## Friday, December 20, 2013

### Math Links for Week Ending Dec. 20th, 2013

I am always looking for a good set of data. And this time why not make it holiday themed. That is, what is the probability that there will be snow on Christmas? Based on 30 years of historical data, NOAA has created a probability map of snow. Its important to not confuse this with a forecast. Since its based on historical data, that is why its just a probability map. But now to the data. All of it was from this database. Have fun.
Curriculum Tags: MDM4U
http://io9.com/will-your-city-see-snow-on-december-25th-1481911999

I totally forgot about Sketchpad's feature that allows you to embed sketches on webpages (I used to give workshops on it many moons ago). That being said, here is a nice open ended question dealing with linear equations. Well done.
Curriculum Tags: MPM1D

Perfect for composite volume.
Curriculum Tags: MPM1D, MFM2P
http://www.mathycathy.com/blog/2013/12/texas-sized-snowman/

This is interesting. Domain and range are those things that sometimes we gloss over (perhaps because they are so abstract), but take a look at this strategy to help students understand how to define them. As it is with many things, sometimes if we trick kids we can get our points across more effectively. In this case the tweak is to incorporate a toy and a scenario to help kids visualize domain and range properly.
Curriculum Tags: MCR3U, MCF3M
http://squarerootofnegativeoneteachmath.blogspot.com/2013/12/domain-range-from-graph.html

I got a mention on the Math Disk blog. Just sayin.
http://mathdiskmedia.wordpress.com/2013/12/07/bloggers-and-tweeters-recommend-mathdisk/

I have never heard of shape or figure of constant width. At least never thought about it in terms of something other than a circle. But Numberphile has. And they are more than happy to tell us about it.
Curriculum Tags: Gr7, Gr8

I thought this was a nice graphical representation of some crazy weather data.
Curriculum Tags: Gr7, Gr8