Heather Daughdrill of Westlake, Louisiana, is suspected of starting the affair with the boy at a summer school bible camp.
She is accused of taking the boy out of school without his parents' permission and taking him to her home for sex.
Police investigators found sexually explicit text messages that had been sent by Daughdrill to the boy.
Officers were tipped off that the teacher was having an inappropriate relationship with the child last month.
She was sent to Calcasieu Correctional Center on four counts of carnal knowledge of a juvenile, eight counts of sexual battery, three counts of 2nd degree kidnapping, contributing to the delinquency of a juvenile and indecent behaviour with a juvenile.
She is now in Beauregard Parish Jail on three counts of 2nd degree kidnapping and carnal knowledge of a child.