The first post was about one of my favourite data sets for teaching why it is important to consider both numerical and graphical analysis. When studying Anscombe's Quartet you do all kinds of numerical analysis to find a bunch of data sets all have similar measures but when you look at them graphically they are radically different.

The second post is about the site Spurious Correlations. A site that scrapes the internet for data and then finds unrelated variables that are correlated with each other. The cool thing about the site is you can play with all the data sets to create your own set of unrelated variables that are correlated.

Curriculum Tags: MDM4U, MAP4C

http://found-data.blogspot.ca/2015/11/anscombes-quartet.html

http://found-data.blogspot.ca/2015/11/spurious-corrleations.html

If you use Google Docs a lot you might be interested in this post on four different add ons. Using formulas, equation editor, a graphing calculator and a CAS calculator.

Curriculum Tags: All

http://www.freetech4teachers.com/2015/11/4-math-add-ons-for-google-docs.html

What is an Ontario Math Links these days without some sort of reference to Desmos? @mathycathy in conjunction with @mr_stadel have shown that you can do some work with transformations on Desmos using the activity builder. Reflections and Dilatations of shapes

Curriculum Tags: Gr7, Gr8

http://www.mathycathy.com/blog/2015/11/desmos-activity-builder-not-to-be-missed/

And even more stuff on dilatations. This time from the guys at Sketchpad. They call them dilatation games where you are given challenges based on stretch factors. It's pretty neat and the challenges get more difficult as you continue through.

Curriculum Tags: Gr7, Gr8

http://blog.keycurriculum.com/dilation-games-assessment-thats-fun/

I think @mathletepearce may be gaining weight with all the chocolate bars he must have had to get rid of after this 3Act task on adding, subtracting, multiplying and dividing with fractions (and Kit Kat bars). Lot's of videos along with KnowledgeHook quizzes.

Curriculum Tags: Gr7, Gr8

https://tapintoteenminds.com/3act-math/gimme-a-break/

The fight continues regarding traditional vs active math learning. @Mathletepearce chimes in with some research on the benefits of active learning

Curriculum Tags: All

https://tapintoteenminds.com/lecture-learning-vs-active-learning/

While I was creating my post on Spurious Correlations, I came across this TEDx talk on the dangers of correlation

Curriculum Tags: MDM4U, MAP4C

https://www.youtube.com/watch?v=8B271L3NtAw

@standupmaths has been putting out a lot of videos lately. This one is of a power puzzle. It's kind of neat and you could easily use it when introducing the idea of powers and having students verify any of the relations.

Curriculum Tags: Gr8, MPM1D, MFM1P

https://www.youtube.com/watch?v=E5-pgBnGyzw

Ah yes. The proverbial "text message" question. So unrealistic any more, yet we keep asking it.

Curriculum Tags: MPM1D, MFM1P

https://twitter.com/ddmeyer/status/668919062697779200

```
In both plans, your teenager has bankrupted you by 8AM. pic.twitter.com/e31ogCJhnC
— Dan Meyer (@ddmeyer) November 23, 2015
```

And finally a very cool animated gif that would be an extension of the unit circle.Curriculum Tags: MCR3U

https://twitter.com/solvemymaths/status/669650667238088704

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Graphing Shapes https://t.co/8OKJ9LOPRo pic.twitter.com/viYPnmT13m
— solve my maths (@solvemymaths) November 25, 2015
```