This paper presents ten teaching scenarios based on Astronomy subjects, focusing on middle formal and informal education in the framework of European STEM4you(th) Project (Horizon 2020). Each scenario follows the STEM approach and has been formulated by combining the inquiry - based learning method with constructivism. The teaching material contains hands on activities, constructions, simulations, storytelling and creates a link between science and the labor market related to Astronomy and Space Science. Through these courses students learn astronomical subjects and through astronomy the processes of science. This course aims to motivate 14-16 year-old students to STEM disciplines, and enhance their scientific skills and their creativity. The final outcome of the project is an interactive platform where the produced educational material may be adopted by teachers throughout Europe.