It is a while since I bumped into videos that made my jaw drop. But the wind seems to have changed and they are cramming my screen for attention.
So first up, meet the magical Vi Hart and her Hexaflexagaons. Be warned she speaks really fast, but the beauty of video is that you can rewind it as many times as you like.
You can also watch the Hexaflexagons video with its' interactive transcript on YouTube, if you prefer.
My other favourite video (so far) is the one about the Fibonacci series. I love the way Vi uses real object to illustrate the concepts and gives many examples of where the patterns appear in nature.
You can also watch Doodling in Math: Spirals, Fibonacci and Being a Plant (Part 1 of 3) with its' interactive transcript on YouTube. I found this really useful when I was looking for a particular section of the video to replay. It was easier to scroll the text, click on the exact section I wanted, and the video would dutifully jump to the same spot. A great universally designed function.
For more Vi Hart videos visit the Vi Hart YouTube channel. And if you find one's you fall in love with, please post them belwo in the comments section.