What is expected in revision? How much should be revised?
A revision is not to be confused with mere editorial changes. Revisions are usually substantial, often requiring rearranging the flow of text, excising entire paragraphs and adding new themes or arguments. Of course, revision may not be needed if the quality of submitted work is high enough. While you need not require revision for all assigned writing in the course, it is instructive to remember that professionals often revise their work several times before it is considered finished.