Do you need a student friendly rubric that matches the SAGE writing test rubric?? This rubric has been created to help take teacher/educator language and make it understandable and accessible by students so they can properly assess not only their own writing, but peer reviews also. It includes the percentage breakdown for scoring as well that matches quite seamlessly.
This is specifically for grades 6-8, but you could take this idea and edit it to fit your grade level.
I have used this many times with my own students and it really helps them to know if they've met all the criteria for their essay. I put it in a page protector and students can use a dry erase marker to rate each component and then use the same page repeatedly.