Arthur: Welcome to the Worldwide Teaching Championships. In this corner, defending his title, the Sultan of Schooling, the Homework Hammer Nigel Ratburn! [CHEERING] Buster: Mr. Ratburn's looking good, but he's going to have to bring his A+ game tonight. Francine: He hasn't faced this tough an opponent since Lenny Long Division Spitz in last year's math relay. Brain: Capital of Benin? Mr. Ratburn: Porto-Novo. Brain: The moons of Mars? Mr. Ratburn: Phobos and Deimos. Arthur: And in the other corner, the Dynamo of Data, the number-crunching crusher from Cupertino, California, the Challenger! [CHEERING]