Forty-two-year-old Michael Scheeler of Lower Milford pleaded guilty Thursday to possession of child pornography and invasion of privacy.
Scheeler admitted filming seven teenagers through hidden cameras in the bedroom and bathroom. The victims were from Korea, Spain and the U.S.
The exchange students attended Faith Christian Academy in Sellersville, where Scheeler had worked as a volunteer.
He was charged in January after a student saw videos from the cameras on Scheeler's laptop and told school administrators.
The Morning Call of Allentown reports Scheeler will be sentenced in August in Lehigh County Court.
Information from: The Morning Call