Education for sustainable development establishes the need for change within education; in particular, teacher education is recognised as a priority for reorientation towards sustainability needs. The Ubuntu Network is an action research programme, focusing on supporting teacher educators to explore the integration of development education and education for sustainable development into their programmes and professional practice in Ireland. From 2006 to 2008, 22 action research projects were implemented within nine post-primary teacher education programmes in Ireland and collectively published in an e-book. A systematic review of these projects was undertaken to identify emerging themes with a view to informing future work of the Ubuntu Network, and to guide the practice of mainstreaming education for sustainable development. These themes are described in this paper and demonstrate an evolution of pedagogical approaches, centring on ethical values and identity work. (Contains 3 notes.)