Turnitin is an effective online technology for improving student writing. It is used by educators worldwide (over 60 million papers were processed in 2011) to check students' papers for originality, to enable web-based peer review and for digital grading of student work.
Its most used and famous feature is OriginalityCheck, the plagiarism prevention tool. It ensures original work by checking submitted papers against billions of web pages, millions of student papers and leading library databases and publications. Originality Reports provide a summary of matching or highly similar text found in a submitted paper.
Another important tool, GradeMark, allows an instructor to edit and grade student papers online. The instructor can add comments within the body of the paper, point out grammar and punctuation mistakes, evaluate the paper against qualitative or quantitative rubrics, etc.
A third tool is PeerMark: Instructors can create and manage PeerMark assignments that allow students to read, review, and evaluate one or many papers submitted by their classmates.
Turnitin integrates with more than 50 Course Management Systems, including Blackboard, Moodle, Instructure Canvas, Desire2Learn, Pearson Learning Studio, and Sakai.

System requirements: 
GradeMark is currently designed for full compatibility with the following browsers: Internet Explorer 7.x and 8.x (Windows) Mozilla Firefox 3.x (Windows, Mac OS X) Google Chrome 4+(Windows, Mac OS X) Safari (Mac OS X) No other system requirement information is given.

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