Even though group work is my favorite, I am drawn to this classroom arrangement. I think its the neatness of the room, and the close proximity of the students. I think this layout will benefit a large classroom that is more lecture-based.
Cell phones in shoe organizer with student numbers. They are at the front of the classroom so all have clear view of their phone and can't say that someone "messed" with their phone. They are numbered to indicate which phone belongs to which student.