You can watch this tutorial, which covers plagiarism basics and some finer points as well, and then take the quiz as a guest.
It is important to document where you get your information from. You do this by creating references, or citations. Follow formatting guidelines provided by your instructor. Styles for creating references include APA, Chicago, MLA.
WVU Libraries subscribes to some tools that can assist you in preparing your bibliography.
Citing your sources helps you to avoid plagiarism. The Oxford English Dictionary defines plagiarism as "The action or practice of taking someone else's work, idea, etc., and passing it off as one's own; literary theft." WVU's Student Code of Conduct in Section 6.2.u (page 19) specifically warns against plagiarism.