This study investigated how instructors consider resource cost and availability to students when selecting reading and viewing assignments. It employs a critical incident technique method, asking instructors to consider one course syllabus when considering their assignment practices. Findings address differences across formats including books, chapters, articles, and media. Most instructors never consulted library personnel regarding their reading and viewing assignments. Social and behavioral science instructor responses demonstrated interest in course material cost to students. Humanities and fine art instructor responses also demonstrated interest in cost and familiarity with library services. Responses from natural science, nursing, and engineering demonstrated less familiarity with library services and copyright laws.