This is the fourth edition of an annual report on trends in the well-being of America's children and youth. Part 1 of the report describes national trends for over 90 indicators of child and youth well-being based on data collected by the federal government. The information provided for each indicator includes one or more tables documenting recent historical trends and important population subgroup differences, graphics to highlight key trends and group contrasts, and accompanying text that describes the importance of each indicator and highlights the most salient features of the data. The indicators are grouped into five substantive areas: (1) population, family, and neighborhood; (2) economic security; (3) health conditions and health care; (4) social development, behavioral health, and teen fertility; and (5) education and achievement. Part 2 of the report examines changes in risk-taking among high school students from 1991-1997, while part 3 documents the co-occurrence of teen health risk behaviors. (HTH)