Author: Weiten/dunn/hammer Edition: 10th, Tenth, 10e Format: Printed Access Card ISBN 13: 9781133445265 (978-1-133-44526-5) ISBN: 1133445268 (1-133-44526-8) A Student Access Key is a single-use unique PIN a student must enter in order to view and utilize publisher content added to a course using a Protected Access Course Cartridge. A student will only be prompted to enter a Student Access Key once. After the validation has been approved, a student will be able to access the content for the remainder of the course. Student Access Keys are sold as part of a new textbook package or as a standalone item in bookstores. (This is a standalone item I bought and never used.) Standalone item - no textbook! Student Access Keys are single use only.