https://www.learner.org/workshops/hswriting/interactives/rubric/sample.htmlIf you only look at one link, look at this one as it has it all, concisely explained.
Here is a different simple tool for creating rubrics once you understand how to do it:
http://rubric-maker.com/For those of you who want to know more about PBS and how to assess it, here is a great website that will help you create your own assessments as well as examples provided, organized by grade level.