The fifth edition of The ID CaseBook provides instructional design students with 26 realistic, open-ended case studies that encourage adept problem-solving across a variety of client types and through all stages of the process. After an introduction to the technique of case-based reasoning, the book offers three sections dedicated to K-12, post-secondary, and corporate clients, respectively, each composed of varied, detailed cases created by instructional design experts. The cases and their accompanying discussion questions encourage students to analyze the available information, develop action plans, and consider alternative possibilities in resolving problems. The esteemed editor team of Peggy A. Ertmer, James A. Quinn, and Krista D. Glazewski continue their considerable contribution to the teaching of instructional design with this thoroughly revised and updated volume.