One state's teachers will strike for the first time in more than 15 years after rejecting a government pay offer.
Thousands will walk off the job at state schools across Queensland on August 6 after union members voted in support of a 24-hour teacher strike following months of talks.
Almost 600,000 students at state primary and high schools are expected to be affected.
The Queensland Teachers Union said its almost 50,000 members had voted to take industrial action, marking its first strike since 2009.
It comes after the Queensland government failed to secure a new teacher pay deal following 17 meetings with the union in the last five months.
A government offer of three per cent, 2.5 per cent and 2.5 per cent salary increases over the next three years was rejected by the teachers union in June, sparking protests.
Hundreds of teachers descended on Queensland parliament in June demanding "nation leading salaries" as they chanted outside.
Enterprise Bargaining Agreement negotiations for the teachers were referred to the Industrial Relations Commission for conciliation by the Queensland government on Monday after a new deal could not be finalised.
"The QTU looks forward to presenting its claim before the commission and urges all community members to support resourcing and funding state schools appropriately," union president Cresta Richardson said.
Education Minister John-Paul Langbroek said the government remained committed to finalising an agreement.
"The government has requested conciliation through the Queensland Industrial Relations Commission to progress an agreement," he said in a statement.
He said "student safety will remain the priority" on August 6, with principals set to inform parents about the strike's impact on their school community.
The union, which represents 48,642 members, had been seeking better pay and conditions under their new deal.
Teachers are expected to rally in Brisbane during the strike action.
