Discusses conventional indices for measuring the aging of populations. Proposes a new index for measuring the aging of populations using the proportions of all available age categories. Focuses on changes in the structure of a population. (RC)

Discusses the increasing proportion of minority enrollments in urban schools and the ensuing social isolation of Black and Hispanic American students. Reviews four models of metropolitan school desegregation plans. Suggests a federal initiative that would require states to develop plans involving multiple school districts. (FMW)