NSW will face an influx of less-qualified teachers from other states, the NSW government has warned, unless national minimum standards are adopted to prevent students from flooding into university degrees.

Last week Victoria became the second state to adopt a minimum entry standard, an ATAR of 65, for students wanting to study teaching, in order to stem an oversupply of graduates entering the profession and boost teacher quality.

It prompted Australian Catholic University vice-chancellor Greg Craven, who chaired the federal government's teacher education advisory group, to warn limiting the teacher intake risked "annihilating the teacher workforce".

"The end result will be teacher shortages and enormous class sizes," he said.