That is according to year 5-6 teacher Peter Harrison, formerly of Launceston but now of Hobart, who works an average 55-hour week that includes classroom teaching, staff and committee meetings, lesson planning and numerous other tasks.

Mr Harrison's working week backs that of the report released yesterday - the day before World Teachers' Day - which found that teachers' workloads had increased and intensified by 93 per cent in the past five years.

The report also found the majority of teachers (82 per cent) were unable to do all the tasks required of them in their working day and some worked as much as an 82-hour week.

The report comes as the Education Department's 2012-13 annual report released last week showed a significant rise in the number of employees making claims for stress.

Stress claims rose from 53 in 2011-12 to 73 in 2012-13, with 57 of the claimants referred for rehabilitation.

Union president Terry Polglase said burgeoning workloads had to be addressed to prevent them affecting the quality of teaching, and he said the union would bring it to the department's attention as part of enterprise bargaining negotiations.

``There has to be an acknowledgment of what is being expected of teachers today,'' Mr Polglase said.

He said the rigmarole of working in a school and staying on top of all the procedures and paperwork, as well as teaching, was immense.

Mr Harrison said it was not any one thing that added to a teacher's workload but the culmination of many things.

He said greater staff support in administration and IT was required in schools.

The cutback of administration staff at schools had a direct impact on the additional work expected of teachers, he said.

Mr Harrison said teachers received a salary for a 35-hour week, yet the average working week was 55 hours.

Education Minister Nick McKim said he believed the report was accurate and some teachers' workloads were increasing.

He said he was happy to continue working with the union and discus possible alternatives to address the problem.

Opposition education spokesman Michael Ferguson said the report was a result of the $190 million budget cuts.

``You can't rip $190 million out of education, like Labor and the Greens did, and expect that students will get the same level of education and that teachers will grin and bear the extra workload,'' Mr Ferguson said.