If you are interested in this topic, look for the interesting edited book called Student Plagiarism in an Online World: http://www.igi-global.com/reference/details.asp?ID=7031&v=tableOfContentsI wrote a chapter called, "Expect Originality! Using Taxonomies to Structure Assignments that Support Original Work." In it I discuss the complexities of plagiarism in the context of a digital culture of sharing and suggest that it is rarely black and white. I propose a continuum with intentional academic dishonesty on one end and original work on the other, with gradations in between. Based on my own research and teaching experience, I believe the instructional design and style of teaching can either make it easy-- or very difficult-- to cheat.