A former English teacher at The Classical Academy in Colorado Springs has pleaded guilty to sexual assault of a student. Thirty-eight-year-old Mark Alan Priest was charged with sexual assault on a child by a person in a position of trust. Priest admitted having a relationship with a 16-year-old student. The girl's father called police last June after learning a teacher was having sexual contact with his daughter. School president Mark Hyatt says Priest no longer works at the charter school. The Classical Academy emphasizes character education. Priest will be sentenced March Tenth.