An extensive search of the literature and existing programs was undertaken to identify instruments that were being used to measure school effectiveness. Twenty-four instruments are currently available and are critiqued in this publication. Each critique reports the format and components of the instrument, its intended purpose and uses, reliability and validity information, distribution information, the supplemental materials available, and a description of its content. Four additional instruments in preparation are listed. This report also lists the districts using each instrument, and related instruments. (BW)