Dear World,
Tonight I’ve put together a colourful tetrahedron net for you all that can hang in your Math display area. Feel free to use the tetrahedron in any way will aid your students’ education. (or help them get through those bloody, bloody stupid, dumb, rah, rah, rah tests)
Yes… I drew all the triangular faces myself in a program called Inkscape and for those who asked I used a Wacom tablet to get the drawing control. NB I tell my classes that, ‘drawing with a mouse is like picking your nose with your elbow’. OK, they are 10… they think it is funny 
cheers
Adrian