Peer aggression, victimization, and conflict are common occurrences during early adolescence. In the collection of articles in this special issue, several themes emerged, including the use of social psychological theory, individual difference variables, and social context. This article briefly reviews these articles and presents original data that examine microcontextual characteristics (i.e., context of specific events) of sixth and ninth graders' peer victimization. Students completed daily reports on 5 school days across 2 weeks. Adolescents' experiences were mostly public (i.e., witnessed by another individual) and perpetrated by a single student from the same grade. Adolescents were unlikely to receive help from others (less than half the time when a witness was present). Ninth-grade data suggest that friends are the most likely witnesses to help the target. Strangers to the target never intervened or tried to help. These findings are discussed in light of implications for prevention and intervention. (Published Abstract)