This has been a highly valuable and beneficial self-assessing tool in my classroom. I choose one problem to focus on where students must show how he/ she solves it. Then I have students self-assess his/ her work using this rubric. Next, I partner each student up with a partner. In a different color, the partner assesses the work. This was a highly reflective process for my students. I would also pull small groups based on these results. This rubric was based off an idea from the book Seven Strategies of Assessment for Learning by Jan Chappuis but rewritten into a more child-friendly way.
Also check out!
Distributive Property Common Factor with Fruit Loops
Math Student Rubric - FREE!!
Utah 6th Grade SEED Science Task Cards