Nowadays we face many challenges - climate change, armed conflicts, social inequality and health problems, among others. Through a PBL approach our students will create an imaginary country where they will integrate a community and play a role as active citizens. This country’s communities, except one, were affected by a problem - technology doesn’t work anymore. So, inspired by the traditional community life students will try to survive. Each community in this imaginary country will gather students from the different schools (international teams), who will try to find solutions (STEM activities) to the health challenges that will be presented along the school year. Each team will be tutored by a teacher who will guide the students on the collaborative activities. To celebrate World Health Day (April 7) the students will discuss the importance of SDG 3. The project activities will be developed on the TwinSpace alongside with an interactive presentation (final product).