Teachers demanding more hours to plan for the classroom lessons have been backed by Australian voters across the political spectrum.
Poll results released on Thursday found Labor, coalition and Greens voters unanimously support the NSW Teachers Federation's latest campaign call to ease the burden on educators.
"Teachers in NSW have had the same preparation time for decades yet in that time, classrooms have been transformed," federation president Henry Rajendra said.
"There are far more students with disability, more complex needs, more cultural and linguistic diversity, and a curriculum that keeps changing".
Primary school teachers in NSW receive two hours a week to plan lessons, organise compliance for students with extra needs and collaborate with colleagues.
The teacher's union is calling for this time to be doubled.