Jean Piaget made a systematic study of cognitive development among children of different age groups and he categorized it into different developmental stages. Jean Piaget said that children actively construct their understanding of the world. He believed that a childs mind passes through a series of stages of thought from infancy to adolescence.According to Jean Piaget:The information does not simply enter children's minds from the environment, it should ensure the learning of children.Children develop an understanding of interaction with the surrounding environment.Piaget identifies four factors namely biological maturation, active exploration, social experiences, and equilibration that interact to influence thinking.So we conclude that according to Jean Piaget, active exploration by the learner is necessary for learning.Important Points Jean Piaget proposed that humans progress through four developmental stages: the sensorimotor, preoperational, concrete operational, and formal operational periods.StagesChanges in childSensorimotor stageSenses are teachersReflex actions.Intimate behavior. Pre-operational stageLanguage developmentIrreversibilityEgocentrismAnimismConcrete operational stageLogic beginsReversibilityClassificationConservationFormal operational stageGeneral to specific.Divergent/Convergent.Creative thinking.Additional Information ConceptsProposed byReinforcement and punishmentB. F. SkinnerLanguage development which facilitates social interactionLev Vygotsky