Following are some web sites that discuss plagiarism from the faculty point of view. 

University of Maryland University College - Discusses how to help students avoid plagiarism and how to create assignments that discourage plagiarism.

West Texas A&M University, Cornette Library - Suggests web search engines to use to detect plagiarism and other ways to find original sources

Christian Brothers University, Plough Library - Lists clues to look for and offers resources

Anti-Plagiarism Strategies for Research Papers  - Discusses strategies to combat plagiarism

The Plagiarism Resource Site - Offers free software to help detect plagiarism

Glatt Plagiarism Services, Inc. - Self Dectection Test - provides a ROUGH estimate that plagiarism has or has not occurred