Piaget’s theory of learning is based on the proposition that the child [or person] builds cognitive structures, that is, mental maps, concept networks, or schemas that are used to understand and respond to new learning experiences.  His several stages of development explain how
these structures and their use in
thinking change qualitatively with maturation.  If the child’s learning experience fits existing schemas or cognitive structures of knowledge, it is assimilated; if the learning experience is relatively unfamiliar, different, or novel in some way, the child [person] loses equilibrium and must rebuild one or more schemas or networks of cognitive structures to accommodate the new information.
Created by Dr. Gordon Vessels 2005