I have some experience with creating and assessing with rubrics. I use RubiStar to create them. It has some good samples on all kinds of topics related rubrics. In fact, my students are so used to be assessed with rubrics that they (and their parents) don't even ask "Why's my grade ..X..?" They refer to the rubric and know before I even have the chance to elaborate. I have my rubrics displayed in the classroom and on my web-site for students and parents.
Here's a sample rubric about collaborative activity, taken directly from RubiStar site. .