Let's face it, students are going to leave the classroom! This form helps teachers keep track of who left the classroom and when.
When students leave the room on a pass they have to put the date, their name and the time they are leaving. When students return they write the time they returned as well.
This can come in handy to keep track of how often a student is leaving and how long a student is leaving for. I personally have had to use it as well when something happened in the bathroom. I was able to rule out whether or not it was one of my students!