M. Söll and S. Uzunbacak presented at the program workshop: "Quo vadis Vocational Teacher Education? Educating Teachers for Vocational Schools: Challenges, Starting Points, Interim Results" of the Quality Offensive Teacher Education at the University of Osnabrück (online), they gave the presentation "Focusing on Heterogeneity in the Development of an Economic Didactic Approach to Promote Lesson Planning Competence".