Empirical studies and legal documents of school law highlight the importance of principals for school improvement. Professional development (PD) needs to be provided for principals in this field accordingly. This longitudinal study investigates effects of a PD program addressing principals’ self-reported skills that are related to school improvement. Participants are highly satisfied with the PD program and they report small to moderate changes of their leadership behaviour. Principals with little experience on the job report higher gains of their leadership than highly experienced principals. Implications for future research and professional development are discussed.

Schlagworte
principal professional development, evaluation research, effects of provessional development, longitudinal study, multiple regression