Correspondence Course

Seventeen-year-old Remus Lupin and Sirius Black get summer jobs as instructors for the Kwikspell Correspondence School.
Disclaimer: This story is based on characters and situations created and owned by JK Rowling, various publishers including but not limited to Bloomsbury Books, Scholastic Books and Raincoast Books, and Warner Bros., Inc. No money is being made and no copyright or trademark infringement is intended.