...that every degree will be a z-degree
"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."
This is from Open licenses by Alek Tarkowski, distributed under a CC BY 4.0 license