The 2007 Bondar Report, "Shaping Our Schools, Shaping Our Future," generated a vision for environmental curricula in Ontario. It has been the basis for the mandated framework introduced in 2009 by the Ministry of Education for environmental education (EE) in all Ontario schools. Based on our research and personal reflections, this paper provides a summary of the recent developments concerning EE curricula in Ontario's schools. It also identifies the key institutional elements which contribute to and influence the course of EE implementation and focuses on their role in the development of environmental curricula in the province.