Marge: An A+! How Did You Do It? Homer: Oh, Let's Just Say I Had Help From A Little Magic Box.

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Marge: An A+! How did you do it?
Homer: Oh, let's just say I had help from a little magic box.
Marge: You changed your grade with a computer?
Homer: D'oh!
-- How'd she figure that out?, "Homer Goes to College"