This article describes the implementation of a digital case-exploration tool and its use in teacher education. The cases were constructed according to empirically based psychological theories and represent school-related scenarios in which the students could choose among options for action. After selecting an action, its psychological consequences are presented in text or video including theoretical explanations how and why the selected action would lead to the presented consequences. We present first quasi-experimental evaluation data demonstrating the tool's usefulness regarding learning outcomes, students' active participation, and motivation.