Teachers will probably be joined by help staff for the very first time after they strike on Wednesday, with as much as 400 schools expected to close.

About 15,000 teachers and assistance staff are expected to attend a rally at Melbourne's Rod Laver Arena and then march to Parliament Residence, where they're going to be joined by around 5000 of their Catholic school counterparts, whose pay is tied to their government school colleagues.

Australian Education Union Victorian president Mary Bluett mentioned education division staff would be at schools to watch youngsters whose parents were unable to arrange alternative supervision.

"Students might be cared for; they undoubtedly will not be obtaining an educational system," she told AAP on Tuesday.

Premier Ted Baillieu mentioned the strike will be disruptive for schools, parents and students.

"We have on the table an give which would see the best-performing teachers be the best-paid teachers inside the country," he told reporters in Ballarat.

"Performance pay goes for the heart of making certain we get sufficient rewards for the ideal teachers."

Ahead of winning energy in November 2010, Mr Baillieu promised to create Victorian teachers the top paid in the nation.

The AEU has rejected a proposed deal from the government, that is supplying two.five per cent annual increases, with anything at all further to become offset by productivity gains.

It would also make the top 30 per cent of teachers in each teaching category the most beneficial paid in the nation.

The union desires a 30 per cent pay increase over three years and more job safety for teachers and help staff, a lot of of whom are employed on a contract basis.

Ms Bluett mentioned a timetable of rolling half-day strikes will be place to members. The strikes would not take place through Victorian Certificate of Education exams.

An additional full-day strike on February 14 next year was also on the table.

In 2013 teachers could also refuse to work more than a 38-hour week to highlight the hours of unpaid function they undertake.

"When teachers go on camps and are on duty 24-7 there is no overtime, there is absolutely no time in lieu, after they spend hours and hours with regards to undertaking a school production or even a musical, coaching sports teams . having orientation evenings," Ms Bluett stated.