The Annie E. Casey Foundation has published the "Data Book" for each of the past 24 years, tracking the well-being of America's children nationally and by state. To take advantage of the tremendous growth in research and data on child development, the Annie E. Casey Foundation has improved how they measure child well-being and rank states. The "KIDS COUNT" index now includes 16 child-level indicators across four domains: (1) Economic Well-Being, (2) Education, (3) Health and (4) Family and Community. This multifaceted index provides a more complex picture of child well-being in each state, especially in cases where a state excels in one or two areas but lags behind in others. [For the "Kids Count Data Book, 2012: State Trends in Child Well-Being," see ED533818.]