A directory of useful objects found on the web for teaching Maths.
https://www.youtube.com/watch?v=plooNCQjEuA
Design, Publisher, Curiosity Show, Video, YouTube
Drawing one kind of spiral with compasses is easy enough, but how do you draw other kinds? Rob shows a simple trick to let you draw an endless variety of spirals, much bigger than you could draw with compasses.
1 March 2016 Edit: 28 February 2016
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