Because keeping up with papers from each student in each subject can be overwhelming, I've added onto the idea of assigning student numbers in the classroom. When students head their papers, they are required to include their personal numbers based on alphabetical order. At the end of the day, papers are collected and put in "ordinal position" by students. I have a quick record of which papers are missing. When papers are graded, student helpers file the papers in individual file folders for the students to check. The folders are kept in a basket in the back of the room and I don't waste valuable time passing papers to students.