Edit the essay for grammar and mechanics, and add correct in-text citations plus a simple works-cited list for the evidence used.
Editing is a line-by-line pass for correctness: spelling, punctuation, subject-verb agreement, consistent verb tense, and run-on sentences. It comes last, after the bigger revising work, since there is little point perfecting the grammar of a sentence that might still get cut.
Any essay that uses outside evidence needs citations, so a reader can check the source and so credit is given fairly. A simple in-text style names the source right in the sentence or in parentheses -- for example, "(American Academy of Pediatrics)" -- and a short works-cited list at the end names each source, its title, and where it was found.
Mastery looks like: They correct grammar and mechanics errors in their draft and add accurate in-text citations plus a complete works-cited list for every source used.
Common stumbles: Doing a reasoning revision instead of a mechanical edit and mixing up the two jobs; using evidence without naming where it came from anywhere in the essay.
See it visually
Interactive, spoken-aloud tools that show this idea in motion.