Bart vs. Lisa vs. the Third Grade
The Simpsons: Season 14, Episode 3
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Lisa has competition for the class brain role when she is promoted to the third grade. It comes from Bart, who's been demoted to the same class.
Show: The Simpsons
Air date: November 17, 2002
Writer: Tim Long
Chalkboard gag: "Fish do not like coffee."
Episode no: Season 14; Episode 3