Just shut up already!

So, in my piano class there is this one guy... He thinks he is so f-ing smart. He raises his hand and interrupts the teacher arguing with her about everything she says. "Um, Miss! Why do we have to do it like that?" Or "It's so much easier like this. Can't we just do it like this?" I honestly don't even know why he is taking the class since he obviously knows everything already. My teacher is a saint. She talks like a fairy godmother and is just the sweetest thing. She never loses her cool although I am sure he is driving her nuts! Everytime this guy raises his hand the whole class rolls their eyes and moans. I'm not exhaggerating when I say that half the class is wasted on this one guy and his quest to annoy. ARGHHH!