The aim of the ACT GREEN Erasmus+ project is to get students aged 9 to 12 to understand the impact of human activity on the balance of nature and to make them use more practices supporting sustainable development. The second goal of the project is to develop participatory education methods and, as a result, enhance pupils’ self-esteem, sense of appreciation, school motivation and social skills. When these goals are achieved, pupils become socially active actors, which for its part reduces the risk of exclusion. The project includes two schools from Finland and one from Romania, Greece, Italy and Portugal. The most prominent results of the project are developing pupil centered lesson plans and producing ideas for sustainable development in educational establishments. We hope our project raises inspiration and develops and processes our products forward.