This is a great new book published by IRA in 2011. It provides excellent mini-lessons for grades 4-6. Chapter 2, UNIT PLANNING AND THE SIX-TRAITS FRAMEWORK, deals specifically how to use the 6 traits to plan writing workshop for a variety of genres. The book contains 40 mini-lessons. The text is teacher friendly and set up with all of the organizational details of a plan book.
I highly recommend it. The author also has a similar text for K-3.