The purpose of this study was to examine the degree to which academic achievement in U.S. schools could be explained by several indicators of belongingness (i.e., close teacher-student relationships, peer acceptance, school liking, low levels of loneliness in school and positive perceptions of peers) and school engagement. For this study, data…

Two-level data sets are frequently encountered in social and behavioral science research. They arise when observations are drawn from a known hierarchical structure, as when individuals are randomly drawn from groups that are randomly drawn from a target population. When the covariance structures in the group level and the individual level are the…