Lionel's many school-related adventures include a nervous Back-to-School night with his parents, the welcoming of a new classmate, a sister who doesn't seem to recognize him, and an experiment with time.

Fifth-grader Cam uses her photographic memory, with help from her friend Eric and his twin sisters, to solve the mystery of Poochie, a famous canine television star.

Fifth grader Cam Jansen uses her photographic memory to help find a pickpocket at the circus.

When a cat appears in their classroom one rainy day, Cam and her friend Eric figure out where it came from. Can Cam and her classmates find out who owns the cat they find in their classroom?

To celebrate their 100th day of school, Cam and Eric's class party will have snacks that start with "P"--pretzels, popcorn, pineapple juice, and pizza. But when the pizza disappears from the kitchen, it's up to Cam and her photographic memory to solve this delicious mystery.

Cam's photographic memory helps a scatterbrained substitute teacher, especially when he discovers that he has misplaced his coat.

When a woman's poodle disappears during a boat ride around the city, Cam uses her photographic memory to solve the mystery.

Lionel counts down the days to his birthday party by making a time capsule and by letting his sister know what he wants for a present.

Cam helps her friend Eric when he misplaces his permission slip to go on the school field trip.

Cam Jansen, with Eric at her side, helps solve the mystery of what happened to Mr. Day's tennis trophy.