Always leave the last 5 - 10 minutes of the day free for preparation to go home. Gathering homework, getting back packs, cleaning up in and around desks and classroom.(Fridays - clean out desk).
Create a folder for each day of the week. Use these for the things needed for that days lessons in. Example: copy work(handouts), paper for spelling lists,, etc... This makes it easier for the teacher and if there is a sub. All the days work materials are located in one place.
Do all copy work for the next week on Friday.