The Quality Measurement Project was established in 1956 by the New York State Education Department to determine the feasibility of measuring quality differences between schools and of identifying variables related to these differences. In the latest revision of the project, begun in 1964, 99 representative school systems, excluding the New York City school system, administered tests at grades 5 and 8. Distinctions were drawn between national and state norms on the Iowa Tests of Basic Skills and the Lorge-Thorndike Intelligence Test. Comparisons were made between school system groups based on system size, average I.Q., and average level of mother's education, father's education, and father's occupation. Likewise student groups were compared on I.Q., mother's education, father's education, and father's occupation. As a result of these studies and further correlations, three methods of school system evaluation are suggested: comparison of school system average score with several state subgroup norms, comparison of local subgroup average scores with similar state subgroup scores, and the prediction of a local average score by use of regression analysis and a nomograph. The study is supplemented with comprehensive graphs and illustrations. (DG)