, November 00, 0000: "In the largest study of its kind, a group of researchers has examined the use of open educational resources (OER) and found that students who used OER in their undergraduate courses performed as well or better than those assigned commercial textbooks." + ** See Dan Pollock and Ann Michael, [https://deltathink.com/news-views-evaluating-quality-in-open-access-journals/ Evaluating Quality in Open Access Journals], 