4th grade
Here are some tips off the top of my head:
1. Assign each student a number. Very useful for filing papers, etc.
2. Assign classroom jobs so you don't have to do all the work. I even have a student whose job is to take everyone's homework each day and put it in number order so that grading and recording is much easier for me. Plus I can see whose is missing right away.
3. Communicate well and often with parents.
4. Make all your copies weekly. Then file them by day. I have a shelf with 5 sections, one for each day of the week. I stay late on THursday and make all my copies until next Thursday.
6. Recruit parents help: for laminating, grading (easy things like spelling), etc.
7. Hand signals for water fountain, bathroom: in my class, while I was teaching a lesson students were encouraged not to use the bathroom or water fountain. They were only allowed to go during independent work time, break time, recess or lunch. But if they HAD to, they could hold up 1 finger for water fountain and 2 fingers for bathroom. That way I could just nod or shake my head and go on with what I was teaching without having to interrupt the lesson.