Evidence strongly supports a positive, causal effect of physical activity on bone strength and suggests long-term benefits of childhood physical activity to the prevention of osteoporosis. The contribution of healthy bone development in youth is likely to be as important to fracture prevention as the amount of late adulthood bone loss. Families,…

Focusing on issues involved in improving the education of low-income children, this paper identifies two categories of questions: (1) programmatic questions, which concern what and how to teach; and (2) procedural questions, which concern how best to insure implementation of instructional approaches. The discussion also provides a summary of what…