UPDATED 4.11pm Labour's wondering what's happened to the majority of funding set aside by the Government for education.

The Party's education spokesman has figures to show just seven percent of the Government's flagship Educational Success initiative has actually made it into the classroom.

Chris Hipkins said that leaves more than 90 percent of the $359 million committed to the programme, sitting idle.

"That's money that should be going into schools that isn't. At a time when parents are being asked to fork out more and more to cover the costs of their kids education, I think most parents are going to be pretty concerned by that."

Hekia Parata said the Investing in Education scheme relies on schools to agree on achievement standards, and release student achievement data.

She said so far all of the 1503 schools involved in the programme nationally are yet to do so, so they haven't been able to distribute the funding as promised under the programme.

Ms Parata said she's impatient because she knows the difference this will make to teaching quality and student learning once it's fully implemented.

Labour says it has figures showing higher decile schools get more funding than their lower decile counterparts, under the Government's flagship education programme.

Mr Hipkins said the Government says it wants to reward good teaching - but data shows the majority of funding is going to teachers at wealthier schools.

"I simply don't accept that the best teachers are working in high decile schools. I think there are some brilliant teachers working at low decile schools that are just as worthy of reward."

But the Ministry of Education's Katrina Casey said it's misleading to suggest such a funding imbalance.

She said more higher decile schools signed up to the Investing in Education Success programme initially - so they were represented more heavily in the first allocations of funding.

Ms Casey said that will change as lower decile schools get on board with the programme.