The document discusses several theories of child development and their implications for language education. It describes Piaget's view that children should engage in self-directed learning tasks appropriate to their developmental level. Vygotsky's theory emphasizes social learning and the role of language as a thinking tool. Bruner's concept of scaffolding notes cognitive development occurs through language and simplified tasks broken into smaller steps with adult guidance. Routines and a spiral curriculum that exposes topics in multiple ways and links old and new information are also discussed.