S1·E6 Smart and Smarter

Corey's good grades land him in an exclusive school for the gifted. Phoebe gets jealous, and then suspicious after Corey tests higher than she does on an aptitude test. Kirk's enthusiasm over Corey's scores convinces him to attend an open house at the same school that's just rejected Phoebe. Even though Phoebe learns the truth about Corey's high scores, she decides to get even by remaining silent and letting Corey battle his wits with the other students at the gifted school.