I also have students grade each others work (in classes where it is appropriate). The students not only check paper projects but the electronic files as well. This makes it easier for me as I don't have to open all the electronic files and check those too. This is good for reviewing. I was having students grade each others exams, but some students complained because they were embarrassed that other people could see their low scores, so I had to abandon that. I am using McGraw-Hill textbooks and am looking into their EZTest software. I've worked with ExamView before and it's fantastic! Lastly, students can also grade their own homework - I have them type the questions and answers from the end of the chapter quizzes and print them out. Then they grade with a pen or pencil. They can't change typed answers!