Works in the "public domain" are works that are not copyrighted or licensed at all and legally free for anyone to use. Whether a work is public domain depends on a number of factors: if it is published or unpublished, when it was published, and if the author is living or deceased (and how long they have been deceased). In brief, a work may be public domain if:
See this Copyright Term and Public Domain in the United States chart from Cornell University for a helpful guide on how to determine if a work is public domain.
Public Domain Educational Resources
You can find public domain works in collections across the Internet. Here is a selection of public domain collections that may provide educational resources.
Many libraries provide digital collections of public domain materials online, free for anyone to access. Here is a selection of digital collections that include materials that may be used for educational purposes.
What is the difference between OER and Open Access?
Both OER and Open Access (OA) books and journals are freely accessible to anyone on the Internet. While the terms "OER" and "OA" may seem interchangeable, there are a few key differences between them:
While OA articles and books are not OER, you may choose to use them as free educational materials for your course. Below is a selected list of OA repositories and resources.
Open Access Materials
You can find more databases for open access resources with the "Free/Open Access" filter (use the "type" drop-down menu at the top) on the Salmon Library's A-Z Databases list.