I just got a fantastic book for writer's workshop with primary students. It's called No More "I'm Done." You can read the entire book online for a short while at the link below.
http://www.stenhouse.com/shop/pc/viewprd.asp?idProduct=9196&r=
http://www.stenhouse.com/shop/pc/viewprd.asp?idProduct=9196&r=#toc
