Tara Cardinale, a 39-year-old primary therapist, "invited the student to her residence, where they engaged in sexual activity," Bergen County Prosecutor Mark Musella said Tuesday.
Records show Cardinale, who worked at the Alliance Academy, is accused of doing it twice with the same student.
Cardinale remained held in the Bergen County Jail after being arrested Friday on charges of child endangerment through sexual contact and criminal sexual contact.
Paramus police were alerted to the alleged relationship in late December, Musella said.
A joint investigation by the his Special Victims Unit and Paramus and Washington Township led to her arrest, the prosecutor said.
A first appearance was scheduled for Wednesday in Central Judicial Processing Court in Hackensack, he said.
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