Wow, that sounds fascinating and challenging at the same time. Do the kids spend time outside in nature? Writing can also be linked to social studies/science/art etc.
Wishes? Dream? Poetry? Family? More opinions. Challenge some of their gender assumptions (as much as you can if the religious doctrine permits) There are many children in the world who live under similar circumstances - do they allow religious music? Maybe they could try their hand at some hymns.
You could model writing about your own school experiences.
Write about books you have read together in class. Hope this helps - keep us posted - I would love to hear more about your experiences.
Steph:)