When a third grade classmate gets her picture in the paper for winning a spelling bee, Judy is determined to find a way to become famous herself.

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.

After learning about the American Revolution on a family trip to Boston, Massachusetts, Judy Moody makes her own Declaration of Independence and tries to prove that she is responsible enough to have more freedoms, such as a higher allowance and her own bathroom.

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.