Abstract
Early adolescents'sense of classroom belonging and support-of being liked, respected, and valued by fellow students and by the teacher-was investigated among 353 sixth-, seventh-, and eighth-grade middle school students. Focusing on one academic class, students completed scales of classroom belonging and support, expectancies for success, and intrinsic interest and value; course grades and effort ratings were obtained from English teachers. Each of three belonging/support factors identified by principal components analysis contributed significantly to explaining variance in expectancies and value, with teacher support having the most consistently substantial influence across student subgroups. The strength of association between support and motivation dropped significantly from sixth to eighth grade. Teacher support was more closely related to motivation for girls than for boys. Expectancy was the primary predictor of class effort and grades. These findings underscore the importance of belonging and interpersonal support in fostering academic motivation and achievement.