"Your apology is appreciated and I feel that your other teachers would appreciate an apology so that is your first task for redemption. I want to hear from all members of staff that by the end of your next lesson with them you have given a proper apology. Also understand this Mr Weasley. I am giving you a chance to show me that you have what it takes to impress." The fact that he would get no more than the one was left unsaid but clear to him.