The Purdue OWL (online writing lab) has some great resources for teaching writing. They may be a little ahead of where she is right now, but there may be some sections that you could draw on now, and you might want to keep the rest bookmarked for future use.

I have some other specific tips on how to teach writing, but, alas, no time right now to post them. I'll try to get back in the next few days to put them up here.