We use a natural experiment to show that the presence of an external examiner has both a direct and an indirect negative effect on the performance of monitored classes in standardized educational tests. The direct effect is the difference in the test performance between classes of the same school with and without external examiners. The indirect…

This paper reports on the final phase of a three-part study on the status of instructional supervision within several New York City public schools. In the first parts of the study the researchers found, through extensive use of surveys (questionnaires and interviews), that centralized educational reform had serious consequences for instructional…