Yes, they're children. They're 15 years old and they don't know what clothes they want to wear, never mind what they want to do with their lives.
When I did my GCSEs, in a very strict independent school, the pressure was so bad that 4 of my schoolmates had eating disorders, 3 were pregnant, at least 3 had drug addiction and 2 turned up to exams drunk.
This was only 20 years ago.
My child is doing GCSEs this year and I've told them to try their best but, under no circumstances, to feel pressured into anything!!