First, know that material is either protected by copyright or it's not.
If the work isn't protected by copyright, you can use as much as you like, however you like. This includes:
- Works that are not copyrightable
- Works where the copyright has expired
- Works that have been put into the public domain by their creators
If the work is protected by copyright, you may still be able to use it in your class. Your options include:
- Getting permission
- Seeking a license
- Taking advantage of educational exceptions
- Claiming fair use
For more information about these options, review the content below: