Labor education spokeswoman Prue Car said the new school was supposed to deliver jobs in its own community but instead parts of it were being "trucked in from Western Sydney" and interstate.

"Why is the NSW government sending school construction jobs to Queensland and Victoria when we should be supporting jobs in NSW?" she said.

"The Liberals are sending infrastructure money and jobs out of our state at the worst possible time."

During Parliament on Thursday, NSW Education Minister Sarah Mitchell was asked where parts of new schools were being built, including the $36 million primary school in Wagga's northern suburbs.

Ms Mitchell said Wagga was one of the schools being built under a "pilot program" with a "new technology" called Design for Manufacture and Assembly (DFMA).

"In Wagga, the primary school, also a DFMA project, part of the pilot, Hansen Yuncken is the contractor and it will be the same scenario where the factory is based in Smithfield [in Western Sydney] for the structural framework to be built," she said.

"Fit out of the modules will be in Queensland as part of this pilot project."

Ms Mitchell defended the use of interstate pre-fabrication as the new schools projects were part of a pilot scheme for building new schools quickly and on a large scale.

"They are buildings that are built off-site to high standards and then assembled quickly on-site, reducing the amount of time for on-site construction," she said.

"There are a lot of advantages to building this way: it encourages innovation in the construction manufacturing, opens up participation in the construction industry to a broader market and also supports apprenticeship training and greater workforce diversity in safe conditions.

"The method of construction of new public school facilities at this large scale is new to NSW , that's why we have done a pilot program of five schools..they did procure local building contractors that engaged the services of specialist contractors."

Estella's new school was granted final planning approval on Thursday under a state program designed to fast-track proposed works that would create new jobs and stimulate the economy.

Independent Wagga MP Joe McGirr said on Thursday morning that the new Wagga school would create 300 jobs during construction.