Ms.H: Lisa, what nineteenth-century figure was named `Old Hickory'?

Ms.H: Lisa, what nineteenth-century figure was named `Old Hickory'?
Lisa: I don't know. You? [snickers from the class]
Ms.H: Lisa, if you'd bothered to do the assignment, you'd know the
answer is... [flips to answer key] The Battle of New Orleans.
I mean... Andrew Jackson.
Lisa: Well, you're earning <your> eighteen grand a year. [more snickers]
-- "Separate Vocations"