Piaget’s theory of cognitive development is a comprehensive theory about the nature and development of human intelligence. To Piaget, cognitive development was a progressive reorganization of mental processes the development of theory and methods of mathematical development of children from biological maturation and environmental experience.
He believed that children construct an understanding of the world around them, experience discrepancies between what they already know and what they discover in their environment, then adjust their ideas accordingly. Child-centered classrooms and “open education” are direct applications of Piaget’s views. Piaget noted that reality is a dynamic system of continuous change. Reality is defined in reference to the two conditions that define dynamic systems. Specifically, he argued that reality involves transformations and states.