The effects of school inspections on school improvement have been investigated only to a limited degree. The investigation reported on in this article is meant to expand our knowledge base regarding the impact of school inspections on school improvement. The theoretical framework for this research is partly based on the policy theory behind the Dutch Educational School Supervision Act (the latter includes assumptions about how school inspections lead to school improvement). Interviews and a survey with school inspectors gave insight into (...) how school inspectors implement the Supervision Act and how they assess schools, and stimulate schools to improve. The results of ten case studies showed that all schools started to improve after a school visit. The innovation capacity of the school and the school environment do not seem to contribute to school improvement after school inspections. No effects were found on school-improvement processes of the number of insufficient scores that schools received from inspectors, the extent of feedback and suggestions for improvement, and the number of agreements. The provision of feedback about weaknesses, the assessment of these weak points as unsatisfactory, and the agreements between an inspector and the school regarding improvement activities do appear to make a difference in promoting school improvement. (shrink)

This article describes a theory about the ambition of most Inspectorates to realise 'school improvement through inspection'. Literature about a number of direct and indirect interventions, such as reciprocity, communication and feedback is used to build a theoretical model stating the relations between working methods of school inspectors, reactions of schools and resulting effects and side effects. Finally two types of inspections strategies are described that can be used in different types of schools. We expect schools with a low innovation (...) capacity and few external impulses to be helped best by a directive approach in which an inspector clearly points to the strong and weak points of the school, the probable causes of their level of functioning, and potential ways for improvement. The inspector should pressure the school to change by making written agreements on how to change and by asking the school to work out these agreements in an improvement plan. A school with a high innovation capacity and strong external impulses is expected to do better with a more reserved inspection approach. Inspectors only need to provide this school with some insight into their strong and weak points. (shrink)