Move pupil plus their photographs to a new class

Please can someone help.
I have 18 classes. Each year the pupils move to a different class (they don't move as a whole class). I want to move each pupil plus all their photographs of art work to their new class. How can I do this for each pupil?

Thank you

Hello Aly,
I'm afraid that can't be done in bulk yet. We'll keep it in mind for our next update though