pic.twitter.com/a2gxBqGQjp

— Brian Aspinall (@mraspinall) July 3, 2021

A nice dynamic probability calculator
Curriculum Tags: MDM4U
https://twitter.com/geogebra/status/1412432802675576832

Statistics teachers:

📣 Our probability calculator now has a two-tailed option for all distributions! https://t.co/yQcFhdYC1W pic.twitter.com/5iQ1mor6sx

— GeoGebra (@geogebra) July 6, 2021

Some simple tweaks to help your direct instruction
Curriculum Tags: All
https://twitter.com/mpershan/status/1412547122608717825

Here are simple changes that would improve most direct instruction in math:

a) brief practice comes right after each example
b) write examples/problems before class
c) ask a "what if" for each example -- what if this was +3 instead of -3? what if you divide by 2 first? etc

— Michael Pershan (@mpershan) July 6, 2021

This is a pretty slick demo of multiplying and dividing by powers of 10
Curriculum Tags: Gr7, Gr8
https://twitter.com/jontheteacher/status/1412943852478947329

simple demonstration of multiplying and dividing by powers of ten (note static decimal point) in desmoshttps://t.co/C63iyPI2TW pic.twitter.com/kAi01vhoPv

— Jonathan Ashley (@jontheteacher) July 8, 2021

Audio/Video Links 

I've seen animations like this before but I like how this one shows it for four polynomials at once
Curriculum Tags: Gr8, MTH1W
https://twitter.com/SteveStuWill/status/1411435977336262657

Visual proof that the exterior angles of a polygon add up to 360 degrees. 👍

Credit: @MagicPi2 https://t.co/H13V7wOPaN pic.twitter.com/7TVaJEB9Nx

— Steve Stewart-Williams (@SteveStuWill) July 3, 2021

I have seen this sort of visual proof of the Pythagorean Theorem before (ie with water) but I've always seen the same video that's been around for a while. This looks like a newer construction. 
Curriculum Tags: Gr8, MTH1W
https://twitter.com/FixingEducation/status/1412069367001620480

Visual Proof of The Pythagorean Theorem!
Please pass on to your favorite math and science teachers. #PythagoreanTheorem #Math #Sciencepic.twitter.com/77GO1uHnvv

— Fixing Education (@FixingEducation) July 5, 2021

This mechanical linkage for to determine the centroid of any triangle is cool. I made a Desmos version here (hint: a trisection is needed). And there is a proof here. 
Curriculum Tags: MTH1W
https://twitter.com/ChocoLinkage/status/1412431934123253760

mechanical linkage showing the centroid of triangle

三角形の重心がわかるリンク機構 pic.twitter.com/HAm3auHI3U

— 上木 敬士郎 / Keishiro Ueki (@ChocoLinkage) July 6, 2021

If you are teaching any math concept, there is better anchoring for students if there is a story associated with it. My guess is that if they hear this baseball related story on a recent episode of @PlanetMoney they will come away with a great anchor about compound interest. It's good for just introducing the topic or more complex calculations involving annuities and pension payouts. Here's the short version: Pro baseball player Bobbly Bonilla gets the last $6 million of his contract bought out in a way that after 10 years, he gets over a $1 million a year for 25 years.  
Curriculum Tags: Gr8, MCR3U
http://ontariomath.blogspot.com/p/podcasts.html



Why get a job in Statistics? Why not?
Curriculum Tags: MDM4U
https://www.youtube.com/watch?v=uss7MXcpHaQ

Why be a statistician? Here's what one #stats pro LOVES about her work: https://t.co/RWRbGEd3mi

— This is Statistics (@ThisisStats) July 8, 2021

Seriously, who wouldn't want to hear Tom Hiddleson read math equations? Except, as @Howie_Hua points out, when he misses a value of Pi.
Curriculum Tags: All
https://twitter.com/bradwhipple/status/1412490326246318080

Tom Hiddleston reading math equations to cleanse the timeline pic.twitter.com/Q0BVprNGYC

— Braddington (@bradwhipple) July 6, 2021

Image Links 
Here's a prompt for your statistics classes
Curriculum Tags: MDM4U
https://twitter.com/ddmeyer/status/1410331780033380353

Got a question for your stats exam next year -

👉 How are both of these media orgs using bad stats to convince you to hire more cops and put more people in cages? pic.twitter.com/hxk2bRSfSK

— Dan Meyer (@ddmeyer) June 30, 2021

"When will we ever need this in real life?" - here's your answer
Curriculum Tags: All
https://twitter.com/ONTSpecialNeeds/status/1413503037495185409

Math is so much more than numbers! pic.twitter.com/uwcozzwf0T

— ONTSpecialNeeds (@ONTSpecialNeeds) July 9, 2021