Filter to Separate Assignments

While I don't often have my own classroom, one of the ways in which GMail can be used effectively in a paperless environment is by setting up Filters by Classroom.  For example, if I know that I have fifteen people in my fifth hour class, I can easily set up those fifteen student emails to filter to the same label under "Fifth Hour Class."  By asking students to email you their assignments, when those assignments arrive, you can automatically have them arranged and organized by class period!  It's a great tool for organizing grading!