This is how I keep track of where my students are during the course of the day. I started this last year because so many kids were going to different places I had trouble remembering who was where. I always had to ask the kids... they always know! Much of the time too many were in the bathroom and some who should never be together in the bathroom.... so door destinations was born!
Since our theme for the year was Travel, everything in the room was based on "Travel" so I put the kiddos names on tickets and laminated them. The colored pieces of paper are laminated and hot glued to the door. They are all the possible places they could go in the building. Each location has either 2 or three pieces of Velcro... that lets the kiddos know how many are aloud to that location at one time. I use stop signs over the bathroom so that they know when they can go and when they can not. It works really well.