I sit my kids in groups of 4. I assign them each a number between 1 and 4. These are their jobs:
1. Paper Passers-teacher gives this person the papers, they pass them around the table and make sure everyone has one.
2. Supplies-gets supplies for the group, like math materials, crayons, etc.
3. Book Baskets-this person makes sure the book basket is nice and neat, collects the books, and puts the baskets away when needed
4. Paper Collector-collects the papers from the group and turns them in, or leaves them in the corner of the desk for the teacher to collect.
After a week, I change it so that all the 1s are the Suplies captains, the 2s are in charge of the Book Baskets, the 3s are the paper collectors, and the 4s are the paper passers, and it rotates weekly.