The trials and tribulations of secondary school

After 4 years of torture and stress (from my daughter) I have finally relented and allowed her to change secondary schools. You may think "so what?" but it grieves me to allow this to happen. I can see her morphing into a "skankyho" or worse. She laughs at me and says that it will never happen to her, but I have been warned about teenage girls and their ability to change overnight into a snarling mass of hormones. Now it's the subject choice, because they always know whta they want to do in the future. I am trying to steer her away from the sugary coated subjects and keep a little scholastic content, but I'm only the mother and what do we know?