Experiences from other countries suggest that it works well to introduce the PLC concept first in relatively competent and receptive schools. In a ‘change catalyst’ model, these schools would theoretically work towards systematically implementing ESD school-wide, eventually becoming demonstration sites of effective ESD that could support other nearby schools. This is to say that despite national policies and available resources or supports, it seems to be at the school level where ESD is either brought to life or not.