Joshua Green, 33, of Clifton, was charged with sexual assault, official misconduct and child endangerment.
A Superior Court judge in Paterson freed him, pending further court action, after a detention hearing Thursday afternoon.
The teen was a 17-year-old student at Mahwah High School when at least one of two incidents occurred at Green's home in 2015, authorities said.
Green, who is married, taught for three years in Mahwah before leaving in 2016. He currently works at the Plainfield Academy for the Arts and Advanced Studies.
He was arrested Thursday after an investigation by Passaic County Prosecutor Camelia M. Valdes's Special Victims Unit, the Department of Children and Families Institutional Abuse Investigation Unit and Mahwah police.
Anyone with information that might be connected to the case is asked to contact Detective Sgt. Jim Stolz of the Passaic County Prosecutor’s Office Special Victims Unit at (973) 837-7736.
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