The NSW Education Department is investigating a Lake Macquarie high school after students raised concerns about a teacher's views on rape.

Key points: Students at Swansea High School have rallied outside the school to demand the teacher's sacking

Students at Swansea High School have rallied outside the school to demand the teacher's sacking The teacher allegedly brought up a recent rape case in Newcastle

The teacher allegedly brought up a recent rape case in Newcastle The ABC has contacted the school for comment

The comments were allegedly made by a female teacher during a class at Swansea High School last week.

The ABC has obtained a video of the moment the teacher appears to tell students if women are raped, their clothing choices should be held partly accountable.

The students claim the same teacher told a class, "all men have to fight their urges every day not to sexually assault or abuse [women]".

The NSW Department of Education said it was investigating the comments.

A department spokesman said the teacher would not be in class on Monday and students had been offered counselling.

Students gathered outside the high school this morning and called for school to sack the teacher.

Reece Hill, a Year 10 student seen in the video arguing with the teacher, said the class had been learning about the 1950s.

"She was talking about fashion and how it's changed from the '50s through to now'," she said.

"Then she started bringing up the case of a girl who was recently raped in Newcastle.

"She said if the man needs to be held accountable, the woman needs to be held just as accountable."

More than 50 students took part in a protest outside Swansea High School. ( ABC News: Madeline Lewis )

The Shadow Minister for the prevention of domestic violence and sexual assault, Trish Doyle, condemned the comments made in the video.

"We need to end the culture of victim blaming that follows public debate around sexual violence," Ms Doyle said.

"As the students of Swansea High have reminded us, rape is not caused by a woman wearing a short skirt.

"It is caused by a rapist. It is never the woman's fault."

The ABC has contacted the school for comment.