WICHITA, Kan. (AP) — A former Kansas middle school teacher has pleaded guilty to electronic solicitation of a child after swapping explicit messages with an undercover Wisconsin law enforcement officer.

The Wichita Eagle reports 41-year-old Steven Young of Derby entered his plea on Monday. In exchange, prosecutors dismissed a charge of sexual exploitation of a child.

The Sedgwick County District Attorney’s office says Young was an eighth-grade social studies teacher at Derby North Middle School when he used an online chat room in July 2015 to contact the undercover officer, who he thought was 14.

Prosecutors say the two had several conversations over Skype in subsequent months before Young took his clothes off Oct. 17 and performed a lewd act during a video chat.