This study explored differential patterns of variables at 7 and 9 years of age that predict teacher evaluations of academic and social performance at 15 years of age. A total of 101 Icelandic school children were assessed on a variety of variables at ages 7, 9, 12, and 15. Only two variables significantly entered into the regression equation predicting academic grades. Friendship reasoning at 9 years and Raven IQ at 7 years accounted for nearly 40% of the variance in grades at 15 years. Three variables significantly predicted teacher ratings of 15-year-olds' social behavior. Friendship stage at 9 years, SES at 7 years, and perspective-taking at 9 years accounted for almost 25% of the variance in social behavior at 15 years. It was concluded that teacher ratings of disparate domains such as academic performance and social skills are neither non-overlapping nor isomorphic phenomena. (RH)