I have a real problem with students grading someone else's work especially quizzes or exams. I strongly feel that we need to keep the confidentiality of the students' grades. Having another student grade a peer's paper especially if the peer did poorly can have a huge effect on the peer's self-esteem. The peer may believe that the student grading their paper thinks they are incompetent or even dumb. Even though grading the papers myself may take time, I do it to maintain the confidence of my students. I have found several ways to make it quicker. One is to use an answer sheet where I only see the student's answers and not the questions. I then use the key to check it quickly. I have also used online tests, so the test software grades it for me. The students would receive their grades as soon as they say submit much like the quizzes in this training course.