This article describes the development and use of a norm-referenced instrument called the Healthy School Indicator Tool (HSIT) that was designed to assist educational professionals monitor their progress in addressing critical health issues in schools. Factor analyses of two administrations of the survey indicated a stable factor structure. In terms of reliability, both split-half and Cronbach's alpha analyses revealed adequate reliability of factors. In terms of validity, the survey appears to adequately cover critical school health issues and is able to discriminate schools that have been involved in comprehensive school health programs for varying amounts of time. (Contains 1 figure and 6 tables.)