The story about eleven-year old Harriet, who is a spy, plans to be a writer, and keeps a secret notebook filled with thoughts and notes on her school mates and people she observes on her after-school "spy route." However, when her classmates find and read her notebook, their anger and retaliation, and Harriet's unexpected responses, explode in a hilarious and often touching manner.

After studying really hard for a math test, Claudia is accused of copying off of someone else's test. The Babysitters come to her aid.

Mrs. Toggle and her class prepare for the arrival of a new student whom they expect to be a dinosaur.

The part of third grade Ellen Tebbits likes most is having Austine Allen for her best friend.

Heidi tries a succession of ways to make her fifth-grade teacher less mean.

Two teenage loners become involved in the senior class play which helps them understand the meaning of friendship and betrayal.

Sent to pirate school against her will, Maisy Pickles organizes a mutiny among the students.

Monique hates her school uniform, so she tries to find a way to make her individuality shine through.

Morris the moose has an exciting day in school learning the alphabet, counting, singing, spelling, and doing other things that make him a unique moose.

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.