Here is the dialogue you shared:
- MITCH :
You may teach school but you're certainly not an old maid.
BLANCHE:
Thank you, sir! I appreciate your gallantry!
MITCH:
So you are in the teaching profession?
BLANCHE:
Yes. Ah, yes...
MITCH:
Grade school or high school or--
STANLEY [bellowing]:
Mitch!
MITCH:
Coming!
BLANCHE:
Gracious, what lung-power!... I teach high school. In Laurel.
MITCH:
What do you teach? What subject?
BLANCHE:
Guess!
MITCH:
I bet you teach art or music?
[Blanche laughs delicately]
Of course I could be wrong. You might teach arithmetic.
BLANCHE:
Never arithmetic, sir, never arithmetic!
[with a laugh]
I don't even know my multiplication tables! No, I have the misfortune of being an English instructor. I attempt to instill a bunch of bobby-soxers and drug-store Romeos with reverence for Hawthorne and Whitman and Poe!
MITCH:
I guess that some of them are more interested in other things.
BLANCHE:
How very right you are! Their literary heritage is not what most of them treasure above all else! But they're sweet things! And in the spring, it's touching to notice them making their first discovery of love! As if nobody had ever known it before!