A school has been slammed after students as young as 13 were forced to make replica genitals out of plasticine. At another school, students were made to attend a teacher's class on masturbation.
Melbourne mother Marijke Rancie said her son, who was in year 7, returned home visibly upset after attending one of the controversial classes.
Talking to former federal Labor leader Mark Latham, the mother described her horror of what was taught.
"They were given things like plasticine and pipe cleaners and obviously I thought, 'This is health class'," she said.
"Are we talking reproductive system? What are we doing here?
"It was very clear it was made as a sexual organ. So he had to sculpt it, as he knew it, and then he was redirected to make a clitoris and the labia."
Mark Latham's Outsiders programme then played a recording of a Victorian high school teacher who was encouraging students to masturbate, Daily Mail Australia reported.
In the audio the teacher can be heard saying masturbation is "easy for boys" while "for girls, it's a little bit different" before saying girls do touch themselves.
The revelations come less than a month after a Victorian state school came under fire for telling students to "delay sexual activity".
The school sent an email out which said: "Our shared goal is to delay sexual activity in school-aged youth".
One parent said it sends students a "damaging, archaic" message and "sets up a culture of shame around sexual desire and feeling".
Last week, another Melbourne school came under fire for letting boys wear girls' uniforms.
Latham is against same-sex marriage and was sacked as a Sky News presenter for calling a schoolboy gay.
The former Labor leader also made headlines after being visibly upset that gay issues get so much publicity considering that same-sex couples make up just 0.8 per cent of relationships in Australia.