It invites re-reading. Content is unified and generally coherent. Key ideas are supported with details. Few grammatical and spelling errors. Sentence patterns are sufficiently varied to keep reader interested.
Diction is generally concise, accurate, and appropriate to audience and purpose.
Content may be ineffectively organized, with weak or missing transitions. Diction is limited in range, occasionally marred by repetition, redundancy, imprecision. Sentences may be choppy, monotonous. Thesis may be unclear or missing. Organization is neither clear nor effective.