The Solidarity Party wants to remove religious ethos from the sex education in school.
The party says the curriculum should be 'factual and objective'.
Solidarity is bringing its Objective Sexual Education Bill to the Dáil, with a debate scheduled for April 18th.
It includes a call for sex education in schools to include issues such as contraception, sexuality, gender, consent and LGBTQ+ concerns.
Ruth Coppinger TD explained: "Sex ed is often not being taught at all in schools, and when it is it can be from the prism of a moralistic standpoint - with young people not getting the full information that they need.
"We want it to be a positive discussion about sexuality... but also giving all the information that young people need."
Sixth-year student Megan Brady added: "We need to be having honest and realistic conversations in our classrooms.
"I think schools need to be a lot more concerned about protecting the safety of their students rather than the ethos of the school."
It comes a day after Education Minister Richard Bruton announced a major review of relationships and sexuality education (RSE) in schools.