First of all- I hate assigning every kid to a spot in my room. With over 400 kids in school it is a daunting task that I dislike very much. So, a few years ago a student helped me come up with this awesome idea that works awesome without taking a ton of my time. Win Win.
These laminated cards have a number on one side (telling them which table to sit at) and the back of the card has a shape of either a star, circle, or triangle. The shape tells them which seat is theirs at their table.
If there is a problem with where students are placed: by all means- move them. But I love this seating system because students know it's random and I'm not "picking" on anyone by placing them at a certain spot... or by someone they don't like. Any grumbling: I just say- just wait until next seating arrangement and you'll have a new spot!