The OWL at Purdue does an excellent job of outlining what plagiarism is with resources to illustrate what to document when using someone else's work. The OWL is also an excellent source for other writing concerns and exercises.
Citation Machine is an interactive web tool designed to assist high school, college, and university students, their teachers, and independent researchers in their effort to respect other people's intellectual properties.
Copyright and Fair Use in the Classroom, on the Internet, and the World Wide Web
The University of Maryland University College provides a comprehensive look at copyright and plagiarism, including definition of terms and specifics on what can and cannot be copied without permission, and guidelines. They also provided sample letters to illustrate how to ask for permission to copy and/or use a document.
Excellent web site on copyright laws and includes examples of audio and visual copyright violations.
Duke Law Center for the Study of Public Domain
Many free resources & much discussion by the people who think about public domain and know best. "Its mission is to promote research and scholarship on the contributions of the public domain to speech, culture, science and innovation, to promote debate about the balance needed in our intellectual property system and to translate academic research into public policy solutions."
"Follow its heroine Akiko as she films her documentary, and navigates the twists and turns of intellectual property. Why do we have copyrights? What’s “fair use”? Bound By Law reaches beyond documentary film to provide a commentary on the most pressing issues facing law, art, property and an increasingly digital world of remixed culture."
Turnitin Research Resources
A simple guide for students to learn how to avoid plagiarism and use correct citations.
U.S. Copyright Office
"Here you will find all our key publications, including informational circulars; application forms for copyright registration; links to the copyright law and to the homepages of other copyright-related organizations; news of what the Office is doing, including business-process reengineering plans, Congressional testimony and press releases; our latest regulations; a link to our online copyright records cataloged since 1978; and much more."
A Visit to Copyright Bay
This is a fun way to learn about copyright and fair use for students and adults. It is game-like in presentation with "Fair Use Harbor", "Infringement Reef", and "Murky Waters". The Bibliography/Webliography is a great place to find additional resources. Created by graduate students in the Educational Technology Leadership program at George Washington University.
What is Copyright Protection?
This non-profit site allows anyone to reproduce all or parts of this site for educational and non-profit reasons. It is a good site for the basics: what is copyright, when does it begin, what is required, when does it expire, as well as fonts, royalty-free images, sound-clips, and public domain.
Funded in part by grants from the U.S. Department of Education, Office of Federal TRIO Programs.
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