A 40-year-old teacher at a downtown Toronto high school has been charged with sexual exploitation.

Timothy Dingwall, a teacher at Harbord Collegiate Institute, is now on home assignment.

A spokesperson for the Toronto District School Board said Tuesday that the school called the police when the allegations were first brought forward.

"When the allegations were brought forward to school officials, police were immediately contacted, and the teacher has been off since that time," Kelly Baker told CTV News.

On Monday, the school sent students at the school home with a letter informing parents of the allegations, she said.

The school board will not commenting further on the nature of the allegations while the matter is under police investigation, Baker said.

According to the Criminal Code of Canada, sexual exploitation is an offence that involves a person in a position of authority or trust over a 16 or 17-year-old sexually touching that young person or dependent.