This document discusses extension education, including its evolution, philosophy, principles, objectives, and definitions. It describes extension education as teaching activities conducted outside of universities to disseminate knowledge. The key principles are that extension education begins with rural people's current situation and involves them in program development. Extension education aims to teach people skills for self-reliance rather than dependence. It is linked to community development by focusing on community-led improvement efforts. Effective communication is also essential, involving clear transmission of messages through various channels to achieve understanding.