John Dewey (October 20, 1859 – June 1, 1952) was an American philosopher, psychologist and educational reformer whose ideas have been influential in education and social reform. He refered to a student as ‘the reflective practitioner’.
Jean Piaget (9 August 1896 – 16 September 1980) was a French-speaking Swiss developmental psychologist and philosopher who placed great importance on the education of children.
Lev Vygotsky (November 17 1896 – June 11, 1934) was a Russian psychologist, who broadened the view of constructivism as learning is a social process. He is also known for his ideas about the “Zone of proximal development”.
Jerome Bruner (born October 1, 1915) is an American psychologist who has made significant contributions to human cognitive psychology and cognitive learning theory in educational psychology, as well as to history and to the general philosophy of education.