Exploring the ways in which today's Internet-savvy young people view and use information to complete school assignments and make sense of everyday life, this new edition provides a review of the literature since 2010. The development of information literacy skills instruction can be traced from its basis in traditional reference services to its current growth as an instructional imperative for school librarians. Reviewing the scholarly research that supports best practices in the 21st-century school library, this book contains insights into improving instruction across content areas—drawn from the scholarly literatures of library and information studies, education, communication, psychology, and sociology—that will be useful to school, academic, and public librarians and LIS students. In this updated fourth edition, special attention is given to recent studies of information seeking in changing instructional environments made possible by the Internet and new technologies. This new edition also includes new chapters on everyday information seeking and motivation and a much-expanded chapter on Web 2.0. The new AASL standards are included and explored in the discussion. This book will appeal to LIS professors and students in school librarianship programs as well as to practicing school librarians.