Representatives from the AEU launched a mobile billboard at Ulverstone in Tasmania on Tuesday, which criticises Scott Morrison's government for slashing $559 million in public school funding in the recent federal budget.

Australian Education Union federal president Correna Haythorpe said public schools in the regions were missing out on $1289 of funding per student on average.

"How that plays out on the local level is that schools cannot afford the additional teachers, education support staff and essential learning programs for students," she said.

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"It is unacceptable in Australia, which is a country that has the funds to make sure that every child has the right to attend a properly resourced and full-funded public school, that these funds are not delivered.

"A decade ago, the Gonski Review made a recommendation that we should have a schooling resources standard, and that should be backed up by loadings to cater for students who come from disadvantaged backgrounds.

"What we've seen under Coalition government, and particularly in the last three years under the Morrison government, is that the money is not being delivered to our schools."

When asked for comment, Acting Education Minister Stuart Robert took the opportunity to criticise Labor.

"It's disappointing the Opposition still doesn't understand school funding and aren't being straight with the Australian people about their plans for education, though Labor being light on education is not surprising given Tanya Plibersek has never actually been Education Minister before," he said.

"If the Labor Party had any idea how the budget worked, they'd know that the Morrison government has been doing more than our fair share of heavy lifting on school funding to government schools and we're meeting all of our commitments."