Publish a finished opinion piece in letter format, using a comma after the greeting and after the closing.
This week your opinion becomes a real letter to a real person -- a parent, a teacher, or a friend. A letter starts with a greeting like "Dear Mom," and ends with a closing like "Sincerely, Sam."
Notice the comma: one comes right after the greeting, and one comes right after the closing word, before your name.
Mastery looks like: They publish a finished opinion piece as a letter with a correctly punctuated greeting and closing.
Common stumbles: Forgetting the comma after the greeting or after the closing word, since both are easy to skip in a letter format.
See it visually
Interactive, spoken-aloud tools that show this idea in motion.