A teacher claims she was forced to quit after refusing to adopt her school's stance on same-sex marriage.

Rachel Colvin alleges the Ballarat Christian College discriminated against her because of her political and religious beliefs and is now taking legal action against the school.

The devout Christian claims the school counselled her but when she refused to follow a statement that said marriage can only be between a man and a woman, she was forced to resign in 2018.

Mrs Colvin is taking the school to the Victorian Civil and Administrative Tribunal for discriminating against her under the Equal Opportunity Act.

Rachel Colvin (pictured) alleges the Ballarat Christian College discriminated against her because of her political and religious beliefs in February 2018

'I am devastated by what happened. I loved my job. I am an extremely hard worker and loyal to a fault, and to have it end the way it did was, at first, professionally humiliating,' Mrs Colvin told the Herald Sun.

Mrs Colvin refused to agree with the school's statement as she believes same-sex marriages are a reflection of God's love.

She believes her alleged forced resignation is an opportunity to stand up for same-sex marriage and LGBTQI students.

'They were created as they are, in the image of God, and that they are fully loved by God and share equal dignity with all other humans. I am hoping to achieve policy change, so LGBTQI students and staff don't worry about being expelled or fired.'

The devout Christian claims the school counselled her but when she refused to follow a statement that said marriage can only be between a man and a woman, she was forced to resign (pictured Ballarat Christian College)

The executive officer of policy for Christian Schools Australia, Mark Spencer, said the school provides education in accordance to its beliefs.

'It is vital that all staff at the college can share, live out and express the beliefs of the college in their interactions with students, parents and the wider community ... unfortunately, Mrs Colvin has indicated that this would not be possible for her,' Mr Spencer said.

Mrs Colvin wants her former employer to declare it has discriminated against her and promise the will not fire another teacher because of their beliefs.

She will also be seeking damages, interests and costs.

The Ballarat Christian College has been contacted for comment.