Diane deGroat

When Gilbert forges other students' names on some mean valentines, his trick is soon discovered and his classmates are angry.

When Gilbert and Lola's cousin Wally comes to visit for Easter, he learns a lesson about being greedy during the annual Easter egg hunt.

Gilbert seems to be the only one in his class who cannot think of any ideas for an Earth Day project.

Gilbert the opossum gets stuck with a tattletale "buddy" on a class trip to Pilgrim Town.

Gilbert and his first-grade classmates are nervous about their performance on the last day of school, curious about the awards they will receive, sad to be leaving their teacher, and excited about summer vacation.

On April Fools' Day, Gilbert is unhappy that everyone is tricking him and he is unable to get them back, but then he thinks of a great way to fool his best friend. Includes tricks hidden in the illustrations for the reader to find.

Gilbert is nervous about portraying George Washington in front of the class, and he feels even worse when he cannot find his main prop.

Before Lewis's birthday party, Gilbert's mother wisely substitutes a toy for the frying pan Gilbert wants to give Lewis.

While Alex sleeps, his dog Homer dreams about the game that will determine whether his team, the Doggers, or their opponents, the Hounds, will be champions of the world of dog baseball.