If a Tree Falls at Lunch Period — Gennifer Choldenko

At a school where the academic competition is fierce, the popularity race is fiercer, and if you're not rich, you're nothing, friends are good to have. Luckily, Walker and Kirsten have each other. But just when a tough seventh grade year is beginning to look a little brighter, Kirsten stumbles across a secret -- one that could disrupt not only her friendship with Walk, but their whole lives.