Hogwarts: Voldemort Please Don't Interfere with My Teaching

"Snape, what qualifications do you have to teach me a lesson? The fourteen doors of Hogwarts are on my shoulders. It is not your turn to say the words "Happy Learning". "Harry, what's so interesting about the little conflict between professors? Hurry up and go back to evening study." "Ron, I have assigned you five years of O. W. L. And three years of N. E. W. T. Have you completed it?" "Miss Hermione, the project plan is on your desk. The topic this time is the modular design of the broomstick." "Mr. Malfoy, if you want to transfer to another school, you must get an O in my class." Audie Murphy coaches Hogwarts with an Eastern soul. Even if Tom Riddle appears in front of him, he will still deduct points if he fails. Ps1. The protagonist serves as an alchemy professor and assists in the Defense Against Dark Arts class ps2. The timeline is when Harry enters school