P.O.V. - The Education of Shelby Knox | PBS

A self-described "good Southern Baptist girl," 15-year-old Shelby Knox of Lubbock, Texas has pledged abstinence until marriage. But she becomes an unlikely advocate for comprehensive sex ed when she finds that Lubbock, where high schools teach abstinence as the only safe sex, has some of the highest rates of teen pregnancy and STDs in the state.