Lyrics:

[Mr. Mackey] (Eric Cartman)
And everyone should get along..
Okay children quiet down, quiet down
Children I'd like to introduce our new substitute teacher for the day
His name is Mr. Shady
Children quiet down please
Brian don't throw that (SHUT UP!)
Mr. Shady will be your new substitute
while Mr. Kaniff is out with pneumonia (HE'S GOT AIDS!)
Good luck Mr. Shady

[Eminem]
Hi there little boys and girls (FUCK YOU!)
Today we're gonna to learn how to poison squirrels
But first, I'd like you to meet my friend Bob (Huh?)
Say hi Bob! (