One reason that faculty choose to use open educational resources is the benefit to students in saving on textbook costs. Here are a few resources on the impact of saving money for students: 

Faculty report that they benefit from being able to customize the course materials due to the affordance of the open license. Here are a few examples:

Last, emerging research shows that student grades are likely to improve with the use of open educational resources (probably because everyone has Day 1 access) and that the positive impact may be greater for traditionally underserved students, such as Pell grant, non-White, and part-time students: