Modern behavior-genetic studies of twins in the United States, Australia, Scandinavia, and the United Kingdom show that genes account for most of the variance in children's reading ability by the end of the 1st year of formal reading instruction. Strong genetic influence continues across the grades, though the relevant genes vary for reading words…

TIMSS (Trends in International Mathematics and Science Study) is an international assessment of mathematics and science at the fourth and eighth grades that has been conducted every four years since 1995, with the most recent assessment in 2011. PIRLS (Progress in International Reading Literacy Study) is an international assessment of reading…

Based on theory and research, social aspects like friendship and sense of relatedness are fundamental in the development of children's cultural identity and achievement of outcomes. It is argued that this is a motivational aspect often neglected in research studies focusing on students' motivation and learning. Theory and research on motivation…

The cultural capital in families, more specifically, the educational level of parents, has during the last decades been shown to be the most important dimension of socioeconomic influence on school performance in many countries. Less is known about the factors that actually mediate this influence. The aim, therefore, is to investigate the relative…