Suppose there are available OER related to your curriculum, but they are dated, too broad, or contain information that is beyond the scope of your course. In that case, you may want to consider modifying the materials.
Alternately, if there are OER available on the topic your course covers, but no single resource is broad enough to cover the needs of your course, you may want to consider compiling a selection of various OER, free online materials, and websites that make up the resources for use in a class. OER adaption possibilities are nearly limitless due to the digital nature of OER!

After confirming that the Creative Commons license attached to the materials allows for adaptation, you may choose to edit the materials to tailor them to your course. Alterations can be as simple as changing graphics, reorganizing chapters, deleting content that isn't relevant, or as intensive as revising the materials to incorporate additional OER sources or content you create yourself.
Example: