  We present a way of teaching Einstein's special relativity. It starts with
Galileo's relativity, the learners know from previous lectures. The lecture
underlines that we can have three transformation equations for the space-time
coordinates of the same event, which lead to absolute clock readings, time
intervals and lengths (Galileo's relativity), to absolute clock readings but to
relative time intervals and lengths (up-to-date Galileo transformations) and to
relative clock readings time intervals and lengths.
