Cooperation framework and processes to be followed by educators across the school curriculum and agents at a community level: This document provides guidelines: a) for diverse educators (maths, language, literature, physics, physical education, arts education, music) and schools’ directors on how to establish effective cross-curricular collaboration to mainstream SEE in schools; b) educators with external agents (CSOs, parents, community members, artists) following an extracurricular approach, to promote outdoor school artistic activities, non-formal learning and application of skills.