Resumen
In the current context of unsustainability that we inhabit, education is considered to be a necessary pillar for social transformation towards sustainable development. The main goal of this research is to analyze the implementation of educational practical experiences of the education for sustainability programs from the perspective of teachers working in secondary schools in the Basque Autonomous Community. The analyzed schools are situated in different socio-economic and environmental contexts. The analysis also aims to diagnose the extent of knowledge on the 2030 Global Agenda of Sustainable Development Goals (SDGs) with a view to its future implementation. The study is based on qualitative tools such as in-depth interviews (38 interviews conducted at five secondary schools). For analytical purposes, the perspective of the teaching staff is adopted as they play an indispensable and determining role in education for sustainability. The main results showed that the involvement of the teaching staff, personal motivation and good leadership are essential for the success of the program, together with the support of school authorities. A stable teaching staff and a sense of identity with the project are decisive factors. In this sense, differences were detected between public schools and private schools that, to a certain extent, condition the difficulties faced by the teaching staff. Experiential activities, activities outside the classroom and a positive perspective on the subject are considered factors contributing to the success of the programs. SDGs were still largely unknown to the teaching staff but could provide a good framework for multidisciplinary education.