Koofers.com Began in ? StudyBlue.com Cramster.com Coursehero.com Began in 2007 Began in 2003 Began in ? Catch phrase "Leveling the playing field" “Study smarter, not harder.” “Problem Solved” “Give and Get” Services Instructor ratings, grade distributions, past exams, quizzes, study guides, etc. Class Notes, Flashcards with Reminders Textbook Outlines, Tutors, Study Groups, Forums, Calendars, Shout Outs, etc Textbook solutions, topic notes, sample problems, practice exams, etc Old tests, Sample Problems, Textbook answers, class notes, study groups, etc A word on cheating and integrity “From an academic perspective, it is critical that these new advances in information sharing and collaboration are implemented in a way that does not replace scholarship with short‐term memorization or "shortcuts." At Koofers Inc., we believe that it is vital for our services to remain on the right side of academic integrity.” Find more info here. “StudyBlue has always, and continues to discourage the distribution of copyrighted material without owner’s consent.” For answers to the 2 fundamental questions people are asking click here “We work diligently to prevent misuse, but ultimately, the choice to act with academic integrity is your own.” Find more info here. “Intellectual honesty and integrity is a #1 priority of Course Hero. We DO NOT support any and all use of user submitted educational materials for unethical purposes, such as plagiarism or other forms of cheating.” Find more info here. Related news stories Koofer raises 500K Popularity growing, concerning professors Article concerning the ethics Wall street journal addresses online study sites Colorado Daily responds to Course Hero For or against it? Course Hero: Why worry? Where is it going? What should students do? What should professors do?