Here are some links on how to and why to create rubrics.  The first three links will actually help you make a customizable rubric. 

Websites to create rubrics:

http://www.teachervision.fen.com/teaching-methods-and-management/rubrics/4521.html?detoured=1

http://rubistar.4teachers.org/index.php

http://www.teach-nology.com/web_tools/rubrics/

Articles on rubrics:

http://www.carla.umn.edu/assessment/vac/Evaluation/p_7.html

http://www.education-world.com/a_curr/curr248.shtml