20.0 % Mechanics of Writing (includes spelling, punctuation, grammar, language use) | Surface errors are pervasive enough that they impede communication of meaning. Inappropriate word choice and/or sentence construction are used. | Frequent and repetitive mechanical errors distract the reader. Inconsistencies in language choice (register), sentence structure, and/or word choice are present. | Some mechanical errors or typos are present, but are not overly distracting to the reader. Correct sentence structure and audience-appropriate language are used. | Prose is largely free of mechanical errors, although a few may be present. A variety of sentence structures and effective figures of speech are used. | Writer is clearly in command of standard, written, academic English. | |