Writing

I have already started looking for curriculum for summer school. I think I want to focus only on writing this summer. I have looked at the "Lea.rn to Wr.ite the No.vel W*y", but I am not sure it will work for all levels. Any other good recommendations? I have a beginning reader, an emerging reader and a fluent reader. I think I want to work on story writing, maybe some character development and definitely sentence/paragraph structuring.