This book details a funded study of the mental models of six United States and four Australian teacher-librarians. It analyzes and compares their espoused (before), in-action (during), and reflective (after) models while they were teaching two students--in one-on-one sessions--how to use a computer information database resource. The authors discover the what, how, and why of teacher-librarians' thinking, beliefs, and images (i.e. their mental models)...