The Clueless Girl's Guide to Being a Genius — Janice Repka

Aphrodite Wigglesmith is a thirteen-year-old prodigy. After a fast track through Harvard, she's back at her old middle school to teach remedial math and prove a bold theory: anyone can be a genius with the right instruction. Enter Mindy, a ditzy baton twirler who knows more about hair roots than square roots. What could she possibly learn from such a frumpy nerd, except maybe what not to wear? But somewhere between studying and shopping, the two girls start to become friends. They're an unlikely pair, but in this uproarious middle-grade comedy, wacky is the norm and anything is possible - just like middle school.