I really like this idea for the younger grades. I am a big fan of students working with others, because I believe that is when you learn best. But there are times when it needs to be independent work and I think this is a great way to monitor the noise level in the classroom.
Opportunities to write in every area of the classroom. It is so important that those children who never choose to enter the mark making areas are receiving the same chances in other areas of their play.