Sometimes we work on a book for years. It takes patience, faith, and a sense of adventure. This stage of the writing process involves correction, proofreading for spelling, grammar, and punctuation, and a concern for neatness. All pieces of the writing that are developed to the point of having an audience must be correct. This is especially true in the classroom, where a published work will be used as a model for others.
Correctness shows respect for one's audience.
Students are encouraged to proofread and self-correct their own work as much as they can, relying on the teacher for the final corrections. The teacher is an editor for students in the same way professional writers have editors to help them get their work ready to meet an audience. She is the first editor on all my books. I never show her my work until I've finished the first draft. Then I go somewhere else while she reads it.