One conclusion from my travels - UK, US, Canada, Australia - is that our global profession remains deeply scarred by decades of poor accountability-driven scrutiny dominated by delusional 'teacher evaluation' processes. The default teacher position is to be sceptical and resistant to observation processes and often PD itself. 'Just leave me alone' is a common starting point. It's requires a massive effort to build momentum around sustained PD and feedback cycles that people trust, opening themselves up enough to explore habit change.. Where it's happening it's magnificent; it feels like a triumph - but it also feels precarious; it doesn't take much to knock people off course. We're paying the price for all those years training up leaders to adopt the role of compliance checkers and 'quality assurers' rather than being true leaders of learning and teacher development. Takes real focus and changes in attitude to create the cultures of PD teachers crave.