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School Composition and Contextual Effects on Student Outcomes


by J. Douglas Willms - 2010

Background: Findings from several international studies have shown that there is a significant relationship between literacy skills and socioeconomic status (SES). Research has also shown that schools differ considerably in their student outcomes, even after taking account of students’ ability and family background. The context or learning environment of a school or classroom is an important determinant of the rate at which children learn. The literature has traditionally used school composition, particularly the mean SES of the school, as a proxy for context.

Focus of Study: This study examines the relationships among school composition, several aspects of school and classroom context, and students’ literacy skills in science.

Population: The study uses data from the 2006 PISA (Programme for International Student Assessment) for 57 countries. PISA assesses the knowledge and life skills of 15-year-old youth as they approach the end of their compulsory period of schooling.

Research Design: Secondary analyses of the data describe the socioeconomic gradient (the relationship between a student outcome and SES) and the school profile (the relationship between average school performance and school composition) using data for the United States as an example. The analyses demonstrate two important relationships between school composition and the socioeconomic gradient and distinguish between two types of segregation, referred to as horizontal and vertical segregation. The analyses discern the extent to which school composition and classroom and school context separately and jointly account for variation in student achievement.

Findings: The results show that school composition is correlated with several aspects of school and classroom context and that these factors are associated with students’ science literacy. Literacy performance is associated with the extent to which school systems are segregated “horizontally,” based on the distribution among schools of students from differing SES backgrounds, and “vertically,” due mainly to mechanisms that select students into different types of schools.

Conclusions: An understanding of socioeconomic gradients and school profiles for a school system is critical to discerning whether reform efforts should be directed mainly at improving the performance of particular schools or at striving to alter policies and practices within all schools. Both horizontal and vertical segregation are associated with lower student outcomes; therefore, we require a better understanding of the mechanisms through which students are allocated to schools. When the correlation of school composition with a particular contextual variable is strong, it calls for policies aimed at increasing inclusion or differentially allocating school and classroom resources among schools serving students of differing status.



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Cite This Article as: Teachers College Record Volume 112 Number 4, 2010, p. 1008-1037
https://www.tcrecord.org ID Number: 15658, Date Accessed: 10/19/2019 9:36:57 PM

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About the Author
  • J. Douglas Willms
    Canadian Research Institute for Social Policy, University of New Brunswick
    E-mail Author
    J. DOUGLAS WILLMS is professor and director of the Canadian Research Institute for Social Policy at the University of New Brunswick. He holds the Canada Research Chair in Human Development, is a fellow of the International Academy of Education and the Royal Society of Canada, and is a member of the U.S. National Academy of Education. He played a lead role in developing the questionnaires for the OECD’s Programme for International Student Assessment, and recently he and his colleagues designed the Early Years Evaluation, an instrument for the assessment of children’s developmental skills at ages 3–6, and Tell Them From Me, an evaluation system for the continual monitoring of school climate and student engagement and wellness.
 
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