I label a file folder for each student and place them in a deep box. I keep a shallow box next to it. As soon as I have graded papers and am finished with them, they go into the shallow box to be filed into the folders. This "center" can be manned by up to 2 students at any time (provided the students have all work completed!). The students have the chance to be responsible, learn filing skills, and help their teacher (!). It saves me time, as well. On Friday, I send all papers home. Even if we are short on time, "Viola!", every paper is filed and ready for home!