During 3 years, the SUSTAIN network coordinated by La main à la pâte (11 CPD providers in 10 EU countries, with extensive experience in IBSE) has developed, through collaborative work on 3 cross-cutting ESD topics (Education for Sustainable Development), an innovative IBSE-based “toolbox” on ESD for teachers and teacher educators, which can be used and adapted to local contexts in most European countries. Three handbooks have been edited on three topics: Food, Energy and Everyday Objects.