## Friday, November 4, 2016

### Math Links for Week Ending Nov. 4th, 2016

Hey, this is my 200th Ontario Math links. it's hard to believe that I've been doing this for almost 4 years. Thanks for all the encouragement along the way. And what a good week to see this featured link. One of the things that has really taken off in the four years I've done this blog is all the sharing and this one interactive slide from @Jstevens009 does a great job of showing a lot of the great (and big) projects that you all have shared. I even learned of a few I hadn't heard of before (Number Talk Images from @Pierre_Tranche and Counting Circles from @JessicaShumway & @wahedahbug) Way to go #MTBoS
Curriculum Tags: All
Estimation 180, Fraction Talks, Number Talks Images,  Graphing Stories, Math Talks, Daily Desmos, 101qs, Would You Rather, WODB,  Open Middle, Counting Circles, Visual Patterns

I've been adding to my Rational Functions activities. This time with an investigation into the properties of the function f(x) =  (ax+b)/(cx+d) . The idea is that students would do this as homework that walks them throught the properties and then you as the teacher consolidate it the next day. It's a bit long but should only take them between 30-50 min.
Curriculum Tags: MHF4U
https://teacher.desmos.com/activitybuilder/custom/5812204c56f79a01065dc84d

Another cool Desmos activity that has nothing to do with graphing. This one is from @RilesBlue and it's about putting fractions on a number line. And as an added bonus, there are full lesson descriptions of what you will likely see when you run this.
Curriculum Tags: Gr7, Gr8

A new 3Act task from @mathletepearce. This time on percents and proportional reasoning dealing with discounts on purchases. Click on the link for all the videos and instructions.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://tapintoteenminds.com/3act-math/calvins-clearance/

Here's a nice little Desmos card sort on Sampling Techniques from @Kmanna15
Curriculum Tags: MBF3C, MDM4U
https://teacher.desmos.com/activitybuilder/custom/581b1f3b2d2c37170b22e0a9#

A couple of opinions that are fairly similar on the misplaced "need" to make all the math in math class relevant to real life. The first is from @MathGarden and speaks to the beauty in math as the real goal.
Curriculum Tags: All
https://bullshit.ist/stop-selling-math-for-its-usefulness-d9143e80d78d#.f6neb5eey

And the second is from @NatBanting and is a bit more direct in speaking about the problem with forcing the connections but says a lot of the same things.
Curriculum Tags: All
http://musingmathematically.blogspot.ca/2016/11/real-world-attack-on-relevance.html

Seeing as this week @JoBoaler was speaking at the OAME Leadership conference, then I guess it is very timely to see her write an article talking about why math education doesn't add up in the US.
Curriculum Tags: All

Here's a great video that could be a starter to a question dealing with circumference. Maybe something where you have a log with a certain diameter and are pealing off layers of a certain thickness to determine how much you might get in length.
Curriculum Tags: Gr8, MPM1D, MFM1P

Does it matter that the image is taken at a perspective if you are trying to find the "centre" of the triangle?
Curriculum Tags: Gr7, Gr8

I love this graph. Can you us it to predict the number of plays this Christmas? Looks like it could be an exponential relationship. You can see the data yourself if you go to the video and click on More then Statistics
Curriculum Tags: MCR3U, MDM4U, MHF4U, MCT4C
A very cool interactive visualization on the colours on the history of Crayola crayons. And don't forget to click the arrows on the top to see some of the other visualizations.
Curriculum Tags: MDM4U
https://public.tableau.com/en-us/s/gallery/history-crayola-colors

Here's a cool image you could use when talking about the surface area of spheres.
Curriculum Tags: MFM1P, MPM1D