HOUSTON -

A Cypress Fairbanks ISD teacher is facing multiple charges, accused of sexually assaulting an underage male student.

Corrie Anne Long, a math teacher at Hopper Middle School, is charged with improper relationship with a student and sexual assault of a child under 17 years of age. Court documents state a student reported seeing strange behavior between Long and a male 8th grade student.

The student told investigators they saw the 8th grader hitting Long on her behind. The student also said they saw Long sitting on the lap of the 8th grader.

"It can be seen through just the two of them, their daily interaction, that they had something inappropriate, and we get an entire case," said prosecutor Joshua Phanco.

The student victim told investigators that Long is his math teacher and that he has known her since the 6th grade. Court documents show the boy admitted to police that he and Long were involved in a sexual act in her classroom on Nov. 15, 2013. The boy told investigators Long told him not to say anything because she would lose her job.

The victim was 15 at the time of the incident.

Cy-Fair ISD officials said, "The safety of our students is always our highest priority. The District took immediate action to remove the teacher once the allegations were made, and we will continue to cooperate fully with law enforcement in this matter."

Local 2 found out the teacher was a special education teacher and had been employed by the district since 2002.

Long, 43, is free on bond. Her next court appearance is scheduled for late April.