Emily Nesbit yearbook photo

Former Cumberland Valley High School teacher Emily Nesbit, from the 2013 school yearbook.

HAMPDEN TOWNSHIP — An 11th grade English teacher at Cumberland Valley High School is accused of performing a sexual act with a male student in her classroom, according to search warrants released Thursday.

Emily Nesbit, 31, is under investigation by Silver Spring Township police. The Cumberland Valley School District announced in a statement that Nesbit resigned from her position Wednesday, after school officials learned of the allegations Monday.

The search warrants were filed by Detective Jared S. Huff for the phones belonging to Nesbit and the student, and records from both of their cellphone providers. The warrants, obtained at the office of Magisterial District Judge Kathryn H. Silcox in Hampden Township, also outline details of Nesbit’s activity with the student, which police said are as follows:

Police started their investigation around 2:45 p.m. Monday after receiving a call from high school administrators. Officer Christopher Butler arrived at the school in Silver Spring Township and spoke with associate principal Rob Martin.

Butler learned from Martin that another 18-year-old female student had reported looking through the cellphone of the male student with his permission. She said she saw conversations between the student, whose age was not stated, and Nesbit that seemed sexual in nature.

The male student in an interview that day with Butler did not deny he had a "relationship" with Nesbit, Huff said. He also turned over his iPhone to police.

The student was then interviewed Tuesday morning at the township police department. He said he had been meeting with Nesbit in her classroom a couple times a week at the end of the school day.

He said he held hands with the teacher and they had kissed in the past. He also said that a week prior Nesbit had performed a sexual act with him in her classroom and they had been communicating regularly for roughly two months.

The student’s iPhone showed that he labeled Nesbit as “My Lady Friend” in his phone. It also revealed that the student and Nesbit had exchanged photographs of each other in various states of undress and had discussed meeting in her classroom during and after school hours.

Moreover, Nesbit in the messages stated her desire to have sex with the student, and police said the messages also inferred some sexual activity had taken place.

Nesbit was interviewed by police later on Tuesday and admitted to performing the sex act with the student. She also acknowledged they had held hands and kissed and that all of their meetings had occurred in her classroom. Nesbit at that point turned over her iPhone to police.

Charges are still pending against Nesbit.