There are a number of “plagiarism detection tools,” such as Turnitin.com, that are available for use in the classroom. If you decide to use them, it is important to realize that they do not actually detect plagiarism, but rather textual overlap, leaving it up to you to decide whether this overlap constitutes plagiarism. (See Brown et al. below for a good article regarding the shortcomings of Turnitin.com.)
iParadigms, the company behind Turnitin.com, has also launched Plagiarism.org, a site designed to educate students on plagiarism. Plagiarism.org contains WriteCheck, an online tool powered by Turnitin that allows students to submit their work and check it for textual overlap prior to turning it in. There is a fee for this service. See http://www.writecheck.com/static/home.html for more details.
EMU’s official policy regarding student conduct and academic dishonestly can be found at http://www.emich.edu/policies/policy.php?id=124&term=student%20conduct. Additionally, the Office of Student Conduct and Community Standards maintains a page designed to help professors promote academic honesty at http://www.emich.edu/studentconduct/facultylinks/academic_integrity.php.
Should you find a student guilty of plagiarism, you do have options regarding your next steps.
Gillis, K., Lang, S., Norris, M., and Palmer, L. (2009). Electronic plagiarism checkers: Barriers to developing an academic voice. The WAC Journal, 20, 51-62. Retrieved November, 2017 from https://wac.colostate.edu/journal/vol20/vol20.pdf#page=53