Vygotsky's Theory, developed by Lev Vygotsky, emphasizes the importance of social interaction in cognitive development. He proposed that learning occurs through collaboration with more knowledgeable others, such as teachers or peers, who provide guidance and support. This process helps individuals internalize new skills and concepts. A key concept in Vygotsky's Theory is the Zone of Proximal Development (ZPD), which refers to the difference between what a learner can do independently and what they can achieve with assistance. This framework highlights the role of cultural tools and language in shaping thought processes and learning experiences.