The document discusses Lev Vygotsky's theory of learning. Vygotsky believed that learning occurs through social interaction and language. He identified two main types of learning - interpsychological learning which occurs through interactions with others, and intrapsychological learning which occurs internally after exposure to new ideas. Vygotsky also introduced the concept of the Zone of Proximal Development, defined as the area just above a child's current skill level where learning can be supported by more capable others through scaffolding.