Haylie Smart, 29, an Oklahoma high school teacher has been arrested on allegations of having sex with a student, starting when he was 17 years old. She was arrested on a charge of second-degree rape. The Oologah-Talala High School student turned 18 in December, but regardless of the student's age, it's illegal for a teacher to have sexual encounters with a student, under Oklahoma state law. It's believed Smart had sex with the student both after class, and also at his home, during a two-week statewide teacher walkout.