Rubrics are excellent tools to help students understand the goals for projects and assignments. They are invaluable in helping teachers have a more objective way to assess work. Students know more clearly what a score or grade represents when they can read the detailed descriptors on a rubric scale. Writing rubrics can prove challenging, but there are many tools, resources, and samples available to help. You may want to start with a checklist which you can create easily on the Project Based Learning Website.