Another strand in the progressive tradition is that of psychological theories of development, from Herbart and Freud to Piaget and Bruner. Piaget’s theory of intellectual development focuses on two central aspects of the progressive view of childhood development focuses on two central aspects of the progressive view of childhood. First, on the centrality of children’s experience, especially physical interaction with the world. Second, on the unfolding logic of children’ thought, which differs from that of the adult. These are intertwined, as the child represents its experiences and actions mentally, and transforms these representations by means of the developing sequence of logical operation.