Language is transmitted culturally; that is, it is learned. To a lesser extent it is taught, when parents, for example, deliberately encourage their children to talk and to respond to talk, correct their mistakes, and enlarge their vocabulary. But it must be emphasized that children very largely acquire their first language by “grammar construction” from exposure to a random collection of utterances that they encounter. What is classed as language teaching in school either relates to second-language acquisition or, insofar as it concerns the pupils’ first language, is in the main directed at reading and writing, the study of literature, formal grammar, and alleged standards of correctness, which may not be those of all the pupils’ regional or social dialects. All of what goes under the title of language teaching at school presupposes and relies on the prior knowledge of a first language in its basic vocabulary and essential structure, acquired before school age. If language is transmitted as part of culture, it is no less true that culture as a whole is transmitted very largely through language, insofar as it is explicitly taught.