The Simpsons - Season 14 Episode 12
I'm Spelling as Fast as I Can

Lisa competes at a spelling bee and earns the right to compete in the Spell-lympics, becoming the pride of the town. The host of the show George Plimpton, asks her to intentionally lose so that a more popular boy can win. Lisa refuses and continues to compete, but accidentally misspells a word and loses. Meanwhile, Homer tours with a group obsessed with eating Krusty Burgers latest sandwich.