This document discusses theories of adult learning and principles of teaching adults. It defines key terms and outlines several theories of adult learning, including andragogy, reinforcement theory, experiential learning, information processing theory, and characteristics of adult learners. Theories focus on how adults learn through experience, problem-solving, and self-directed learning. Principles for teaching adults emphasize involving them in the planning, making learning relevant, and capitalizing on life experiences. The document also addresses what motivates adult learners and potential barriers to adult learning.