Book excerpt: This book explores innovative approaches to teacher professional learning, examples of teaching enacted in classrooms, and factors affecting the promotion of quality teaching in socio-scientific issues and sustainability contexts. Since educational settings and cultures influence teaching, the different approaches and perspectives in various cross-national contexts enable us to appreciate the diversity of different countries’ practices and provide insight into seminal approaches to socio-scientific issues-based teaching internationally. The book consists of three parts: innovative professional development programs, innovative teaching approaches, and issues relating to student engagement with socio-scientific issues and sustainability education. The book targets those who can be expected to develop curriculum, enact teaching practices, and facilitate teachers’ professional development in socio-scientific issues and sustainability education.