https://writecheck.turnitin.com/static/home.html
"WriteCheck compares every paper to a massive database of content from over 80,000 major newspapers, magazines, scholarly journals and books as well as a database of over 12 billion current and archived pages of web content, and 100 million previously-submitted student papers (as of end of October 2009).Use any word processor. Papers can be submitted as MS Word, WordPerfect, PostScript, PDF, HTML and RTF files, or cut-and-pasted into the submission window as plain text.WriteCheck (powered by Turnitin) was developed by the creators of Turnitin, the world's #1 most popular, most effective and most trusted solution for originality checking and plagiarism prevention. WriteCheck (powered by Turnitin) was developed at the urging of high school and college writing teachers and instructors from every discipline. They saw a large, unmet need for students to learn to check their own work for proper citations. We see WriteCheck as the essential "third check" for any paper - first: spelling check; second: grammar check; and, third: originality check. "
"Here at ReadWriteThink, our mission is to provide educators, parents, and afterschool professionals with access to the highest quality practices in reading and language arts instruction by offering the very best in free materials."
