The best buy in is people working on what to do together in their teams and feeling they have led that change. More likely to land in their classroom and stick

I think if it has to be done, the key is probably in selecting a very small amount of new content to deliver and then spending a lot of time collaboratively to apply it.

Exactly the approach we have, developing the clear 'why' together, teams having time to trial things out, discuss & feed back. We map out cycles of CPD, team time & review & reflect. It also links to our performance dev. cycles with agency the core aim! Allowing sufficient time is key too...