Jean Piaget was a Swiss psychologist and philosopher, well known for his pedagogical studies. His theory of cognitive development and epistemological view are together called "Genetic Epistemology."
He is considered the pioneer of the “constructivist theory of knowing.”
“Construction is superior to instruction”. Children are developing and constantly revising their own knowledge. The information is assimilated into what we already know or need a new place for it (need to be accommodated) thus returning to a sense of balance (equilibrium).
Piaget’s view of cognition theory is two fold:
1) Learning is a process of discovery, of finding out what one needs to know to solve a problem.
2) Knowledge results from active thought, from making mental connections among objects, from constructing a meaningful reality of understanding.
Knowledge is “an interpretation of reality that the learner actively and internally constructs by interacting with it”. (Labinowitz, 1980)