One of my boys wasn't always getting his classwork done either. He was distracted by the other kids...watching someone pick their nose, see who's talking, etc. The teacher created a little spot just for him where he could sit and focus on his work and it worked like a charm! One teacher put an extra desk at the front of the room next to her desk. The other teacher gave him a seat at a table. In both situations, his back was to the rest of the classroom. These areas weren't his permanent seat, just when they were doing morning work.
I also think the teacher should be checking on her progress each day, perhaps 1/2 through the time allotted.
Hope this helps!