Modify Existing Rubrics/Rubric Banks
Modifying Existing Rubrics
Rather than creating rubrics from scratch, it may be preferable to use or adapt an existing rubric to the purpose of an assessment project. Many universities and professional associations have made their rubrics widely available and, in some cases, the rubrics have been extensively vetted by experts. The steps for modifying existing rubrics are the same as creating and evaluating rubrics. Examine the criteria to determine if they accurately reflect the skills and abilities students are expected to demonstrate. Review the levels of achievement to determine if they indicate sufficient ability as well as top and bottom levels of performance. Check the descriptors to make sure that they clearly describe the different levels of ability for each criterion. As necessary revise, remove, and add criteria, levels of achievement, and descriptors.
Rubric Banks
The American Association of Colleges and Universities (AAC&U) as part of its Valid Assessment of Learning in Undergraduate Education (VALUE) gathered, analyzed, synthesized, and drafted institutional level rubrics for 15 of the AAC&U's Essential Learning Outcomes with teams of faculty and other academic and student affairs professionals from over 50 institutions.
Numerous rubrics from many sources and disciplines compiled by Winona State University.
Collection of rubrics from University of Hawaii, Manoa.
Large collection of rubrics 
from the websites of many different colleges and universities.
Collection of rubric links and resources from the Center for Teaching, Learning & Assessment at the University of Indiana, Kokomo.
Extensive list of links to rubrics for many types of learning outcomes from California State University.
Additionally most on-line rubric generators, in addition to allowing you to create your own rubrics, generally have a collection of rubrics available. Online generators include: