## Friday, January 6, 2017

### Math Links for Week Ending Jan. 6th, 2017

I just came across this online graphing platform that is free for much of the stuff we do in high school math. Specifically statistical stuff in one and two variables. This is a site called Plot.ly and has a paid and free version. The free version is still pretty good with linear and quadratic regression as well as histograms and box plots (with outliers) and even heat maps. You can save your graphs and even embed them into your web pages like I did below (click on the graph and it will take you to the site with the data). I will probably do a more thorough post about this on my Found Data blog but take a look and try it out.
Curriculum Tags: MBF3C, MDM4U, MAP4C
https://plot.ly/

Ever buy Lego's by the pound? Well thanks to @rjallain we now have data and analysis to show how much each of those bricks cost. It was this post that introduced me to Plot.ly
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://www.wired.com/2016/12/heres-much-lego-brick-stepped-worth/

If you are looking for a super rich data set to show students the power of analyzing data, look no further than the bike share data from NYC.  After over 10 million rides there is a wealth of data in all forms. Bar graphs, scatter plots, periodic modelling, dynamic representations and more. Though you can't do much actual data manipulation, you can do a lot with inferring from graphs.
Curriculum Tags: Gr7, Gr8, MBF3C, MPM1D, MFM1P, MDM4U, MAP4C
http://toddwschneider.com/posts/a-tale-of-twenty-two-million-citi-bikes-analyzing-the-nyc-bike-share-system/

I like card sorts. They are a simple way to have students practice skills in a way that is a bit more fun than a worksheet. This one from @mathequalslove is dealing with inequalities.
Curriculum Tags: MHF4U
http://mathequalslove.blogspot.ca/2017/01/inequality-card-sorts.html

I love the title of this post from @benorlin "The Catchy Nonsense of "Two Negatives Make a Positive"". The act of giving students things to memorize instead of helping them understand is a common practice in math classes. But maybe this post will help a bit.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P

Though I am not a huge fan of their music (it's fine but it just doesn't do much for me) but OK Go have created a cottage industry of awesome video making. Their latest video for their song "The One Moment" uses some super high speed cameras (4000 frames per second) to actually shoot the entire video in a matter of seconds. See it below, then watch the math behind making it work. Lots of rates of change needed here. Watch the music video, then the math bit and then the behind the scenes stuff below
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://blogs.scientificamerican.com/roots-of-unity/math-with-ok-go/

Thanks to @StandupMaths here are some numerical facts about the number 2017 to ring in the new year. This reminds me that we can have students do a lot of number manipulation around just about any value. Have some of your students verify some of these facts (for fun)
Curriculum Tags: All

Some of your students may still watch TV (some of my own kids only stream now) but here are some neat visualizations of 50 popular TV shows (Modern Family is below) and how their viewership varies across the US.
Curriculum Tags: MDM4U
http://www.nytimes.com/interactive/2016/12/26/upshot/duck-dynasty-vs-modern-family-television-maps.html

Some times a good visualization can help students understand a concept better. The Internet is always there to help.
Curriculum Tags: MCR3U, MCF3M, MHF4U

I think it's a good exercise to do with students from @Rogonic. Give them data and ask them what type of graph they should make?
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U, MAP4C
https://learnandteachstatistics.wordpress.com/2016/12/09/which-graph-to-use/

Another from @BenOrlin. This time his take on the biggest (math) news stories of the year. Follow the link to see them all.
Curriculum Tags: All

Thanks to @MrAspinall for pointing out this fun app http://swirlly.com/ to show the beauty in geometrical mathematics with this throwback to Spirographs.
Curriculum Tags: All