This report reviews current statistics on the state of girls' lives in the United States at the end of the 20th century. Six chapters cover: (1) "Framing Gender, Identity, and Adolescence" (trends in research on adolescent girls, exploring identities, how girls are doing, and conditions that support or hinder girls' healthy sense of self); (2) "Health" (exercise and sports, body image and eating disorders, HIV/AIDS prevention, depression and related concerns, substance use, and access to health care); (3) "Sexuality" (portrayals of girls' sexual activity, pregnancy and reproductive decisions, and access to information and resources); (4) "Violence" (victimization, sexual and physical abuse, sexual harassment, and participation in violence and crime); (5) "Schooling" (representation of girls in educational research, girls' achievement, curricular issues and academic programs for girls, single sex versus mixed sex education, sexuality education, leaving school/college attendance/dropping out, and conditions that support girls' educational experiences); and (6) "Economic Realities" (economic conditions in families and impacts of welfare reform legislation). Two final sections present "What Do Adolescent Girls Need for Healthy Development?" and "Looking Ahead: Developing a New Research Agenda." (Contains 216 bibliographic references, notes, and nationwide member center descriptions.) (SM)