Friday, April 7, 2017

Math Links for Week Ending Apr. 7th, 2017

@MrOrr_Geek builds a neat context into a 3 Acts Task (see Act 2 below) that deals with direct variation. The context is that of who is the fastest texter. I bet kids would get a kick out of this and you could even have some texting competitions in your own class to collect more data. Regardless check it out, including the companion Desmos activity.
Curriculum Tags: MFM1P, MPM1D, MFM2P
http://mrorr-isageek.com/turbo-texting/

I was reminded of an older physical card sort that was used to create groups of 3 using quadratic relations. You had to match a graph, equation and table based on looking at the solutions of each set. So today I recreated it as a Desmos cardsort and for the rest of my Desmos activities, click here.
Curriculum Tags: MPM2D, MBF3C, MCF3M, MCR3U
https://teacher.desmos.com/activitybuilder/custom/58e791d2a3cb2342b3ec93a8

Some insights into why students mix up area and perimeter from @RobertKaplinski. The main idea is about contexts (or lack there of).
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
http://robertkaplinsky.com/students-mix-area-perimeter/

To give MC or not to give MC, that is the question. At least that is part of the question that @MarkChubb3 talks about on this post. He has some keen insights on how to answer MC questions and some counters to some common MC tips.
Curriculum Tags: All

There is no reason for mathematics to be nothing but inclusive. Check out this interview with a Trans mathematician
Curriculum Tags: All
https://blogs.scientificamerican.com/roots-of-unity/q-a-with-autumn-kent/

In the "it's never too late" category, a 67 year old man proves a long standing math problem in probability by being inspired while brushing his teeth. The context is about throwing darts at a target and although it has been conjectured, it had never been proven. Now it has thanks to the fact that you never know when or how you will be inspired (or how old you will be).
Curriculum Tags: MDM4U
https://www.quantamagazine.org/20170328-statistician-proves-gaussian-correlation-inequality/

Though the modelling here might be a bit too complex, it does tell us why mathematical modelling is important. Here Canadian mathematicians create a SIMS like program to save the bees. Thanks to @KMarkPet for pointing out this one.

Curriculum Tags:All

I have always loved those conditional probability questions about false positive when testing for a disease. Here @veritasium talks about this idea, conditional probability and more when dealing with Bayes theorem. Nice stuff.
Curriculum Tags: MDM4U

Dealing with problems having to do with position time graphs? You might like this little video. Thanks to @mathletepearce for this one.
Curriculum Tags: Gr8, MPM1D, MFM1P