Having trouble keeping track of those students that seem to always have to go to the bathroom or locker during class time? Here's a great solution that I created.
I allow students 3 passes out of class per semester. They must have the card in their possession or they cannot go. There are three checked boxes that I hole punch to keep track of how many times they have gone.
This is a great system that takes all of the pressure off the teacher and gives all of the responsibility to the students. I usually print them on a different color each semester and make sure they have the students' name on it so there is no carry over and no switching between students.