mould of the nation

my company's motto is 'to mould the nation'. this is what i overheard.

Angry Parent: "Mr X, I am unhappy with the way you punished my son. You made him stand outside the class, missed the lesson and thus depriving him of knowledge when hhis exams are two weeks away."

Mr X: "Mr Angry Parent, I had to punish your son as he has forgotten to bring his textbook for my lessons without fail every week. On top of that, he is always distrupting the lesson by arguing to the teacher and disturbing his classmates."

Angry Parent: "What give you the right to hold back the knowledge from my son by putting him outside the class? Are you going to give him one-on-one tuition of the lesson after that? Is this how you teachers mould the nation?"

Mr X: "Mr Angry Parent, firstly, your son is like the mould on a bread. Secondly, if your son had brought his books, paid attention, do not disturb his classmates, I would not have to resort to putting him outside the class.

Mr X is a damn cool teacher. *Amazed with admiration*