Trying to explain some things…
@jack I'd add a chirality indicator centered on the higher grades. Round arrow for the bivector and helical arrow for the trivector.
@log I started that way, but found it too visually busy. The idea is to explain that rotation follows the direction of the head-to-tail arrows, which also makes it easy to explain how wedging in the other direction reverses the arrows.
@jack Well, I guess sometimes one has to do it the wrong way first, just to get the taste of it.