DD in Y11. She is doing an average amount of work and on track for good grades. She does three subjects a day that only last for 50 minutes each. She also takes Art Textiles which she spends a disproportionate amount of time on. On an average weekend, she will procrastinate until about midday on Sunday to do any work in her sketchbook. This leads to a long, 8 hour marathon to attempt to finish a labour-intensive subject. She will stay up until 2 or 3 o'clock in the morning and I am worried she could be sleepy at school. I advised her to let the subject hang and don't mind her failing Textiles as long as she focuses on her other subjects, such as Maths, Biology and History. She replied, saying her teacher will shout at her if she doesn't complete the work. Am I doing the wrong thing by telling her to fail Textiles on purpose? Is she already doing enough work?