[this would best be done with illustrations that would require an artist]

Developing a model from Lave's (& Wenger's) foundational text on "communities" of practice is essentially to be found in a few pages of Situated learning: Legitimate peripheral participation (1991) particularly pp. 29, 48-49, 95.

These pages mention one dichotomy: that between "newcomers" and "old timers." The emphasis is on "participation" and what happens when "legitimate peripheral participants" become "full members."

In the various vocabularies used to talk about the "communities" within which eventually takes place, more is added than just the initial distinction. So we now have

Implicit but not developed is the issue of recruitment:

By implication, wondering about the implicit aspects of the theory leads to further questions:

and more: