It has always been the policy at our school that passes are at the discretion of the teacher. Since students are our responsibility during our class, we can determine whether they are allowed to leave the room for whatever reason. My policy since I have worked at this school has been that students aren't permitted to leave except in case of emergency. I expect students to handle personal business, including restroom use, during personal time: during passing periods, during lunch, and before and after school. I have always communicated this policy to students. Today a student asked to use the bathroom at the beginning of class during a quiz. I said no, she could go after class. The student didn't say anything else. After school the student's mom called me and was extremely upset. She told me that it was an emergency and that I should have let her daughter use the bathroom. I explained my policy and explained that the student never told me it was an emergency, in which case I would have let her go. Mom kept interrupting me and yelling at me and demanded a conference. I told her the procedure for setting up a conference (which is done through the office). While I understand Mom's anger, I do have my policy in place for a reason. Some students behave inappropriately in the hallways and bathrooms when they are unsupervised. This student in particular has a history of inappropriate classroom behaviors, and if I can't trust her to behave appropriately under my supervision then I don't feel like I can trust her to behave appropriately without it. I'm not trying to be mean. I'm trying to keep my students safe and out of trouble. When I told my supervisor about the situation to give her a heads up, my supervisor flat out told me that she won't support me on this, that I should allow all female students to use the bathroom whenever they ask. This is in direct contrast to what we have always been told, which is to keep students in our room and under our supervision whenever possible. So now I have to have this conference with Mom and either a counselor or an administrator, and I'm not going to be backed up. I'm going to look like an idiot at best, a complete b---- at worst.