In the past decade, variant inspection procedures have been implemented in the German federal states, setting different priorities in terms of objectives. For example, while Bremen focused only on school improvement, Berlin and Brandenburg focused equally on school improvement and control. Considering the differences in the inspection procedures, we investigate whether the variant designs lead to differing attitudes among school principals and teachers (N = 1589) towards the inspection procedure as well as to different school improvement activities. The results show more positive attitudes towards the inspection in Bremen. In all three federal states, cooperation and participation of students and parents increased after inspection. In Berlin and Brandenburg, schools’ self-evaluations increased. In the same two federal states, school documents and curricula were updated before the inspection, while in Bremen this occurred after the inspection. Teachers’ attitudes towards the inspection are slightly more critical in comparison with school principals.