Other
Kathy Schrock: Assessment and Rubric Information
Kathy Schrock has gathered over forty rubric possibilities for assessing student work in all subject areas and grade levels. Some pages allow a teacher to create a custom rubric, as well.
Other
Rubi Star: Create Rubrics for Your Project Based Learning
RubiStar is a tool that helps teachers develop rubrics. After students have done the project and the rubric has been used to grade it, you can enter the data into RubiStar to determine which items are problematic for the class as well.