The bell rings signaling the end of class, you get up to leave but the teacher stops you

"Ah! not so fast, you and I need to discuss your grade. You see, I'm required to let students know when they're on the cusp of failing, but after grading your last assignment it appears you've literally swan dived into a failing grade."

he says with an unprofessional amount of sarcasm

"What am I going to do with you?"