This executive summary presents the broadest look yet at a growing trend in America's cities: the emergence of city-led efforts to build comprehensive afterschool and out-of-school time (OST) systems that meet the needs of children and youth in their communities. Mayors and other municipal officials who have demonstrated leadership in this area…

The need for and applicability of general systems theory in human services evaluation is discussed. The role of evaluation in human services agencies is described and the necessity of combining the programs to be evaluated and the evaluation process itself in a single unifying conceptual model is demonstrated. (Author/AL)

Reviews types of evaluation that may be applied to school-linked services; and discusses the needs for a range of evaluative strategies for program providers, policymakers, and funders. For some programs evaluation will be primarily descriptive, whereas for others a carefully designed outcome evaluation will be possible. (SLD)