What does progression in sense of period look like?

I’ve been interested in sense of period for a while now. The knowledge of what a period is like, its key features and quirks. I’m going to be running a workshop on this at SHP in the summer but I’m stuck. I’ve been trying to think about what progression looks like in this key skill.

I’ve made the following progression model:

Sense of Period


BUT I feel like I’m missing something. If you think I am please add a comment below or tweet me (@kenradical) and I will be eternally grateful. Thanks in advance!