This Kids Count report is the tenth to examine annually statewide trends in the well-being of Washington's children and focuses on child poverty and the needs of the working poor. The statistical portrait is based on indicators of child well-being in five areas: (1) family and community, including teen birth rate, teen pregnancy rate, births to unmarried mothers, and children living in out-of-home care; (2) economic well-being, including average real wages, per capita income, and child care cost as a percent of take-home wages; (3) education, including reading and mathematics achievement and the extent of the racial gap; (4) health, including child mortality from medical conditions, suicide mortality, percentage of 2-year-olds fully immunized, and low birthweight rate; and (5) safety and security, including juvenile violent crime arrest rate, firearms deaths, child abuse referrals, and motor vehicle accident mortality. Following a summary of recent statewide trends in children's well-being, Part 2 of the report discusses how policy changes can mitigate the effects of poverty on children and break the cycle of poverty. Part 3 presents findings for key indicators in each of the 5 areas and discusses special concerns, including population diversity, needs of low-income working families, the cycle of poverty and education, youth obesity, and juvenile justice. The findings reveal that child poverty is more common for children outside the metropolitan Puget Sound region, under the age of five, and in single parent families. Child mortality from medical conditions and teen suicide mortality decreased from 1999 to 2000. During the 1990s, the juvenile arrest rate dropped by 20 percent. The report concludes with information on data sources. (KB)