Principals (policy makers) have debated the progress in U.S. student performance for a half century or more. Informing these conversations, survey agents have administered seven million psychometrically linked tests in math and reading in 160 waves to national probability samples of selected cohorts born between 1954 and 2007. This study is the…

The purpose of this study was to test bidirectional relationships between (cyber)bullying and (a) bonding to school and (b) bonding to teachers. These relationships were examined while controlling for traditional and cyberbullying victimization, as well as gender and age. The sample consisted of 2,128 Belgian early adolescents, who participated in…

Numerical understanding and arithmetic skills are easier to acquire for whole numbers than fractions. The "integrated theory of numerical development" posits that, in addition to these differences, whole numbers and fractions also have important commonalities. In both, students need to learn how to interpret number symbols in terms of…

The objective of this article was to investigate the prevalence and psychological correlates of binge eating among adolescents. Self-report questionnaires were administered to a community sample of 708 adolescents (M[subscript age] = 14 years). Adolescents reporting loss of control over eating (17% of the sample) reported more eating pathology and…