In a major u-turn, Education Minister Hekia Parata says staff pupil ratios will not change.
The move comes in the face of a backlash from teachers and parents after Budget moves to increase class sizes.
Parata said the Government had decided not to make the change after it became clear parents did not accept the change.
Labour leader David Shearer this morning said Prime Minister John Key should tell Parata to cancel the plan to increase class sizes.
"He must also front up to New Zealanders with a list of the schools that will supposedly be better off as a result of the policy. Not one school I have spoken to since the policy was announced believes they'll get an increase in teaching staff."
Parents and teachers had made their feelings clear, Shearer said, pointing to polls showing about 80 per cent of voters are opposed to the policy.
There was also no evidence yet of how National would spend its "so-called savings on improving teacher quality".
