This document discusses literacy development and theories of literacy and cognition. It defines literacy as the ability to understand meaning through reading, writing, listening, speaking, viewing and representing. Literacy skills need to continually expand and diversify with social and economic changes. There are different types of literacies including legal, financial, medical, statistical, computer, scientific, teaching, and business literacies. Child development and literacy are influenced by environment, health, physical development, and motivation. Theories discussed include Piaget's cognitive development theory, Holdaway's literacy development theory, maturation theory, stages models of reading, family literacy theory, and behaviorism.