Language learning is not a simple linear process, but involves the ongoing development of skills for a range of purposes. Gibbons sees this development as largely the result of the social contexts and interactions in which learning occurs. By focusing on the ways in which teachers can "scaffold" language and learning in the content areas, she takes a holistic approach - one that appreciates the struggle of students learning a new language, while simultaneously developing subject knowledge in it, and the challenge for teachers to address these needs. Given today's culturally and linguistically diverse classrooms, ESL students can no longer be thought of as a group apart from the mainstream - they are the mainstream. This book describes the ways to ensure that ESL learners become full members of the school community with the language and content skills they need for success.