Your search for OER may result in a perfect textbook or series of modules. However, if you are not as lucky as that, you have the option, depending on the CC license, of adapting content to more closely align with your curriculum.
Adaptation, or repurposing is defined as follows:
Adaptation implies a number of changes (more or less deep) from the original OER. Some examples are:
►to significantly modify it,
►to adapt a concrete aspect (context, learning style, specific needs, etc.),
►to adjust it (length, communication style, format…),
►to integrate some sections from other OER, etc.
Considerations as you Plan your OER
►Where will you store your OER? Did you develop it on an OER site with authoring and storage tools? Where can you find tools like this?
It is likely that much of the content in your newly created OER will have been available to you via a Creative Commons, Attribution, Share-Alike license, (CC BY SA)
Thus, though you may add a Creative Commons license of your own, asserting copyright over the content, you are constrained from adding any but an additional CC BY SA license.
For information about adding a Creative Commons copyright, click here.