The following sites contain excellent sources of rubrics for you to use in your classrooms. On these sites you can create your own rubric, modify a rubric from their library, or use one that is already prepared.
RubiStar
www.rubistar.4teachers.org
Rubrics for web lessons
http://www.edweb.sdsu.edu/webquest/rubrics/weblessons.htm
"Rubrics from The Staff Room for Ontario Teacher"
http://www.odyssey.on.ca/~elaine.coxon/rubrics.htm
Kathy Schrock's Guide for Educators - Assessment Rubrics
http://school.discovery.com/schrockguide/assess.html
Teacher Rubric Makers
http://teachers.teach-nology.com/web_tools/rubrics/
California State Department of Education SCORE Language Arts Rubrics
htttp://www.sdcoe.k12.ca.us/score/actbank/trubrics.htm