Open educational resources (OER) are any resources available at little or no cost that can be used for teaching, learning, or research. The term can include textbooks, course readings, and other learning content; simulations, games, and other applications; syllabi, quizzes, and assessment tools; and virtually any other educational material. Open resources are issued under a license that spells out how they can be used: Some may only be used in their original form; in other cases, resources can be modified, remixed, and redistributed. OER expand the access to educational resources to more learners, more of the time, and they have the potential to spur pedagogical innovation, introducing new alternatives for effective teaching