Curricular tracking is common in many countries, yet this school practice might have unintended consequences for students' attitudes toward school. We examined the changes in adolescents' school belonging among sixth graders placed in honors versus regular math, with academic identity as a mediator in this relation. Early adolescents (N = 322; 72% White; 164 girls) in the southeastern United States completed measures of school belonging and academic identity at the beginning and end of their sixth-grade year. With parent education, prior math achievement, and prior school belonging controlled, honors math placement predicted increases in school belonging from the beginning to the end of students' sixth-grade year, and this association was positively mediated by academic identity. Results of this study are important for further understanding the influences of tracking on students' motivational beliefs.