Piaget is a constructivist, proposing that children create their knowledge of world. However, he also believes that in the creation and unfolding of their knowledge, children are constrained by absolute conceptual structures, especially those of mathematics and logic. Thus Piaget accepts an absolutist view of knowledge, especially mathematics. He also provides psychological support for the progressive experience. The notion of children’s mind as unfolding during development and the importance of experience. The notion of children’s development reaching stages of ‘readiness’ gained theoretical support, from Piaget’s work.