This chapter presents the project “Smart Energy Smart Schools” (SENSOr), which develops projectoriented learning environments on the topic of energy in public school buildings. The project builds bridges between education for sustainable development and digitalization. In the chapter, three different educational modules, the environmental measuring station, the history of light sources, and the planetarium are dealt with in more detail. They show a useful connection between ESD and digitalization or digital media. Another focus is the evaluation of the first feedback from the students and teachers. This leads to the formulation of initial theses that can be derived from this. Finally, various opportunities and challenges that arose on an individual and institutional level during the implementation of the project are described.