The Simpsons Season 20 Episode 11
How the Test Was Won
Bart gets a perfect score on a practice test for a national achievement test, which not only rattles Lisa, but it means Bart gets to attend a special party instead of having to take the actual test. Meanwhile, Homer must avoid injuring himself for an entire afternoon after failing to pay his insurance.
Guest Stars
Marcia Wallace
Edna Krabappel (voice)