The document discusses the concepts, philosophies, and principles of extension education. It provides several definitions of extension education from different scholars that emphasize educating adults and youth outside of formal school settings, inducing voluntary behavioral changes, and helping people solve problems. The nature of extension education is described as non-formal, two-way communication between experts and communities, voluntary participation, and respecting local culture. Mildred Harton's four principles that guide extension education philosophy are outlined, which focus on empowering individuals and families. Dahama's philosophy of extension also emphasizes self-help, people's participation, persuasion over compulsion, and voluntary behavioral changes.