Prime Minister Julia Gillard will deliver a speech on school funding in Canberra on Monday but says the government's Gonski response is still some weeks away.
She will, however, use her speech to pledge that every independent school in Australia will have its funding increased under the government's new plan.
The Australian Education Union (AEU) will mark six months since the Gonski review's public release by placing a "sea of hands" on the lawn outside Parliament House.
The cardboard hands contain the names of all 6700 public schools and are signed by school principals, parents and union representatives.
AEU Federal President Angelo Gavrielatos said the hands are a way to urge all federal politicians to turn the Gonski recommendations into law this year.
"We need action on Gonski now, not more words," he said in a statement.
"The federal government must take the lead by outlining its response and the financial commitment it is prepared to make.
"Then we need the state and territory governments to play their part and enter into genuine negotiations for a new funding agreement."
Gillard is expected to view the hands display later on Monday morning.
The union says the Gonski review made it clear there is an urgent need to invest in education, particularly in public schools, and the current funding system is unfair and ineffective.
The Australian Greens want the federal government to act on the Gonski school funding review by passing the recommendations into law by the end of the year.
Greens spokeswoman on schools Penny Wright says the government has been given a clear way forward and it's now time for a "definitive response".
"We want to see the government respond and stop the uncertainty and delay," she told reporters in Canberra on Monday.
"We need legislation by the end of the year so that we can be sure that we have a fairer education funding system by 2014."
She said Australia was behind its OECD partners in terms of public education funding, and called for serious investment in a fair system "based on needs".
The prime minister will deliver a speech about the review to the Independent Schools Forum on Monday, amid concern top-performing schools will be financially "penalised".