Background/Context: Researchers, policymakers, and practitioners undoubtedly concur that missing school deteriorates student outcomes. And yet, in evaluating the deleterious effects of missing in-school time, empirical research has almost exclusively focused on absences, and the scant amount of empirical literature on tardiness has focused on…

The increasing trend of placing students with disabilities in general education classrooms has raised questions among researchers, policymakers, practitioners, and parents about classmate peer effects on all students. However, little is known about the peer effects of classmates with disabilities on the outcomes of other students in the classroom;…

Researchers, policymakers, practitioners, and parents have assumed a positive relationship between school attendance and academic success. And yet, among the vast body of empirical research examining how input factors relate to academic outcomes, few investigations have honed in on the precision of the relationship between individual attendance…