Vi Hart has produced an engaging pair of videos about hexaflexagons, the hexagons with 3 faces! The videos are below, and here is a link to a page with instructions and a template for building them… Have fun! Hexaflexagons Hexaflexagons part 2
Tagged: Vi Hart
Here’s another classic mind boggling video from Vi Hart about a very amazing number… The most amazing, ancient and singular number At a more basic level this idea could be used to introduce the idea of identities. Great stuff Vi! Thanks to @SamGWebster for bringing this to my attention.