A majority of U.S. higher education teaching faculty now report that they are aware of open educational resources (OER) — an increase of 19 percentage points over the past four years. Increasing numbers of faculty are adopting OER and they rate the quality as equal to commercial alternatives.
https://www.prnewswire.com/news-releases/survey-finds-faculty-rate-the-quality-of-open-educational-resources-oer-as-equal-to-commercial-textbooks-301021333.html