The episode begins as the Simpson family plays Scrabble, in the living room, in an effort to build Bart's vocabulary for his aptitude test tomorrow at school. The game ends when Bart cheats and makes up an imaginary word, "Kwyjibo," and defines it as, "A big, dumb, balding, North American ape with no chin." Homer is instantly angered and chases Bart out of the room. The next day before class, in the schoolyard, Martin Prince, the school genius, tattles on Bart, for spray painting graffiti that defames Principal Skinner on the school building. Skinner orders Bart to see him after school. As the children file into class, Mrs. Krabappel hands out aptitude tests to everyone. When she instructs the class on taking the timed intelligence test, Martin raises his hand, and reminds her that Bart is supposed to face the window during any test so he can't cheat. A grumbling Bart turns his desk to face the window and the test begins. In an attempt to figure out a lengthy math word problem, Bart tries to visualize the problem so he can solve it. The visualization turns into a daydream and when Bart finally comes back to reality, Martin announces that he has finished his test already. Mrs. Krabappel sends Martin outside to read a book, during the remainder of the testing period. While Bart is still taking his test, he looks out the window to see a smug Martin sticking his tongue out at him. In retaliation, Bart makes faces back at Martin; Mrs. Krabappel spots Bart making faces and looks out the window to see what Bart is looking at. While her back is turned, Bart, who is seated at the front of the class, reaches over to Mrs. Krabappel's desk and steals Martin's test, replaces Martin's name with his own and then puts the test back on her desk. Bart then quickly fills out random answers on his own test and then writes Martin's name at the top and turns it in.
Later, after school, Marge and Homer are called to Principal Skinner's office for a meeting about Bart's behavior at school. Skinner informs Marge and Homer about Bart's graffiti from earlier that morning. As he reaches for Bart's rather extensive permanent record, and is about to suggest something along the lines of expulsion for Bart, his secretary buzzes in and says that Dr. J. Loren Pryor, the school psychiatrist is waiting to see him. Dr. Pryor walks in on the meeting, and surprises everyone when he tells them that Bart is a "gifted child," and according to the aptitude test from earlier, Bart has an I.Q. of 216. Dr. Pryor suggests that Bart's history of bad behavior stems from a lack of interest in his school work, due to the fact that it is too easy for him. Skinner wants Bart retested, but when Dr. Pryor suggests moving Bart to a school for "gifted children" Skinner jumps on board with the idea, and Bart quickly agrees when he hears that the school doesn't have much structure and that you get to make your own rules. Dr. Pryor hands Bart some paperwork for the "gifted children" school, and he, Homer and Marge leave the meeting stunned.
9 out of 10