Even the best teachers can have an oopsy day. Sometimes things just don't go their way. Uh-oh! Mr. Bungles drips jam on his tie at breakfast. His students play a trick on him at school. And the class hamster, Nibbles, escapes from his cage! Mr. Bungles and the class chase Nibbles through the halls and into town. But can they catch the hamster?

Stephanie Calmenson was an elementary school teacher, children's book editor, and Editorial Director of the Parents Magazine Press before turning to writing full time. Her books have been called "marvelous" (Publishers Weekly), "lyrical" (School Library Journal), "hilarious" (School Library Journal), and "sweet, funny, and right on the mark" (Booklist). Her most popular titles include Dinner at the Panda Palace, a PBS StoryTime Book; The Principal's New Clothes; Late for School!; Welcome, Baby!; and Rosie, A Visiting Dog's Story. She has collaborated on anthologies and chapter books with Joanna Cole, author of the Magic School Bus series, and with Ann Martin creator of The Baby-sitter's Club series.