Outdoor education is often mistakenly referred to as synonymous with adventure education, adventure programming, and outdoor learning, outdoor school, adventure therapy, adventure recreation, adventure tourism, expeditionary learning, challenge education, experiential education, environmental education, and wilderness education. Consensus about the meaning of these terms are also difficult to achieve. However, outdoor education often uses or draws upon these related elements and/or informs these areas. The hallmark of outdoor education is its focus on the "outdoor" side of this education; whereas adventure education would focus on the adventure side and environmental education would focus on environmental. For more information, see Outdoor education definitions (Wikibooks).

http://en.wikipedia.org/wiki/Outdoor_education