Students taking free online courses offered by the startup company Coursera have reported dozens of incidents of plagiarism, even though the courses bear no academic credit. This week a professor leading one of the so-called Massive Open Online Courses posted a plea to his 39,000 students to stop plagiarizing, and Coursera's leaders say they will review the issue and consider adding plagiarism-detection software in the future. In recent weeks, students in at least three Coursera humanities courses have complained of plagiarized assignments by other students. The courses use peer grading, so each student is asked to grade and offer comments on the work of fellow students.
