I would try for a writer's workshop approach--lots of choice, lots of writing, but only choosing some items to take through the entire writing process. The idea of sh!tyy first drafts and that all writers revise and edit, and keeping an audience in mind for those final products--that can help free done up from perfectionism. In the Middle by Nancy Atwell is a great book, along with others, there's one that's fantastic and I can't remember the the title but I'll see if I can dig it out of my three-deep stacked shelves... But your library probably has good writing books. Or peek into a big selection at the bookstore for ideas. Anyway I'd say writing different forms and genres, lots of informal and then trying different styles, writing on beloved topics or for real purposes, journaling and creative writing, along with reading good examples of all kinds of writing--that can help. You'll figure out something that appeals to her. Good luck!
