The document discusses various perspectives on constructivism in education. It covers cognitive constructivism, which emphasizes active learning and authentic real-world problems. It also discusses Jerome Bruner's theories of scaffolding and a spiral curriculum. Piaget's theories of schemas, assimilation, accommodation and equilibration are explained. Vygotsky's ideas of cultural mediation, the zone of proximal development and scaffolding are summarized. John Dewey's influence on education and social reform is briefly mentioned.