Third grader Judy Moody is in a first day of school bad mood until she gets an assignment to create a collage all about herself and begins creating her masterpiece, the Me collage.
When her substitute teacher realizes she is struggling in math, Judy is sent to a math tutor at the local college and soon is completely into the spirit of college life.
When Judy Moody gets serious about protecting the environment, her little brother Stink thinks she is overdoing it, but she manages to inspire her third grade class to undertake an award-winning, environment-saving project.
While older sister Alex is trying to orchestrate a perfect first kiss with her heartthrob and younger sister Joey prefers frogs to boys, Stevie Reel wonders if she is ready for a boyfriend while being pursued by a new boy in her class.
When her substitute teacher realizes she is struggling in math, Judy is sent to a math tutor at the local college and soon is completely into the spirit of college life.
In Acton, Oregon, sisters Alex, Stevie, and Joey take turns telling about their lives, including their long line of actor ancestors, creative family dinners, toe marshmallows, swearing in Shakespeare, and the Sisters Club.
When Stink discovers that Pluto has been downgraded from a planet to a dwarf planet, he launches a campaign in his classroom to restore its status to that of a full-fledged member of the solar system.
Remembering the countless ways her mother's previous birthdays have been ruined, Judy Moody wants to get things right this time around and tries to organize the perfect birthday.