This book contains principles for the organization and development of curriculums in language arts. Following the establishment of the principle that language power is integral to a child's growth and must be developed in the social situation in which it is used, illustrative programs and problems faced by curriculum planners are discussed by level (preschool, elementary, secondary, and college) and by skill or subject matter (grammar, linguistics, speech, writing, listening, literature, reading, semantics, mass communications.) The importance of English in the total school program, the need to meet the challenge presented by individual differences among students, and methods of evaluating instruction are also considered. (JS)