Problems of definition in estimation in evaluation research were studied through a survey of homeless persons in Cook County (Illinois) based on 481 interviews. Differences arising from the following four population definitions are presented: (1) traditional homeless; (2) marginally housed; (3) social isolates; and (4) total of these categories.…

Purpose: Across mainstream educational leadership literature, the term vision has had two primary definitions: (a) a leader?s image of the future and (b) change goals. Translating vision into practice has become increasingly difficult, however, as educators have been bombarded with conflicting images and goals for schools. This article is…