This document summarizes Jerome Bruner's theory of cognitive development. It discusses his three modes of representation - enactive, iconic, and symbolic. Bruner believed that learning involves relating new experiences to prior knowledge and that interest is a better motivator than competition. He also emphasized the importance of language and social learning, proposing that learners construct their own understanding with guidance from adults. The document compares Bruner's views to those of Vygotsky and Piaget on child development and education.