Relief teachers have criticised the Australian Education Unions Tasmania's endorsement of a wages deal which would see their pay decreased by 30 per cent.
The new deal includes a reduction in relief teacher loading from 82 per cent to 30 per cent. There will be an increased loading of 50 per cent for schools that can demonstrate an inability to attract teachers.
North-West relief teacher Matt Ward said the loss of loading will result in an overall pay decrease of 30 per cent for casual teachers.
Mr Ward said, as a Band 1, Level 12 teacher, he is set to lose $138 per day or $27,600 per teaching year based on a full time equivalent of 200 days work.
"That's my bread and butter. If I'm going from top-paid teacher back to what I was getting paid in 2007 - that's huge," he said.
Mr Ward said the AEU's endorsement of the deal would create division instead of encouraging solidarity.
"Where the union is coming from is fundamentally against what the union's purpose is which is to bring us all forward and negotiate an equitable situation," he said.
"We're just fodder for other pay increases. We're sacrificial lambs for the top-paid and permanent employees.
"The gains that are actually being made is the 7.5 per cent minimum pay increase over three years. The government is not actually contributing extra funds, it's just taking away from one sector of teachers and giving that to another.
"Whether you're relief - which can be way harder than coming in as your regular classroom teacher who has all those relationships established - or permanent, it's unfathomable that we are going backwards when we need to be going forwards all together as a profession."
Mr Ward said he was not a member of the AEU because he believed the union does not represent the interests of his sector of teachers, and therefore he will not be able to vote on the proposed agreement.
AEU state manager Roz Madsen said from when the first government offer was proposed, it had included reduced relief teacher loading in order to partially fund one hour of the reduced instructional load for primary teachers.
"That is obviously something we have been trying to get for over 20 years, some equity between primary teachers' and high school teachers' instructional loads," Ms Madsen said.
"The government's solution to that was to partially fund it through reduced relief teacher loading."
Ms Madsen said the proposed loading offer between 30 and 50 per cent would put Tasmanian relief teachers in the middle-of-the-pack nationally with loading.
"Currently the loading for a relief teacher is 82 per cent and that is the highest loading for a relief teacher in Australia," she said.
Ms Madsen said the reduced loading runs alongside a new government initiative in the agreement to create a relief teacher pool.
"In order to have relief teachers be available to teach in schools that are more difficult to get relief teachers too, more complex schools or geographically isolated schools, it's been their idea put forward in the offer which would have a minimum of 50 full-time, permanent relief teachers," Ms Madsen said.
AEU members will vote on the latest agreement in a confidential online poll on Thursday.
"Every single member will get an opportunity to vote on the package," Ms Madsen said.
"It is a package, and with any negotiated outcome you don't get everything that you want. The government has moved on a range of things that we needed and we've moved on a range of things."
Premier Will Hodgman said it was a tremendous breakthrough to get the AEU executives to agree on the latest government offer.
"I'm sure that not everyone will be pleased but I would hope that the majority would, given the executive's leadership," Mr Hodgman said.
"We do need to balance our budget, to make sure that not only do we keep our budget in good shape but our education system continues to grow."