The Copyright Decision Tool can assist educators with understanding how to use various resources for educational purposes with copyright protected work which may entail asking for permission. In contrast, Creative Commons licensing asserts the copyright permission and type of usage with the resource (i.e. you do not need to seek permission with Creative Commons licensing because the permission and the type of permission are stated with the resource).
Image Retrieved from Doug Peterson, licensed under Creative Commons BY-NC-ND 2017.
This powerpoint is also a helpful summary of Copyright for Educators: