Victimization in early adolescence can have severe negative consequences later in life. Friendships are especially important in this time period. The present study investigated friendship selection and influence (contagion) processes with regard to victimization, as well as prosocial and aggressive characteristics of victims’ friends. Using social network analyses (RSiena), we longitudinally analyzed data of five fourth-grade classrooms, including 185 students (56.8% girls; X ¯ age at Time 1 = 10 years old). Results showed that early adolescents who experience peer victimization were not likely to select peers with similar levels of victimization as friends but selected prosocial peers as friends. Moreover, friends did not become more similar over time in their victimization levels. Prosocial students selected similar peers as friends. The discussion highlights the relevance of fostering positive peer relations for targeting victimization and discusses the defending role of friends in victimization situations.

How the interplay between peer relationships and behaviors unfolds and how this differs between classrooms is an understudied topic. This study examined whether adolescents befriend or dislike peers whom they consider as aggressor or victim and whether these results differ in classrooms that received an intervention to promote prosocial behavior compared to classrooms without the intervention. The sample was composed of 659 seventh graders (M_age = 12.32; 48% girls) from nine intervention and seven control classrooms in eight schools in Santiago, Chile. It was hypothesized that adolescents in intervention classrooms would be less befriended and more disliked by classmates who considered them as aggressors, and more befriended and less disliked by classmates who considered them as victims, compared to control classrooms. Longitudinal multiplex social network analyses (RSiena) indicate that antipathies toward peers considered as aggressive and victimized were significantly lower in intervention classrooms than in control classrooms, but no significant differences were found for friendships. These findings suggest that the impact of an educational intervention may go beyond changing individual behavior and extend to the way peer relations develop in classrooms.

This paper investigates the validity of a national, standards-based teacher evaluation programme by examining the relationship between teachers’ evaluation results and their students’ learning progress. We used census achievement data that assessed the same cohort of students at the end of 8th and 10th grade. We applied multilevel modelling and calculated correlations between teachers’ value-added estimates and their results based on the evaluation system’s multiple measures of teaching quality, which include a portfolio of classroom teaching artefacts and a video-taped lesson, a peer interview, supervisor assessments and a self-assessment. Our study finds a medium-size positive relationship between value-added estimates in mathematics and teachers’ portfolio results, while relationships with the other instruments are weaker. Correlations are lower for Spanish, but showing a similar pattern across instruments. We also find significant yet weak relationships between value-added estimates and three of six emerging factors of teaching practice based on the evaluation’s portfolio data.

Educational research has shown that academic achievement and peer relationships are associated from early school years, where friends play a significant role in influencing students' school adjustment, attitudes, and behaviors. The present study examines how individual academic performance is associated with friendships among 240 5th and 6th graders. The information on students' friendships, academic performance, gender, popularity, and social preference was collected in a convenience sample from 8 classrooms of 2 private-subsidized schools in Santiago, Chile. Longitudinal social network analysis (RSiena) was used to study the co-evolution of academic performance and friendship dynamics, by assessing simultaneously selection and influence processes, and by incorporating social status covariates (popularity and social preference) as moderators of friendship selection and influence. Results showed that friendships were more likely to occur between same-sex peers and between students with similar social status. Regarding social influence, friends influenced individual's academic performance. Moreover, socially preferred students were more likely to be influenced by friends' academic performance, but the same did not occur for popular students. These results might suggest that socially preferred students' attributes (cooperation, reciprocity, and high-quality friendships) would facilitate the influence of academic performance. In contrast, popular students would be less sensitive to their friends' academic performance focusing instead on salient behaviors (e.g., aggression). The findings underline the importance of understanding social network dynamics in educational settings.