Follow-up Links
Geometry on other surfaces
These videos are worth watching if you are interested in geometry on other surfaces (eg the sphere), or the issues with mapping the globe on to a 2D plane.
https://www.numberphile.com/videos/5-sided-square
https://www.numberphile.com/videos/strange-map-projection
Bar Code Trick
Here are our resources to teach the method for the Bar Code Trick: www.think-maths.co.uk/bar-code-trick
The Birthday Paradox
A nice and tricky Nrich puzzle about matching birthdays: https://nrich.maths.org/problems/birthday-bet?tab=overview
A Numberphile video about the Birthday Paradox (goes into how to calculate the probabilities Zoe showed on the chart – which we didn’t do in the session): https://youtu.be/a2ey9a70yY0?feature=shared