Teachers say there's no point in the government talking innovation while refusing to commit to needs-based school funding.
The Australian Education Union has released its pre-budget submission arguing pupils won't get a high-quality education without the final two years of the Gonski education model being funded.
Funding for students with disabilities remains "in crisis" without Gonski, while people are missing out because TAFE courses are becoming too expensive.
The union has armed itself with data from schools around the country showing improvement with the extra cash, with better student grades, engagement and attendance, and teachers with morale and confidence.
Homebush Boys High School in NSW, which has a high proportion of students newly arrived in Australia, has reported better English language skills and NAPLAN scores among its students.
Minimbah State School in Queensland has used just under half a million dollars of extra funding to improve literacy and numeracy outcomes among students from low socioeconomic backgrounds.
"All this is at serious risk with the coalition government's decision to renege on its 2013 election commitments as reflected in its first and second budgets," the union said in a statement.
"Prime Minister Turnbull's vision of an innovative, competitive and flexible nation will not become a reality unless all our students are assured of a high quality twenty-first century education."
The union wants better-qualified teachers as part of its focus on science, technology, engineering and mathematics subjects.
About 40 per cent of the nation's year 7 to 10 maths classes are being taught without a qualified maths teacher.
