They’ve got a rigorous training plan:

To become a master composter requires 18-23 hours of classroom instruction, two field trips, plus 15 hours of supervised community training, and 15 hours of independent projects/community service.

They also have pages on compost science, so I now know that isopoda aka slaters or woodlice are called sow bugs. Why am I so interested in slaters? Probably because my first compost bin turned into a restaurant for slaters. Here’s some pictures of isopoda / slaters / woodlice / …