A report tabled at a meeting of state and federal education ministers on Friday revealed almost one in five students need support for some kind of disability, almost double previous estimates.

The meeting chose to delay the implementation of needs-based funding for at least a year, but NSW Teachers Federation president Maurie Mulheron fears the wait could be much longer - possibly after the next federal election.

"We believe this is [Federal Education Minister Christopher] Pyne playing political games to avoid the responsibility of the government to fund Gonski and to fund the student-with-a-disability loading from next year, when it was expected by the profession that it would be," Mr Mulheron said.

"Potentially over 100,000 students now, because of the federal government's refusal to fund students with a disability appropriately ... could miss out on the resources they need."

Mr Mulheron said the PricewaterhouseCoopers research indicated "a huge proportion" of students weren't currently getting funding.

"This is not a problem that's going away," he said.

"There'll be schools throughout the South Coast and Illawarra region who enrol students with disabilities ... and the money that was expected to be given to those schools is now under threat.

Schools contacted by the Mercury on Monday preferred not to comment, with little known about the report at this stage.

A spokesman for the Wollongong Catholic Education Office, Tim Gilmour, said the impact was unclear.

"We'll be looking closely at this report and what the implications are," Mr Gilmour said.

Mr Pyne said the government had "more than met its commitment to introduce a funding loading to support students with disability in 2014 and is providing more funding than ever before."