This annoys me a bit from the point of view of an extracurricular teacher.
Why do schools think it's ok to set large amounts of homework to be due in the very next day? What if the student has an extra curricular class?
I am a firm believer that students with extracurricular classes, sports and hobbies must learn to manage their time efficiently and prioritise their school work, but at the same time giving them less than 24 hrs notice to complete work is ridiculous and leaves students with outside classes and hobbies at a big disadvantage. Having something to focus on outside of school can be a positive; we all want our children to grow up to be well adjusted, well rounded individuals and part of that can include having an interest or hobby. , For some children it is more essential than for others - some may feel it is good for their mental and social wellbeing, others may struggle academically and enjoy channelling their energy into a different (no-academic) outlet and some may have a particular skill or talent that deserves to be nurtured. Some of these children will have have started their extracurricular hobby at a very young age (some as young as 3) and stuck at it over many years to the point at which they have become reasonably or very proficient, and it is a shame to see children dropping much loved hobbies during their GCSEs or A-Levels.
It is essential that students who do attend a regular club or class learn to make sure that they complete their homework during the free time that they do have, but schools giving homework to be in the very next day don't allow their students to do this. No child should have to give up hobbies for school exams - cut back to a realistic amount of hours per week, but not give up.
OP - are you certain that all of the pieces of homework were set on that particular day, or were some that your DD had put off until then, and that coupled with the extra work set ended up with a huge workload? Is this amount normal for her school (you don't say if it's a state or private school)? It seems like a lot to be set in one day to be returned the very next day, even for her age (and I have two daughters one has just taken A Levels, the other is Yr 10) and I would be a bit concerned if this was happening regularly.