The article says that allowing other students to grade tests is a good time saving method. However, it is time saving, FERPA prohibits teachers from sharing the grades and other private education related documents of another student (and rightfully so). The way around this is to have students write a reference number on the test that identifies the student who took the test -- the number can be kept a secret between the student and teacher. Personally, I don't use this method at all. However, it does save on grading time, it also factors in student grading error, and takes up valuable class time that could be used for more relevant class activities. I think a better method would be to switch to a scantron or online format for quizzes and exams. You can blend essays and short answers with a scantron or online format so that you only have to grade the essay and short answer portion of a test. I have used this format often, and it works for me. It saves paper, and it allows you to put full-resolution color diagrams if your school doesn't have a color printer. I find that I have to be more vigilant about walking around the room to make sure no one is peeking at notes for online tests though. If you're using a Mac, you can make sure they put Safari in full view, and let them know that they cannot leave that full view until the test is done. This way it's pretty easy to see when someone sneaking onto the desktop to take a look at some notes. The downside of online tests is that if you make the test inaccessible after they take it, the students don't have a study resource. However, most online portals allow the teacher to keep the test active even after it is taken. Some even allow the student to take the test again (un-graded of course) for extra practice.