Math Links for Week Ending Feb 15th, 2019

Featured Links

If you have never used Desmos Polygraph before then you are missing out. Kids play "Guess Who?" with mathematical images. You can see so many on the Activity Builder Website. That being said, this is just a great tool for any subject. To that end, I made a tutorial on how you can create versions for other subject areas. So you might want to send this out to your non math teacher friends. There is a full video on how to make them and several examples created from different subject areas.
Curriculum Tags: All
https://wecdsbit.blogspot.com/2019/02/creating-digital-guess-who-game.html

Resource Links

One of the things we are supposed to do in Ontario is develop the formula for the area of a circle. And my favourite method is to split a circle into triangular wedges and create a "parallelogram" from the pieces. In this activity @rnhung does just that (including a neat slide where he does the derivation step by step).
Curriculum Tags: Gr8
https://teacher.desmos.com/activitybuilder/custom/5a7f66d94bddb3422ca9e626

I really love this perimeter of an irregular shape problem shared by @dpscher as it starts out with hints that it's not solvable but, in fact, can be solved. I like the fact that you can confirm the answer with some concrete manipulation that could involve algebra or just plain strategic trial and error.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P

http://www.sineofthetimes.org/the-perimeter-problem/

Opinion Links
In his quest to help bring the joy back to mathematics @mathgarden posts his 100th article on Medium looking at various references to going beyond memorization and make math and play synonymous. It was nice to get a shout out as well for a term that I cannot claim as my own but often use in the context of how I want kids to interact with math: "tinker" and @BerkleyEverett's "dabble".
Curriculum Tags: All
https://medium.com/@sunilsingh_42118/dreaming-to-disrupt-mathematics-is-beginning-its-journey-back-home-de1761207985



Video/Audio Links
A new @numberphile video featuring @SimonSingh talking about two fun examples of maths (primes and binary) showing up in the TV show Futurama
Curriculum Tags: All
https://www.youtube.com/watch?v=IKwkX35bcdw

Another new @standupmaths video where he talks about how rounding issues can cause big problems.
Curriculum Tags: All
https://www.youtube.com/watch?v=0X_Hqb7qkW4

Five videos from @JamesTanton the king of joyous math all for the sake of the National Math Festival.
Curriculum Tags: All
Finger Multiplication: https://www.youtube.com/watch?v=_kSGW-BFfP8

90 Degree Rotations: https://www.youtube.com/watch?v=6deBCaMso_A

Math Salute: https://www.youtube.com/watch?v=OLO9wA56Y8s

Weird Stretch: https://www.youtube.com/watch?v=rQH4bWP923Y

Rope Folding: https://www.youtube.com/watch?v=yB_sS7LUlwU

Image Links
I love this post from @MonaChilabi showing examples all types of graphs, can you name them all?
Curriculum Tags: Gr7, Gr8, MDM4U
https://www.instagram.com/p/Bt1Fbbbn3GL/

View this post on Instagram

Can you name all of these chart types? I get to take over @designmuseum for the next two days so I've been thinking a lot about information design. I feel like the visual world around me has a lot of crap in it that either misinforms people or confuses them. I often use classic chart types as my base and then I illustrate the numbers by hand. I hope that when you look at my charts, you learn something but you also remember that flawed, biased humans are responsible for information design. Leave your quiz scores below (or not, maybe this is a bad idea?!)

A post shared by Mona Chalabi (@monachalabi) on Feb 13, 2019 at 8:56am PST