A similar situation happen to my DS7. During computer lab he had to use a restroom but didn't ask because the teacher she had already told the class if they didn't finish their computer typing that they would miss recess. When I picked Ds7 from school he had a change of pants. When class was over he marched straight to the nurses office and told her the situation. His teacher didnt even know he had change his clothes. I praised him for they way he handle the situation.Nobody knows but me the nurse and him. No child should have to go through that. I would take this situation to a higher authority. Remember we as parents are in charge