All kids are different. Some won't need to do any work to get top marks, others could work around the clock and come nowhere close.
What does she want to do after Yr 12?
If Uni, what grade does she need, and how much work do you reckon she'll need to do to get it?
If not uni, or at least not yet, and she finds homework stressful, let her de-stress. Plenty of "pathways" as they call them, to getting into the course she might want later.
