Students across New South Wales head back to school in the next two weeks and about 9,000 of them will be walking into brand new schools and classrooms.

The six new and 11 renovated or upgraded schools are part of the NSW Government's multi-billion-dollar strategy to ease the squeeze in overcrowded schools.

Education Minister Rob Stokes said the strategy is about future-proofing schools.

"We're talking about a $6 billion spend over the next four years — bigger than we've ever seen in NSW," he said.

"It provides a pipeline of new schools and upgrades right across NSW and it's calibrated to where we know the growth is going to occur.

"These 17 projects … will add around 9,000 places for students across NSW and provide more than 400 new permanent classrooms."

The Government's total school infrastructure plan aims to eventually build 2,000 new classrooms across the state and create places for an additional 43,500 students.

But education policy analyst Blaise Joseph said the Government's plan was "a very small step towards solving the long-term problem".

"There's going to be a massive increase in students going into public schools in NSW, especially in Sydney, and the problem needs to be solved soon otherwise there's going to be lots of kids who can't find schools," said Mr Joseph, from the Centre for Independent Studies.

School rollout 'an abysmal failure'

Labor Opposition spokesman, Jihad Dib, said the Government had failed NSW school students.

"In 2016 the Minister promised that he would deliver 12 new schools a year, in 2018 they opened two," he said.

"I'd call that an abysmal failure.

"As kids return to school next week there will still be a record number of kids sitting in demountables — more than we've ever had before."

One of the new schools is Narellan's Yandelora School, which has been purpose-built for children with moderate to severe disabilities.

The $20 million campus has a hydrotherapy pool, flexible learning spaces that can be adapted to the needs of students and hearing aid loops in every classroom.

The Yandelora School in Narellan has a hydrotherapy pool and hearing aid loops in every class room. ( Supplied: NSW Government )

Principal Jacqui Lockyer said 50 children from the Macarthur region are enrolled to start next week.

"Some of our students have very high-support physical needs, some of them have very high-support medical needs," she said.

"Our staff are specially trained to meet those needs … and what we do to meet those needs is we adjust the curriculum.

"I sometimes call it 'bespoke' — we look at every child as a unique person and we go 'what can they do' and what comes next."

The school hopes to enrol another 50 children over the next three years, taking the total school population to around a hundred students.