“STEM in our school” brings together students of different European countries in order to boost their creativity within specific projects aimed at improving their own school. Students from each school will choose particular improvement projects. Each project will be presented, discussed, shared and developed with the help of European peers. Some of the projects will deal with Science, Technology, Engineering, and Mathematics, but being motivated in including as many ideas as possible, we changed the acronym STEM in “Serious Thinking Enhances Minds”. Indeed, our objective is to get involved as a whole school community.