4050 words Three of the main concepts that Soviet psychologist Lev Vygotsky is known for is cultural and psychological tools, private speech, and the zone of proximal development (ZPD). The ZPD is the distance between what a learner can do with and without help—the gap between actual and potential development. Vygotsky’s socio-historical theory of learning … Continue reading Vygotsky’s Socio-Historical Theory of Learning and Development, Knowledge Social Class, and IQ