U.S.
Copyright Office
Copyright and Fair Use from Stanford University (especially "Fair Use" and" Website Permissions")
Guidelines for Educational Copying
Music
Copyright Violations (File Sharing at GMU) - Required Reading
What
Chemists Need to Know about Copyright
Copyright vs. Plagiarism -Required Reading
Creative Commons - "a single goal unites Creative Commons’ current and future projects: to build a layer of reasonable, flexible copyright in the face of increasingly restrictive default rules".