It's "hole day," and even Mrs. North and Principal McCabe are wearing their very worst clothes. Now they're expecting company. The president - of the United States - is on his way.
Marvin is pleased when his teacher asks him to take care of her dog while she's away, but he soon finds that there's more pressure involved than he likes.
Marvin Redpost suddenly figures out why he has red hair and blue eyes, while everyone else in his family has brown hair and brown eyes. He's not really Marvin Redpost at all. He is Robert, the Lost Prince of Shampoon! Soon his friends are treating him like royalty. Now all he has to do is break the news to his "parents.".
The rumor is going around that Marvin Redpost is the biggest nose-picker in the school. Clarence started it, and now everyone is acting like it's true. Even Marvin's best friends don't want to be seen with him. It's unfair! But what can Marvin do about it?.
An unmanageable, but loveable,eleven-year-old misfit learns to believe in himself when he gets to know the new school counselor, who is a sort of misfit, too.
Two days after Marvin sees a glowing green thing that looks like a flying birthday cake in the night sky, his third-grade class is joined by a mysterious new boy with peculiar behavior.
David receives a curse from an elderly woman he has helped his schoolmates attack, and he learns to regret his weakness in pandering to others for the sake of popularity before new friends and a very nice girl help him to be a stronger, more assertive person.
Relates humorous episodes from life in the classroom on the thirtieth floor of Wayside School, a building that was accidently erected sideways, with one classroom on each story.