High school English teacher Urszula Jankowska had three-year lesbian relationship with student starting when girl was 13

A New York City teacher is accused of carrying out a three-year lesbian relationship with one of her teenage students - beginning when the girl was 13 years old.

Brooklyn teacher Urszula Jankowska, 33, was arrested and charged with sexual misconduct on Monday after first allegedly complaining that the young girl was threatening her on her Facebook page.

That complaint to a principal at Williamsburg High School for Architecture and Design allegedly revealed their relationship when Jankowska accused the girl of posting threatening messages, the New York Daily News reports.

The student told a school counsellor that she and Jankowska had become 'intimate' starting in 2008 when she was 13.

Three years later, in October of 2011, their relationship ended she said.

Police said the alleged sexual misconduct occurred at various locations.

The Department of Education said Jankowska, who recently switched to teaching English as a second language at the school, was immediately removed from the school following the allegations.

Meet up: A student at this school allegedly came forward telling a guidance councellor that she and Jankowska had intimate relations starting when she was 13

She has since been charged with criminal sex act, forcible touching and endangering the welfare of a child.

Creating speculation by at least one student, Terrence Woods told the Daily News that the charges sound out of character for the woman.

'She doesn't really seem like that kind of a person at all,' Woods who had Jankowska for English his sophomore year said. 'She's just a nice English teacher.'

It was not immediately known if she had an attoey.

The investigation is continuing.