(Image courtesy of TurnItIn / http://turnitin.com/en_us/home)
Click Here to vist the TurnItIn website
Your professor might ask you to to use the website TurnItIn when you are finished with your paper.
You can upload your paper, and the website will check it for plagiarism by comparing your words with previously published materials from books, articles, and websites.
Your professor can also grade your paper on this website, or have you do a peer review of another student's paper.