This is the second in a series of briefs summarizing findings from the newest and most rigorous research related to racial and socioeconomic diversity in public schools. The studies on which this brief is based were published recently in three special issues of the peer-reviewed journal, "Teachers College Record," edited by Professors…

Reviews hierarchical linear models that have been developed to address problems of the measurement of change and the unit of analysis in educational research. Introduces a three-level hierarchical model that should constitute the basic paradigm for future quantitative research on student learning. (Author/BJV)

Presents a procedure for analyzing statistical data involving distributions that is more informative about causal and other relationships. Finds test scores were affected positively by increased time on task, teachers with higher educational attainment, and better school facilities. (CFR)

The National Education Longitudinal Study of 1988 (NELS:88) is a large-scale, national longitudinal study designed and sponsored by the National Center for Education Statistics (NCES), with support from other government agencies. Beginning in the spring of 1988 with a cohort of eighth graders (25,000) attending public and private schools across…