Adult learning is a complex phenomenon. Although there are many commonalities between how adults [Page 10]and children learn, development and change that take place across the life span play a definite role in understanding why adults learn, as well as how they learn. In educational psychology, an understanding of adult learning and the adult learner is crucial to a commitment to lifelong learning. Major challenges facing those who work with and study adult learners include questions about the extent to which knowledge is discovered or constructed and where one locates oneself in terms of focusing on individual and social aspects of learning.