Professor Dawlish (джен)

Due to what Madam Umbridge is determined to call a paperwork mishap, Auror John Dawlish, over ten years in the force, finds himself headed back to Hogwarts as an interim professor. He's to wrangle a pack of Defense Against the Dark Arts students and keep Umbridge's seat warm for a few weeks while she gets things cleared up on her end. It'll be easy: she's provided him with a speech to give, a list of course aims, and a complete lesson plan covering the entire year.
What could go wrong?