Open ended assignments (e.g., projects) as well as authentic (performance-based) assessments (Wiggins, 1990) need well defined criteria for the student to be able to self-assess processes and products and for faculty to be able to give feedback with the same lenses to all students. Rubrics serve this purpose.
There are many rubric development sites available. RUBRICS FOR ASSESSMENT, RUBRICS FOR TEACHER include collections of rubrics in different domains that may help educators understand the logic of building rubrics and select and use those that fit their needs.
There are also free tools available, such as RUBISTAR, a tool to help teachers create quality rubrics and IRUBRIC from RCampus, which supports creation of rubrics and hosts them online. Rubrics created with iRubrics can be used as a stand- alone or as part of RCampus interactive learning resources, where results from applying the rubric are kept in a grading system.