A radical new funding mechanism for schools will deliver an extra $109,000 for one school and nothing for others.

LISTEN ABOVE: Hekia Parata spoke to Larry Williams about the new funding

Schools are learning today how much extra funding they will get as a result of having students "at risk" of educational underachievement enrolled.

The vast majority will receive some extra money, ranging from a few hundred dollars to $109,000.

But while the total amount will be revealed, the names of students who have been identified as needing extra support will not.

The new funding mechanism was introduced as part of this year's Budget.

Schools operations funding, which greatly affect resources and day-to-day operations, normally keeps pace with inflation.

That did not happen this year. Instead, about $12.3 million will be split between schools that have some of the 133,171 students judged to be at risk - schools will get about $92 for each such student.

It will be up to schools as to how they spend the extra money.

Education Minister Hekia Parata said the new funding on its own would not be a silver bullet.

But it was more targeted than the $16 per student increase had the operations funding been increased by 1 per cent.

"Some schools will receive a few hundred dollars whilst others are getting up to $57,000 with one exception receiving the most at $109,000, reflecting the challenges their students face."

Every school in Waikato, Auckland, Bay of Plenty, Rotorua and Taupo will get extra funding from Term 1 next year.

PPTA president Angela Roberts said the increases detailed today were simply not enough to help schools do the best for at risk students.

"An equity funding approach that includes funding specifically for extra teaching and support staff, as well as operational funding, is most likely to lift achievement. The PPTA believes the government should...prioritise this approach.

"An increase in equity funding must be new money. There is no fat in the system, so shuffling budgets from one school to another is not a solution."

The at risk students are identified by the Ministry of Social Development using a powerful anonymised database.

It is part of wider "social investment" being championed by Finance Minister Bill English. Its aim is to share data across government agencies to identify and map New Zealanders at risk of poor outcomes later in life.

The aim is to then target support accordingly.

The at risk targeted funding is not a replacement for decile funding.

However, a sector review team are looking at possible alternatives to the decile system, which Parata has said needs to go.

It is likely the at risk model could be extended to eventually replace the decile system.