Will inter-school rivalries undo all the hard work Monica and her friends have done to help hungry horses?

Claudia and Monica are brand new freshmen at Pine Creek High, and they are finding that relationships sometimes change as you grow up--will high school pull them apart or will they remain best friends?

The science fair is coming up at school, and Kyle and Mia agree to help Ryan, who knows very little about animals, with his project--seeing whether music makes mice smarter.

Thirteen-year-old Claudia learns about the American justice system when, while studying for an American history quiz at Anna's house, she and her friend Monica are accused of stealing ten dollars and their classmates believe them to be guilty, based on circumstantial evidence.

Life in middle school can be complicated. Dealing with bullies. Putting up with the popular crowd. Playing sports and participating in activities. Plus, managing homework and studying! But Claudia can help uncomplicate things. She offers advice on everything from decoding teacher personalities to getting involved at school.

When seventh-graders are assigned to find jobs for Work Week, Claudia decides to work at her father's computer store but faces problems during the first day on the job.

Claudia and Anna are in a contest to see who raises the most money for their class. Anna's team are selling fashionable clothes but Claudia thinks her team has a chance with their collectibles.

Claudia is determined to plan the perfect party and out-do Anna; but first she must work to earn enough money to rent a hall, a band, and supply food.

Paired with Jenny, the school bully, for a science project, Claudia must find a way to get along with and understand Jenny and her bullying behavior.