Using a dataset that includes over 17 million students from across all 50 states, we estimate the causal impact of making structural transitions into middle school (in grades 4, 5, 6, or 7) on student math and reading achievement trajectories. This dataset provides an ideal opportunity to engage in the valuable scientific practice of conducting…

Overall, the research on the effectiveness of single-gender education is inconclusive. However, research also indicates that some benefits beyond academic achievement may be possible. These findings may be significant for middle school girls, who often struggle with social interactions related to adolescence that create barriers in successfully…

The often observed decline in students' self-perceptions across transition to secondary school after grade 6 is often attributed to students' entry to puberty. This study aims to examine whether lowered self-perceptions can be observed after transition in Germany which occurs after grade 4 and thus takes place before puberty. Fifth graders (N =…

A group randomized controlled trial tested the efficacy of the Friendly Schools program to reduce student bullying behaviour. This socio-ecological intervention targeted the whole school, classroom, family, and individual students to reduce bullying behaviour. Self-report data were collected in 29 schools over three years from a cohort of 1968…

This study examines the link between perceived peer victimization and academic adjustment in an ethnically diverse sample of 1,895 Grade 6 students nested within 108 school classes. It was hypothesized that students' academic self-efficacy mediates the (negative) link between victimization experiences and academic achievement outcomes. Multilevel…

The objectives of the study were to examine the characteristics of non-referred children with behaviour difficulties (BD) (such as verbal and physical aggression towards children and objects), aged 9-12 years and attending mainstream schools, and to compare them with children with no BD. The second objective was to evaluate the contribution of a…

The previous study demonstrated that the Chinese version of the PSSM scale was applicable for use by Hong Kong students, and in this study, the scale was also found to be workable for the measurement of Shanghai students' psychological sense of school membership. The only difference found in the 18-item PSSM scale distributed to Shanghai and Hong…

This is a comparison study of 244 early adolescents attending sixth grade at either an urban elementary school or an urban middle school. Utilizing four data collection instruments, it compares the adolescent groups' degrees of loneliness, levels of positive self-concept, academic competence, problem behaviors, and social skills. Results indicate…