Michael F. gave us a demo of what he calls “Naked CRC” or “Ironman CRC”. This is a technique that he uses to explain systems visually, using motion and spatial relationships. It’s a bit hard to explain completely textually, so if you ever get the chance have him demonstrate it for you.

Basically, the technique calls for using blank cards put out on a flat surface, grouping them and overlapping to illustrate concepts. Cards or groups of cards can be moved around as necessary to illustrate concepts. This description feels even more vague now that I’ve written it out than it does in my head. Basically have someone who has seen the demonstration demo it if you’re curious.