This rubric is differentiated for Students with Disabilities (contains bonus standard rubric as well). It is a Word Document, so feel free to change it to suit the needs of your students. The rubric has a "check off" list in each category (Organization, Content, Mechanics, and Language), so students can have ownership over their grades. Common Core Learning Standards are written in the header portion. This is a rubric for an opinion/persuasive piece in the format of a letter.