Find openly licensed content

If you are modifying an open textbook, you may want to find additional resources to use in your textbook. Ideally, content licensed with a CC-BY license provides the most flexibility for reuse, so we recommend trying to find content for reuse with that specific CC-BY licenses. If you are planning to make modifications to the resource, you will want to avoid any CC material that has the -ND (No Derivative) attribution as this content can be reused, but not modified.
If you are looking for Creative Commons licensed content, you can try the following services and search engines.

There are many more places to find open resources. A comprehensive list of openly licensed repositories is located in the OER Handbook for Educators, including some subject area specifics.

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