This handbook provides information about gangs for education professionals working with immigrants. As the introduction makes clear, gangs are one of the many problems that newly arrived immigrants face in their neighborhoods and at school in the United States. Following the introduction, the first section describes the types of gangs including social gangs, delinquent gangs, and violent gangs. The second section explains gang ethnicity for the following groups: (1) Latino gangs; (2) Black gangs; (3) predominantly White gangs; and (4) Asian gangs. The third section lists and discusses reasons for gang membership, which include identity, protection, fellowship, and intimidation. A general profile of gang-related youth lists family, personal, community, and school related indicators. Examples of gang activities are described, including drive-by-shootings, graffiti, robbery and aggravated assault, and drug use. A chart that is designed to show youth the long-term negative educational and life consequences of gang membership is presented. Also listed are ways teachers can help, gang slang with "translation," common gang hand-signs, and selected community resources. (JB)