The study tested the hypothesis that there are sex differences in the pathways to mathematical development. Three-hundred and 42 adolescents (169 boys) were assessed in various mathematics areas from arithmetic fluency to algebra across 6th to 9th grade, inclusive, and completed a battery of working memory, spatial, and intelligence measures in…

This cluster randomized controlled trial evaluated the efficacy of the CHAMPS classroom management program on the social behavioral and academic outcomes of a large diverse sample of middle school students within an urban context. Participants included 102 teachers and 1,450 students in sixth to eighth grade. Two-level hierarchical linear models…

The effectiveness of an experimental middle school fraction intervention was evaluated. The intervention was centered on the number line and incorporated key principles from the science of learning. Sixth graders (N = 51) who struggled with fraction concepts were randomly assigned at the student level to the experimental intervention (n = 28) or…

We examined the mediating role of students' interpersonal and academically related social goals in linking students' perceptions of teacher and peer personal and academic emotional supports to their classroom behavior (prosocial, social responsibility) in a sample of young adolescents (n = 3,092) from 7 schools from the mid-Atlantic, Midwest, and…

Two longitudinal studies conducted in Israel examined antecedents and outcomes of teacher depersonalization, a relatively understudied dimension of teacher burnout. Study 1 explored the outcomes of depersonalization. We predicted that depersonalization would predict classroom disruption, and that an aspect of intrinsic orientation for teaching,…

The authors examined the differential effects of prior academic achievement, psychosocial, behavioral, demographic, and school context factors on early high school grade point average (GPA) using a prospective study of 4,660 middle-school students from 24 schools. The findings suggest that (a) prior grades and standardized achievement are the…

The current study was designed to examine the ways in which perceived behavioral norms among grade mates and school social climate vary across the transition to middle school. The main goals of the study were to test whether Latino students may be more sensitive to the school social climate than White students and whether perceived behavioral…

The current study presented 1,933 adolescents from 13 schools with a scenario about a hypothetical peer's plan to "do something dangerous" at school and asked how likely they would be to respond with four different actions: intervene directly, tell a teacher or principal, discuss it with a friend but not an adult, and do nothing. High school…