Friday, September 13, 2013

Math Links for Week Ending Sept. 13th, 2013

I am not sure how long this has been around but it seems to be a repository for all of the in house created sketches for GSP. Very inviting site and these sketches really exploit the power of Geometer's Sketchpad. There is stuff for all grade levels and even an indicator for those sketches that are iPad friendly.
Curriculum Tags: All

Despite the title of this TEDx talk (Why Math Instruction is Unnecessary) I like how John Bennett takes us on his journey of discovery that much of the math that we teach is basically just a construct of our curriculum and not really necessary for everyday life. But the real focus of his message is that problem solving and critical thinking are.
Curriculum Tags: All

Many have long said that mathematics was the way to a high paying job. Well now I guess we have the data to prove it. The US Census has always asked about income and level of schooling but in their most recent surveys they have also asked what people's majors were. The Planet Money people have a great podcast on the results (long and short versions below). And the survey says: Applied math (engineering, computer science etc) seems top the list. What's at the bottom? Psychology. A couple of things that resonated with me about this were a) that, in general, it didn't matter where you got your degree and b) it really had more to do with supply and demand. If you want the actual pdf of the full study click here.
Curriculum Tags: All
Long version
Short version

I am way behind on the I Speak Math blog posts but this one about how now there are more #mathchat had a Twitter chat about the math topic of the day. Now there are these more specific chats that go on. From middle school math all the way to calculus and statistics. Take a look here for your favourite topic.
specific "chats" about math on Twitter now. For a while every Monday and Friday (I think)
Curriculum Tags: All

Another great TED talk about visualizing data. Chris Jordan is an artist who creates social commentary art that is often more than it seems (when you look closely at it). For example an image of the Titanic made of 67000 images of mushroom clouds (equal to the number of metric tons of uranium/plutonium being stored temporarily around the US). Check out his website ( to be able to zoom into his works (there are a lot of them). Here is a perfect way to mix social justice and data management.
Curriculum Tags: MDM4U

"Would you rather...." is a blog that specializes in posing questions that asks the reader to make a choice of two similar situations and use math to justify that choice. There are a lot of different math topics that could be used here but it seems many fit into the Number Sense strand (I could be wrong here as I just skimmed the site). None the less these are great starting points for math conversations.
Curriculum Tags: Gr7, Gr8, MFM1P, MPM1D

These math "mysteries" are all really attainable for many students to understand (ie they can easily mechanically verify them) but they are some of the most famous unproven theorems. A neat way for students to see how proving something definitely can be very difficult. Included are the Goldbach Conjecture, Perfect Numbers and Mersenne Primes (plus people have suggested others)
Curriclum Tags: All

I like this App to visualize Factoring from NCTM's Illuminations. Too bad it doesn't work on an iPad but its a nice visualization
Curriculum Tags: Gr7, Gr8

Here is a great way to introduce FOIL in secondary and in elementary I like the suggestion made by @emergentmath "Here's your lesson plan tomorrow: Stop the video after 1:30 and ask "why does this work?""
Curriculum Tags: Gr7, Gr8, MPM1D, MFM2P

I don't think you will ever need to describe how a Venn diagram works if you just show this example. There are more on the main site ( though not all dealing with data.
Curriculum Tags: MDM4U

Redbull sponsored a contest to take the image of extreme thrill seekers in action. Some cool pix but this one fits quite well with modelling quadratics. Just import this into GSP or Geogebra and model the strobed snow boarder with a quadratic. Note that it may look kind of flattened out but that has to do with the fact that the snow boarder is rotating in flight. But it's the centre of mass that follows a parabolic arc.
Curriculum Tags: MPM2D, MFM2P, MBF3C, MCF3M, MCR3U

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