As a 15 year old girl in a similar position to your daughter may be I can offer some help. I think you'll find most teenage girls, will try and hold it for as long as possible and I know sometimes that can lead to accidents. I have a small leaks a couple of times a week, largely from leaving it too late. I completely wet my pants in the day about once a week nowadays. In the daytime I tend to wear sometime like a Poise or Tena Lady pad for those left it a bit too late times. During exams at school, I wore (and used) Tena Discreet pants. I used to wet myself a lot more often, because I never used to try and find a toilet until it much too late, like your daughter. My mum used to try and humiliate me over my wetting, I think she knew that it wasn’t always purely accidents, she used to loudly say things like “Natasha, do you need to go to the toilet, we don’t want any more accidents” in front of friends and family. She even used to put her hand up my skirt and say “Are you wet Tasha?” as she meet me from school.