This simple, easy to use, rubric breaks down student analytical writing into 3 distinct categories, while providing assessment points regarding the quality of various components within the paragraph, such as treatment of textual evidence.
I use this rubric to not just score my students' writing, but they also use it in writing groups when evaluating each other's work in order to revise. After using it several times, students become very comfortable using this scoring tool.
The included file has two rubrics per sheet, to save paper when printing. The second page of the file is to be printed on the back of the rubric to allow for more thorough comments.