Turnitin is one of the tools that your professors may have you use to check your papers for copying and to help you with your writing. It's important to recognize that Turnitin does NOT check for plagiarism--it compares what you've written to other documents in its database to see if any of the text is the same. There are times when it's OK to have words from other documents in your papers--for example, when you're quoting. To find out more about how to use Turnitin, go to their QuickStart Guide for students, or watch the video below.
Below are some resources to help you avoid plagiarism in your writing:
Plagiarism (UNC-Chapel Hill)
How to avoid plagiarism (University of Wisconsin)
Should I paraphrase or quote? (University of Wisconsin)
How to paraphrase a source (University of Wisconsin)
Successful vs. unsuccessful paraphrases (University of Wisconsin)
UNC at Chapel Hill has a wide variety of short and concise guides to a range of topics. http://writingcenter.unc.edu/handouts/
Here is a selection that are specifically useful to the types of writing you will be doing in the Program.