I just recently did a level 3 workshop and although – strictly speaking – we mostly stuck to the script on assessment, there was a bit of time devoted to unit planning. Whether online, onsite, or in-house, this invariably leads to huge arguments about significant concepts, and this time was no different.
By way of an example I can share that one of the participants suggested as a significant concept for a unit on physics “inertia is a resistance to a change in the state of motion”.