Prof. Dr. Johannes Hartig
Head of Unit and Professor of Educational Measurement, Department of Teaching and Learning Quality in Educational Institutions, DIPF | Leibniz Institute for Research and Information in Education / Johann Wolfgang Goethe University Frankfurt
![Prof. Dr. Johannes Hartig](https://www.konsortswd.de/wp-content/uploads/Johannes-Hartig.jpg)
Photo: Martina Sander-Blanck/WZB