Ideally, ESD-related professional development would be undertaken alongside complementary initiatives including those mentioned above, as well as curricular and examination reforms, linking training on ESD with re-certification or promotional pathways, school improvement programmes, ESD training for principals and so on. Additionally, such professional development could come with a requirement that participating teachers pass on their training in their home schools to help expand the reach of ESD training when resources are limited. The structure is flexible and can be formalised to include scheduled topics, chairpersons and presentations.