Virginia Tech Librarians visited classrooms to conduct end-of-semester interviews with classes in which one or the other had previously conducted instruction sessions. These retrospective interviews, ranging in length from 15 minutes to nearly an hour, had several purposes: to assess library instruction teaching and to reinforce and clarify previous instruction in the students' context, with the hope that students will retain what they have been taught. "Retros" can inform teaching practice and course content for both librarians and academic faculty.