“I thought I had revised my assignment, but my instructor said I’d just corrected the typos.” It’s always a good idea to clarify what revision means with a particular instructor. Generally, though, when a writing teacher asks for a revision, minor corrections will not be enough. Plan to review your entire draft, looking first at the big picture—the thesis or overall argument—and be prepared to make major changes if necessary. Look for sentence-level errors and typos last, during the editing stage, since you may delete or change these as you revise.