This paper outlines a methodology that school districts can use to enhance the presentation of district-wide testing program results to administrators, school boards, teachers, and the public. Based on John Tukey's two way analysis methodology, it involves fitting this model: test score equals overall plus year plus grade plus cohort plus residual. The method is illustrated by working through the calculations for a small district with six years of test score data in math (mean standard scores for grades l through 6 on the Comprehensive Test of Basic Skills). Both graphs and tables are used to summarize effect sizes. The procedure can be used in three- and four-way analyses and for percentile as well as scaled scores. The methodology is also applied to data from a large California school district to illustrate its advantages for presenting clear and meaningful summary results. Although computer technology is indispensable for many aspects of data analysis, these paper and pencil calculations can be done quickly in consulting situations and provide a familiarity with the data which can enable investigative insights. (BS)