Based on an in-depth study of children's language development theory, this book puts forward the original proposition that semantic perception is the human sixth sense. Presenting a detailed, complete, and scientific argumentation, it asserts that the innateness of semantic perception has a physiological basis and that language acquisition is based on semantic perception, and proposes the idea of a critical period of nurture and language growth. To this end, the book not only contrasts children's language acquisition processes and the process of adult speech generation and comprehension, but also discusses the ability to read and write, describing this important stage of children's language development and analyzing semantic perception. Focusing on education and psychology, it also discusses the use of semantic perception theory to instruct teaching and learning. This book is a valuable resource for teachers, researchers, practitioners and graduate students in the fields of educational technology, child development and language learning, as well as anyone interested in children's language development.