How will the students be evaluated? What assessment tool will you be using? If you want, you can sign up to be able to upload HTML pages, see http://TeacherWeb.com/Help.htm#q18, and then you can actually upload your rubric for your students to view online.
The links given below are examples of good Evaluation pages.
Radio Days http://www.thematzats.com/radio/index.html#Eval
Bringing Lyrics to Life: A Multimedia Music Book http://php.indiana.edu/~ylo/music/evaluation.html