Over the Rainbow — Meredith Badger

In a city only for fairies, Rainbowville has brilliantly colored trees, glittering skyscrapers that look like crystal, and fairies skateboarding in midair. It is decidedly NOT the sort of place that Ellie likes. But when Ellie's Grandmother Knottleweed-Eversprightly finds out that she is a Fairy School dropout, she picks her up from human school and enrolls her in Rainbowville's Fairy Boarding School.

Fairy School has never been easy for Ellie. She can't get the hang of synchronized flying, and always messes up her spelling tests. And boarding school is even more strict. Ellie doesn't think she'll ever be able to keep up. But does she want to stop being a fairy? Or will the Fairy School dropout become a proper fairy after all?