Meek for a Week & Arthur, World's Greatest Gleeper

Meek for a Week: Muffy bets Francine she can not be nice to everyone for a whole week and she can not tell anyone about why she is being nice. Arthur and his friends are worried when Francine starts acting nice for no apparent reason and are worried she may "pop" if she continues bottling up her anger. They try fruitlessly to diffuse her.
Arthur, World's Greatest Gleeper: Arthur and Buster sit at the only available table with the Tough Customers. Buster claims that Arthur is the world's greatest "gleeper" to stop the teasing, only to find out later that "gleep" means "steal". Arthur lets the lie grow into a school-wide rumor.