Ever since I started playing with GeoGebra I've been wondering about making a space - time diagram. This is one of the more tricky bits in the new relativity option so would be great if students could build their own simulations to get an understanding of how it works. It actually wasn't that difficult to make so I'll write some instructions tomorrow. I may have enough space left today but I've run out of time. Anyway here it is:

The worksheet is now finished, enjoy

Space - time diagram (GeoGebra)