What would a pre-K classroom be like without a little chaos? It would be boring, of course. Well, that's how the students in Mrs. Lewis's class feel. They love to play tricks on their teacher and always ?nd ways to wreak havoc. But today, Mrs. Lewis seems to have a trick of her own when she does not show up for class. Luckily, a bright student named Abby is the perfect substitute--well, that's how she sees it. After all, she does a great job taking...