Open educational resources, student efficacy, and user perceptions: a synthesis of research published between 2015 and 20182020 study synthesized results from studies involving 121,168 students or faculty that examine either (1) OER and student efficacy in higher education settings or (2) the perceptions of college students and/or instructors who have used OER. Results across these studies suggest students achieve the same or better learning outcomes when using OER while saving significant amounts of money.