Schülerlabors (casually called school labs or informal science labs) as out-of-school hands-on laboratories for school students nowadays belong to the forefront of the out-of-school STEM Education for Sustainable Development (STEM-ESD). Their aim is to make the youth capable to design a sustainable future. By close collaboration with schools as well as by systematic training of preservice and in-service teachers Schülerlabors are efficient multiplicators: they can bring novel educational aspects and novel results of STEM R&D addressing sustainable development into schools and via schools into the society. Thereby a sustainable behaviour in the free time of the people is in the focus of the educational efforts as well as questions concerning possible professional activities. Contributions to scientific literacy, vocational orientation and to connectivity between school and university belong to the mission of Schülerlabors training future adults and their teachers to become conscious of Sustainable Development. Chemistry is of particular importance among STEM sustainability subjects, as is evident from the existence of the subject-specific discipline Sustainable Chemistry / Green Chemistry. A more sustainable, greener chemistry aiming at the utilization of renewable resources is a main research focus to reduce human environmental impact. Here two examples will be discussed: Omega-3 fatty acids from local plants (instead from fish oil) and Ionic Liquids as recyclable, tunable solvents for the dissolution and processing of biomass in the form of wood and its components to create alternative processes that are safer as well as waste- and additive-free. Both Schülerlabor topics emphasize the principles of green chemistry and demonstrate the chemical (i.e. not energetic) use of materials from renewable resources. Students and teachers after the activities become vectors of knowledge in green chemistry and messanger of soustainable development attitude.