SURVEY SHOWS STUDENTS OPTING OUT OF BUYING HIGH-COST TEXTBOOKS
"a  survey released by the U.S. PIRG Education Fund shows that 65% of student consumers have opted out of buying a college textbook due to its high price, and of those students, 94% say they suffer academically."
"OER are teaching, learning, and research resources that reside in the public domain or have been released under an intellectual property license that permits their free use and re-purposing by others. Open educational resources include full courses, course materials, modules, textbooks, streaming videos, tests, software, and any other tools, materials, or techniques used to support access to knowledge." 
The Open Education movement is built around the 5Rs of Open 
Just because an item is free, doesn't mean it is open.