Teachers can use this system without students waiting in line to teacher-student edit writing. Students will put a clothespin on with their name and/or student number on in it. They will put their clothespin on the next available spot to be called to edit with the teacher.
*Also a poster available to guide students what to do when they are ready to meet with teacher, but it is not their turn yet.
For more ideas: http://livelaughlearnandteach.blogspot.co.uk/2014/08/writing-writing-writing.html