George Hillocks, Jr. starts with the basic assumption that writing is at the heart of education, and provides a metatheory to respond to this question: "What is involved in the effective teaching of writing at the secondary and college freshmen levels?" The author outlines a variety of theories, explains the bridges between them, and provides a coherent theoretical basis for thinking about the teaching of writing. This concern with theory and research is offset by his attention to the practical matters of the classroom; teachers are shown how to plan activities and sequences of activities that are appropriate for students who are within Vygotsky's "zone of proximal development".