To create the development of knowledge must start with an idea which seems central to me thus idea of an operation. Knowledge is not a copy of reality. To know an object, to a an event, is not simply to look at it and make a mental copy or [some of it. To know an object is to act on it. To know is to modify, to its the internet and their understand how process der this type and as it consequence des hommes the way the object in public An analysis is thus the essence of knowledge; it is an interiorized action it is the object of knowledge.

inflicted piaget

Piaget, J. (1964). Part I Cognitive development in children: Piaget. Development and learning. Journal of Research in Science Teaching, 2(3), 176–186. https://doi.org/10.1002/tea.3660020306