Math Links for Week Ending Jan. 13th, 2017

When someone you know has a YouTube video with almost 10 million views and that video is related to math, well, you can't ignore it. The story that @slamdunkmath tells about the video is actually a pretty cool read. Check it out (but not until after you watch the video.
Curriculum Tags: All
http://slamdunkmath.blogspot.ca/2017/01/15-minutes.html

I'm a sucker for a good data set, especially if someone else finds it. In this case it was @Wheeler_Laura who found a nice data set connecting flight length and cost. A great data set if you are looking at linear relations. Check out all of her activity resources at the link below.
Curriculum Tags: MPM1D, MFM1P, MFM2P, MDM4U, MAP4C
https://mslwheeler.wordpress.com/2017/01/07/flight-costs-mfm2p/



I'm working on a new sorting activity for solving equations that involves equations written as strips to show the equality of the sides. To help I created this dynamic sketch to make the strips given any simple equation in the form ax + b = c in its various forms (with natural numbered coefficients). Once you input the coefficients then you can take a screenshot of the representation you want (there are four versions of the representation.
Curriculum Tags: Gr7, Gr8, MFM1P, MFM2P
http://engaging-math.blogspot.ca/p/web-sketches.html

There is a lot of great math that goes into why airlines overbook fights and it has a lot to do with the normal distribution and expected value. Don't forget to get all the lesson extras on the TED-Ed site. Thanks to David Broad for this one.
Curriculum Tags: MDM4U
http://ed.ted.com/lessons/why-do-airlines-sell-too-many-tickets-nina-klietsch

I have always loved the story of Eratosthenes and how he estimated the Earth's circumference by just using shadows, angles, parallel lines and a bit of proportions all about 2000 years ago. And now here is a short video from @BI_Video about it. Thanks to @Esping_math for pointing this one out.
Curriculum Tags: Gr8, MPM1D, MFM1P
http://www.businessinsider.com/how-greek-eratosthenes-calculated-earth-circumference-2016-6

I like this visual representation of adding integers from @JamesTanton. I'm a big fan of visually representing math. You can look at more of his work at the link below. Thanks to @mathletepearce for pointing this one out.
Curriculum Tags: Gr7, Gr8
https://www.facebook.com/photo.php?fbid=10208363484268439&set=gm.646268588906954&type=3&theater