Here is a list of OERs divided by discipline (created by San Bernadino Valley College)
There have been multiple studies on faculty implementations, misunderstandings, acceptance of, and evaluation of OER. The Open Education Group's Review Project has curated a number of empirical studies published in scholarly journals on the topic. Their general conclusion is:
Once adopted, OER provide the permissions necessary for faculty to engage in a wide range of pedagogical innovations. In each of the studies reported above, OER were used in manner very similar to the traditional textbooks they replaced. We look forward to reviewing empirical articles describing the learning impacts of open pedagogies.
(For more information, please consult the summary of their research published in Education Technology Research and Development in August 2019.)
No Cost "Textbooks" from the Library
In some courses, a satisfactory OER textbook may not be available. And while most major textbook publishers (Cengage, Pearson, McMillan, etc.) sell texts in electronic format, typically each student wanting to use the eBook must purchase a separate license. In contrast, library eBooks can be used by any student, much like books placed on reserve, and some library eBooks are available for unlimited use, allowing multiple students to use them simultaneously.
It may be also possible to find alternative "texts" that can be used by students without cost to them by using open-access resources from reputable websites, online databases, etc. Depending on the discipline and course, you may find it useful to enlist the help of the library in identifying OER materials for your course and making them available to your students. If there are specific titles you know you will be using, consulting the library well in advance will allow us to see if we own the title you need as well as helping us know what resources we need to consider purchasing.
Cool4Ed http://cool4ed.org/findetextbooks
Faculty from the University of California, the California State University, and the California Community Colleges have worked together to provide easy access to quality FREE and OPEN eTextbooks that everyone and anyone can use for teaching and learning.
Libretexts https://libretexts.org/index.html Provides access to OER resources and a platform for faculty to curate and compile resources. LibreTexts is based at UC Davis.
MERLOT https://www.merlot.org/merlot/
MERLOT provides access to curated online learning and support materials and content creation tools, led by an international community of educators, learners, and researchers. MERLOT is a “referratory”, providing links to resources housed elsewhere.
Milne Open Textbooks https://milneopentextbooks.org/browse-by-subject/
Open access textbook publishing initiative established by State University of New York libraries and supported by SUNY Innovative Instruction Technology Grants.
Open Textbook Library https://open.umn.edu/opentextbooks/subjects
OER developed by College of Education and Human Development at the University of Minnesota.
Open Textbook Store http://www.opentextbookstore.com/catalog.php
Curated list of open textbooks from a variety of sources, primarily in Mathematics.
Saylor Academy Open Textbooks https://www.saylor.org/books/#comm
Saylor Academy does not own the copyright to any books on their page. Each books' open license is an agreement betweenthe end user and the copyright holder.
Scholarworks https://scholarworks.gvsu.edu/books/ A small but growing collection of open educational resources authored by faculty at Grand Valley State University in Michgan and hosted by the university's open-access repository.
Virtual Biology Lab http://virtualbiologylab.org/
Virtual Biology Lab is a free, online educational resource provided for educational purpose
ZTC Textbooks https://www.canyons.edu/academics/onlineeducation/ztc/textbooks.php OER developed by College of the Canyons
These sites may contain copyrighted material, public domain material, and items allowed to be shared through creative commons. Be sure to filter search results for items allowed to be shared. Also, please keep in mind that all materials used in instruction must be ADA-compliant. This means that images need to have alternate text provided and videos must be close-captioned (and automatically generated subtitles from some sources, such as YouTube, may not be adequate).
www.ted.com
Attribution: You must attribute TED as the owner of the TED Talk and add a visible link back to TED.com.
Running talks in their entirety: You may not edit TED Talks, or alter them in any way, including by sharing only shortened versions or clips.
https://commons.wikimedia.org/wiki/Main_Page
www.Nypl.org/research/collections/digital-collections/public-domain
https://www.loc.gov/free-to-use/
https://www.metmuseum.org/art/collection
https://www.guggenheim.org/publications