Some notes on structure from "Teaching Drama" by Richard Courtney, Cassell & Company LTD, 1965.
Drama Periods have:
1. Exposition. Elements of Drama: beginning, middle, end, build-up, mystery, exciting happening or climax, ...
2. Group preparation.
3. Performances. Cycles of improvisation (orbit of a celestial body)
4. Discussion.
5. Polishing.
"The ultimate aim, of course, is to bring the child into contact with material which will deepen and broaden his experience of living . . . " (page 100) in this case where are we going with our mathematics? Narration of real or imaginary occurrences on our road to understanding mathematics.