"Teaching the status quo." joke

Scene - A grade one classroom on a warm summer
afternoon.
Teacher: We are going to have a spelling
competition this afternoon. Anyone who can spell a
word correctly can go home early. We'll start with
Mary. What did you do at lunchtime?
Mary: I played in the sand-pit.
Teacher: Mary, can you spell "pit?"
Mary: P... I... T?
Teacher: Very good, you may go. Now Tommy, what
did you you do at lunch?
Tommy: I was playing with my toy car.
Teacher: Tommy, can you spell "car?"
Tommy: C . . A . . R
Teacher: Very good, you may go. Now Johnny, why
are you crying?
Johnny: (sniff) 'Cause Tommy and Mary wouldn't
play with me at lunchtime, just 'cause I'm black
(sniff).
Teacher: My my. That's racial prejudice. Johnny,
can you spell "racial prejudice?"