It seems that my students constantly want passes so now each of my students may only have three passes every nine weeks. Each time they use a pass, I mark it on the list next to their name. After their third pass, they need to make up ten minutes of class during their lunch period. This way, if a student really does need to 'go' they can but if they just want to roam the halls they will think twice. I've only had one student opt for the lunchtime payback.