On Friday, Cumberland County District Attorney Dave Freed urged parents to closely monitor their children's text messages and social media accounts.
The announcement came at a press conference after a Cumberland Valley High School teacher was charged with institutional sexual assault for her alleged relationship with an 18-year-old student.
"The message to parents is, you need to 100 percent read your child's text messages, follow them on Instagram, follow them on Twitter," Freed said.
He added, "Parents just have to be on top of this stuff."
Emily L. Nesbit, 31, of Carlisle, was charged Friday morning with the third-degree felony count, which carries a maximum penalty of seven years in prison, Cumberland County District Attorney Dave Freed said.
Freed said Nesbit and the male student engaged in sexual acts in her classroom after school hours.
He said Nesbit and the student also exchanged text messages with photographs of themselves in various states of undress, and the investigation began when another student learned of the photos.