Reviews empirical studies of outdoor education's impact on cognitive development. Research findings are presented on the subject areas of environmental education, general science, and language development. A cautionary synthesis of research related to learning in the out-of-doors is also offered. (ML)

Reviews the current literature concerning prior knowledge in an attempt to clarify problems with the terminology. Identifies the three main problems: lack of definition or vagueness, nominal versus real definitions, and different names/same constructs or same name/different constructs. Includes a conceptual map of prior knowledge terminology. (MJP)