The Education Union has raised concerns, after Victorian government schools were given the go ahead to offer senior secondary students an alternative to the Victorian Certificate of Education.
The International Baccalaureate Diploma was founded in Switzerland in 1968 to provide schools with a qualification recognised by universities world-wide.
But the A-E-U's Victorian President, Mary Bluett, says interested schools will have to find tens of thousands of dollars in costs from their own budgets.
"Now the minister has said that the school can charge the parents for the exam, but the rest of the money must come from within the schools own global budget."
"The only way that can happen is if other programs are cut to generate that money." She says.