This document provides an introduction to open educational resources (OER) for faculty. It begins with a welcome message and sets the stage by discussing rising textbook costs, which have increased over 80% in the past 12 years. This creates barriers for many students, who often cannot afford textbooks. The document then introduces OER as a solution, defining them as teaching and learning materials that are freely available online for anyone to use and adapt. It discusses the benefits of OER for both students and faculty, including lower costs and greater customization. Various OER projects and initiatives are also highlighted. Overall, the document makes a case for adopting OER to lower costs for students and remove barriers to their education.