When I copy my tests, I number them according to the student number given in my grade book by the publisher. This way, I know which student has which test at the end of the period. I use less copy paper and ink as I only copy about twenty sheets rather than sixty or more. I can easily post the grades outside of the classroom by their test number code. By doing this, the students don't know everyone else's grade. Only the student who has that test number knows how well they did.