The main stipulation for using OER is that you give credit to the original authors. CC attribution states "You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in a any reasonable manner, but not in any way that suggests the licensor endorses you or your use."
This attribution should be built into the syllabus, module details, or other location where the content is inserted or cited as needed. If you have made a copy of the content and altered or enhanced it, you should also list any modifications you may have made in that document.
The Creative Commons Wiki offers great advice for how build a sound attribution:
Whenever you are reusing CC licensed works, we recommend that the attribution include the Title, Author, Source, and License. This is true whether you’re sharing the work as-is or if you have made an adaptation. To remember these attribution elements, it’s helpful to think of the acronym: TASL.
