As the new Keepers of the School, sixth-graders Ben and Jill must decipher a handful of clues written as maritime riddles to save their school from demolition by a greedy company.

Nick Allen is very bright, but he often gets into trouble at school. When he starts fifth grade with Mrs. Granger, who has a reputation for never letting her studnets get away with anything, it looks like his trouble-making days is over.

Twelve-year-old Greg, who has always been good at moneymaking projects, is surprised to find himself teaming up with his lifelong rival, Maura, to create a series of comic books to sell at school.

The Grayson twins are moving to a new town. Again.Although it's a drag to be constantly mistaken for each other, in truth, during those first days at a new school, there's nothing better than having a twin brother there with you. But on day one of sixth grade, Ray stays home sick, and Jay is on his own. No big deal. It's a pretty nice school, good kids, too. But Jay quickly discovers a major mistake: No one seems to know a thing about his brother....

Life is usually easy for popular fifth grader Hart Evans, but when his music teacher puts him in charge of the holiday concert, Hart must use all of his leadership skills to unite the other students.

Sixth-grader Ben Pratt's life is full of changes that he does not like--his parents' separation and the plan to demolish his seaside school to build an amusement park--but when the school janitor gives him a tarnished coin with some old engravings and then dies, Ben is drawn into an effort to keep the school from being destroyed.

When Jake was 3 years old at Miss Lulu's Day Care Center, what did he know about bullies? Nothing. But he learned fast. Now Jake's in 4th grade and he can look back and see that the year that made the differencewas second grade.

It's an ordinary morning in Walla Walla until Lulu, her teacher, the school nurse, and the principal are all infected by a word warp which makes them reduplicate everything they say.

Jake is determined to win the grand prize at Despres Elementary School's first science fair, not only for the Hyper-Cross-Functional Bluntium Twelve computer system, but also to beat the annoying third grade know-it-alls, Marsha McCall and Kevin Young.