This volume begins with an overview of theories supporting natural language development-Piagetian, Vygotskian, and cognitive or information processing. Following the theoretical basis for natural language processes in reading and writing, chapters explore the following: how young children acquire rapid growth in oral language without direct instruction; the universality of play in language learning; and portfolio assessment. The contributors develop specific approaches for developing literacy, as chapters focus on the development of preschool early writing, in-school techniques for...