“The Gonski campaign has been running two years now and all political parties had the opportunities to support it,” Mr Thomson said.

He made his comments at a rally outside the school this week where NSW Teachers Federation president Maurie Mulheron told a small crowd of parents, teachers and children that “Gonski is to education what Medicare is to health”.

If the Coalition is re-elected it will withdraw almost $18 million from federal education funding over the next two years, according to Mr Mulheron.

“We sought bipartisan support for the heart of the program, to deliver then maintain over a six year transition period minimum resource standards around the State,” Mr Mulheron said.

“That bipartisan support is not going to happen if there is a Turnbull government which means we will never get to that minimum resource standard.

“Our patience has run out and we’re asking parents to take this message, to win it on the ground in conversations with other parents and colleagues.

“Teachers should not have to be compromising - [you] are capable but not resourced for the task ahead. This is the most vital issue facing the nation.”

Mr Thomson said “it is about equity funding for students and making it fairer - all schools are up for it not just public schools”.

A backdrop to the rally was one of three large predominantly green Gonski billboards on the backs of trucks touring electorates during the election campaign.

Federal Member for Gilmore Ann Sudmalis maintains the Coalition’s position, saying current levels of additional school funding are “completely needs based”.

“This means schools with low socioeconomic demographics have additional funding.

“Existing additional programs that schools have introduced to assist their students will continue,” she said.