During the 1920s, a biologist named Jean Piaget proposed a theory of cognitive development of children. He caused a new revolution in thinking about how thinking develops. In 1984, Piaget observed that children understand concepts and reason differently at different stages. Piaget stated children's cognitive strategies which are used to solve problems, reflect an interaction BETWEEN THE CHILD'S CURRENT DEVELOPMENTAL STAGE AND experience in the world.         Research on cognitive development has provided science educators with constructive …showed first 75 words of 1656 total…

…showed last 75 words of 1656 total…B., & Piaget, J. (1958). The growth of logical thinking from childhood to adolescence. New York: Basic Books. Inhelder, B., & Piaget, J. (1971). Mental imagery in the child. London: Routledge and Kegan Paul. Inhelder, B., & Sinclair, H. (1974). Learning and development of cognition. Cambridge, Mass.: Harvard University Press. Philips, D. (1976, February). Piagetian perspectives on science teaching. The science teacher. vol. 43, No. 2. Piaget, J. (1973). To understand is to invent: the future of education. New York: Grossman Publication.