A former gym teacher will spend up to three years in prison for having sex with a 14-year-old freshman, and sending the boy erotic text messages and nude photos of herself by cell phone.

Twenty-seven-year-old Beth Ann Chester pleaded guilty to statutory sexual assault, corruption of a minor and criminal use of a cell phone.

Moon Township police say the health and physical education teacher met the teenager last year at Moon Area High School, where she taught 9th grade and coached volleyball.

Chester resigned in December and was arrested in early January after she confessed to having sex with the boy, including once in a school parking lot.