Their ‘fertile ground rule’ requires that schools interested in participating in the programme submit an application endorsed by at least two teachers, as well as the principal. The application process helps to ensure a minimum level of commitment, as well as ensuring that there are a sufficient number of interested parties in the school to give the programme life. When training is provided in this context (typically at least twice per year), it occurs alongside a number of programme support structures, which reduce barriers to teachers implementing what they have learned.