Gregory's Server@wim_v12e That sounds very ambitious. A few years ago, there was something a bit similar developed in economics, called Common Core, which sought to provide an alternative to the efficiency-focused market-fundamentalist approach generally taught in introductory classes.
If you haven't progressed too far in the multiple schools approach yet, it might be worth seeing what they did to bring on new programmes and stakeholders. I think it was successful - not really in my teaching area.
@mplouffe I'll definitely have a look. All I've done so far is created a new role that each school should have, with time to do the work. But in practice, even that fails because the heads of school are only paying lip service, they don't really free up time for that role.