The Relationship of Effective Schools Indicators and Changes in the Social Distribution of Achievement

This study focused on school effectiveness in terms of changes in the distribution of achievement across socio‐economic status (SES) for a cohort of 9700 students as they progressed from grade 1 to grade 3. The achievement/SES link was operationalized as the standardized mean difference in achievement (EFFSIZE) between samples of high and low SES students for 165 schools. EFFSIZE measures in reading and mathematics were analyzed in an hierarchical linear model which allowed an assessment of the impact of 13 school characteristics on initial (grade 1) status and, more importantly, on trends over time. The results indicate that, on the average, low SES students are at an initial disadvantage relative to their high SES peers in both subjects and that the difference widens across the first three grades. True school variance in slopes was found in mathematics but not reading, a result consistent with previous research. The school characteristics, which included six indicators based on the effective schools literature, were found to be ineffective predictors of these growth parameters.