This search tool allows you to find Creative Commons licensed material in Google and repositories including YouTube, Flickr, Wikimedia Commons, and others. Narrow your search by license type or by repository.
The Mason OER Metafinder allows you to search a variety of sources simultaneously, including the Library of Congress, Project Gutenberg, Open Textbook Library, OER Commons, OpenStax, Internet Archive, Project Gutenberg, MERLOT, and Hathitrust. These sources have many OER as well as public domain materials.
An open textbook is a textbook licensed under an open copyright license and made available online to be freely used by students, teachers, and members of the public. They are available for free as online versions and in a variety of file formats (e.g., for eReaders, editable files like XML and HTML), and as low-cost printed versions, should students or faculty opt for these. Open textbooks are a way to significantly reduce student textbook costs while giving instructors the flexibility to reformat and customize their course material. They are an affordable, flexible alternative to traditionally-published textbooks.