Judy Moody's new friendship with Amy Namey causes problems with her old friends and the school project they are working on together.

Although Arthur and Francine aren't speaking to each other, they must find a way to set aside their differences when they are locked in the library after it closes.

When Buster defeats the Brain in a math contest, he is chosen for the school mathathon. Crushed, the Brain says he's decided to become a comedian and declares Buster the new "brain."

Tracy's long friendship with unconventional Kelly is strained when Tracy's new friends put pressure on her to choose between them.

Jill goes along with the rest of the fifth-grade class in tormenting a classmate and then finds out what it's like when she, too, becomes a target.

Samantha is determined to help nine-year-old Nellie, attending school for the first time, with her school work and learns a great deal herself about what it is like to be a poor child and work in a factory.

Ten-year-old Ernest lives a boring existence in Paris with his grandmother until a lively girl named Victory enters his class at school.

When sixteen-year-old Matt is falsely accused of threatening to blow up his high school and his friends turn against him, an unlikely classmate comes to his aid.

Unable to compete with her friends' fancy clothes and running ability, irrepressible six-year-old Junie B. finds her own way to make the new boy at school like her.

Ten-year-old Mandy must endure torment from three nasty bullies in school, but she finds solace in a new friendship with an older girl.