The general belief that Asian American adolescents are successful has led researchers to ignore variations in Asian adolescents' academic success. Using samples of Chinese and Filipino adolescents drawn from the National Longitudinal Study of Adolescent Health, this study examined whether differences between these two groups in acculturation, parent-adolescent attachment, and parental school involvement could account for academic achievement differences. Results revealed that Chinese adolescents generally performed better in school than their Filipino counterparts. Factors that predicted academic achievement were ethnicity, acculturation, and parents' academic involvement. An interaction was found between ethnicity and acculturation, indicating that acculturation is a predictor of academic performance among Filipino youth but not among Chinese youth. Cultural values in parent-adolescent attachment, acculturation, and parents' school involvement are discussed. (Contains 4 tables.)