Research Findings: Relying on a newly released national data set of kindergarten students from the 2010-2011 school year (Early Childhood Longitudinal Study-Kindergarten Class of 2010-2011), the findings suggest that having a greater percentage of same-needs classmates positively boosts both achievement and socioemotional outcomes among…

In evaluating the deleterious effects of missing in-school time, research has almost exclusively focused on absences, and almost no attention has been paid to tardiness. Hence, this study contributes a new dimension to the field by examining the effects of student tardiness on academic achievement. Employing an empirical model on a large-scale,…

This study evaluates the effects of classroom peers on standardized testing achievement for all third- and fourth-grade students in the Philadelphia School District over 6 school years. With a comprehensive individual-and multilevel data set of all students matched to teachers, classrooms, and schools, two empirical strategies are employed. The…

The authors explored how classroom gender composition moderated the relationship between having classmates with emotional and behavioral disorders (EBD) and peers' academic achievement in both kindergarten and Grade 1 classrooms. Given the behavioral and social-cognitive styles of girls, it was hypothesized that classrooms with a higher percentage…

Numerous studies have examined how grade retention can impede the academic success of those retained students. One uncharted line of research is the spillover effect that retained students may exert on their classmates. The purpose of this study is to evaluate this relationship for students in urban elementary school classrooms. To do so, this…

Background/Context: This article addresses the classroom contextual effects of absences on student achievement. Previous research on peer effects has predominantly focused on peer socioeconomic status or classroom academic ability and its effects on classmates. However, the field has been limited by not discerning the individual-level academic…