State schools are increasingly relying on their own fundraising to fill a funding gap, an AGM of the Association of State School Organisations has heard.

Education Minister Jeremy Rockliff took questions from school associations at the meeting in Hobart on Saturday.

Many associations are concerned about the Education Department's Student Assistance Scheme (STAS) and the top-up funding schools are needing to find.

STAS provides schools with a portion of school fees for children from low-income families.

The President of Tasmania's Association of State School Organisations, Jenny Eddington, said schools received approximately $75 for each of those students, but school fees vary from $100 to $500.

"One of the really big questions is that STAS has not been increased for at least 14 years," she said.

Carol Gordon, from Kings Meadow High School's school association, said her school has 30 per cent of students receiving STAS.

"So that's a substantial drain on the budget of the schools that are impacted," she said.

"School associations spend a lot of time fundraising to fund facilities and activities... like replacing sports uniforms, digital cameras for the art department, replacement aprons in technology, things like that.

"What it does mean is there's 150 kids at Kings Meadows where the school is having to find $425 just to break even."

Tasmanian president of the Australian Education Union Terry Polglase said $75 was not appropriate.

"Not if we believe that a child should be provided with a more than adequate education and something that will inspire them and provide them with opportunities that will lead them into future employment," he said.

"If schools don't have funds they don't run programs — forget about excursions, forget about school camps."

Mr Rockliff said he was not aware of the associations' concerns and would look into them.

"This is the first time the issue has been raised with me," he said.

"The Government is, of course, happy to discuss the issue with school associations."