In the wake of a flurry of tetrices being constructed in schools all over the country (see this post about fractal Christmas tree worksheets, and this post featuring photos of completed trees), we’ve also been sent a video of a school group constructing an ambitious and impressive fractal structure, using envelopes cleverly folded into tetrahedra. The video is below, and features (eventually) a level 5 Sierpinski Tetrahedron, made from 1024 envelopes!
Via teacher Tim Dolan on Twitter.
You may remember Math52, a Kickstarter project from Mathalicious which reached its goal in June. This promised, “every week for a year we’ll create a short video exploring a unique application of math in everyday life”. Now the Mathalicious video series has launched with two videos, both less than two minutes in length, available via YouTube.
The first video, Tip Jar, explores tipping in restaurants.
When we go out to eat at a restaurant, it’s customary to tip as a percent of the total bill. But is this fair? And what are some other ways we might pay waiters & waitresses?
The videos are snappy and nicely produced. The Mathalicious website offers free lesson plans and materials to support the video in the classroom.
YouTube channel: Mathalicious: the Video Series.
‘Math52: A Fresh Way to Teach’ is a Kickstarter project currently seeking funding. The organisers offer the following promise: “Every week for a year we’ll create a short video exploring a unique application of math in everyday life.” The emphasis is on providing teachers with material to enrich their teaching. You can find out more by watching the video below and visiting the Math52 Kickstarter page.
Peter’s site is full of beautifully stark geometric/topological art
This is an old video I made showing how to make a Slinky look like a Klein bottle. It’s the easiest way of making a Klein bottle that I know of!
In honour of Felix Klein’s birthday, Matt Parker and Katie Steckles investigate the amazing surface which bears his name.