Tired of being the class nerd, Lizzie Archer decides to change her image just before the start of 7th grade. No more Emily Dickinson -type dresses! Now she`ll dress exclusively in Gap jeans and the like. When school begins, Lizzie is amazed at the differences such a superficial change makes--the girls are talking to her and the boys are flirting with her. Lizzie thinks that only her intelligence stands between her and true popularity, and so she begins to make mistakes in math. Will Lizzie`s new trick win her the heart of her secret crush, and math partner, Ethan Winfield?