Background: Assigning students to different school tracks on the basis of their achievement levels is a widely used strategy that aims at giving students the best possible learning opportunity. There is, however, a growing body of literature that questions such positive effects of tracking. Aims: This study compared the developmental trajectories…

This study analyzed the Tertiary Admission Examination and Australian Scholastic Aptitude Test results for 264 pairs of 17-year-old monozygotic and dizygotic twins in Western Australia to determine if examination performance is influenced by environmental or genetic factors. Purely environmental models are rejected as inadequate explanations of…