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( Bruner, Isaacs, Piaget, Gesell ) built on the beliefs of ( Vygotsky, Isaacs, Piaget ) but developed the idea that children process ( different, same, similar ) ways of thinking rather than passing through stages. He considered the role of the adult in helping children learn and coined the term '( Scaffolding, Zone of Proximal Development (ZPD), Active Learners, Child centered learning )'.