Hi Clodagh,
I did an activity like this years ago when I was teaching in the UK, with second level students.
I asked them to keep a Moon diary of the shapes they could see (similar to this one : https://www.mayodarkskypark.ie/wp-content/uploads/2023/11/MDSP-MoonJournal-v1.pdf )
and had one girl draw me out this shape.
I guess she had looked up the phases of the moon, seen 3rd quarter Moon and not done any actual observing!