A teacher's aide at an Albertson school for students with physical and medical disabilities has been arrested, charged with endangering the welfare of a disabled person, after police said she engaged in "an inappropriate relationship" with an 18-year-old student.

Ivone Oliviera, 34, of 96 Barrister Rd., Levittown, was arrested Thursday in Albertson, Nassau police said.

The Henry Viscardi School on I.U. Willets Road became aware on May 14 "of a serious allegation involving unacceptable conduct by a teaching assistant," according to a statement issued by Kim Brussell, school spokeswoman.

The school immediately reported the matter to police and state officials, the statement said.

According to the statement, the school has been cooperating fully with the investigation and the teaching assistant "no longer works here."

Police said that, beginning in January, Oliviera "displayed inappropriate physical contact" with the male victim, including "hugging and kissing."

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An investigation found that Oliviera also had sent the teen text messages and photos "of a sexual manner" from her phone, police said.

Oliviera, arraigned Friday in First District Court in Hempstead, pleaded not guilty and was released on her own recognizance. She is next due in court on June 12. Her attorney could not immediately be reached for comment.