Police have laid seven charges against a female former teacher at a northern beaches high school, who is accused of grooming a teenage male student for sex.

The woman was arrested at a unit block in Dee Why at 9.15am and taken to Dee Why police station.

The crime manager of Manly Local Area Command, Detective Inspector Luke Arthurs, told media a short while ago that the unnamed women, then 46 and now 50, had been charged this morning with five counts of aggravated sexual assault and two counts of aggravated indecent assault.

He said the boy, now aged 19, had come forward to police with his parents in February. It is alleged she groomed the boy then aged 15 for sex in 2008.

The alleged victim was “fine” but undergoing counselling.

Detective Inspector Arthurs said police had received “intelligence” that the woman might have targeted others and called for anyone else who might have had “an inappropriate” relationship with a teacher in the area between 2003 and 2010 to come forward.

He also asked anyone who had heard of “inappropriate relationships” on school premises to come forward.

The alleged offences are said to have taken place at various locations around the northern beaches and at a classroom in the school, which police have refused to name.

The woman taught at the school between 2005 and 2008 but was teaching at other schools until 2010.

Detective Inspector Arthurs said those schools were mainly on the northern beaches and a small number on the north shore.

“The school is aware of some rumours floating around and has been very supportive of the police investigation,” Detective Inspector Arthurs said.

At this stage no one else was alleged to be involved, apart from the woman charged.

Source: Child sex case: female former teacher arrested on Sydney's northern beaches (http://www.smh.com.au/nsw/child-sex-case-female-former-teacher-arrested-on-sydneys-northern-beaches-20120622-20s3d.html)