What are some of your procedures/policies for letting the teacher know when a student needs to use the restroom? I saw one classroom where the teacher had mini plungers. When a student needed to go, he/she placed the plunger on his/her desk. With a quick glance, the teacher knew who was out of the room and where. I'd use that, but we'll be in the same building and I didn't want to openly steal her ideas.