The first section defines the problem of gangs in two papers. The first paper reviews the parameters of the problem of gangs and youth violence, along with some of the characteristics of gang life. The second article summarizes the means of identification and some terminology used by gang members. Section two contains three papers designed to provide an understanding of the gang culture. The first paper presents an interview with some individuals who assist the Cleveland public schools (Ohio) in their gang-related crises. Another paper considers the possibility that differences may exist in the basic thinking patterns of many antisocial children and youth; this may have implications for intervention programs. The third article in this section discusses cults as a specific type of "gang" that appeals particularly to a subgroup of vulnerable students. Section three addresses the challenge of gang prevention and intervention. First, a gang incident that occurred in an upper-middle-income school is described in detail, with a look at the reactions of school officials and the community. The second paper discusses the legal issues involved in search and seizure of contraband, a complex problem that daily faces many adults involved with youth. In the third paper, a Chicago police officer is interviewed; he describes the efforts that his partner and he have undertaken to prevent gang violence in two neighborhoods with heavy gang activity. Another paper presents suggestions for action, with recommendations for educators, schools, parents, and communities. Resources for additional information about gang problems and attempted solutions are listed.