www.theguardian.com/education/2019/sep/18/25-of-teachers-in-england-work-more-than-60-hours-a-week-study
says:
A quarter of teachers in England work more than 60 hours a week, far in excess of their counterparts elsewhere in the world, research reveals.
The study by the UCL Institute of Education said that five years of government initiatives to reduce excessive workload, introduced by three different education secretaries, have done nothing to cut the total number of hours worked by teachers which have remained high for two decades.
Researchers found that teachers in England work 47 hours a week on average during term time, including marking, lesson planning and administration, going up to about 50 hours in the summer during the exam season.
That is eight hours more than teachers in comparable industrialised OECD countries, though the disparity with some countries is even greater. While the average full-time secondary school teacher in England in 2018 worked 49 hours per week, the equivalent teacher in Finland clocked up 34 hours.
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The study revealed that two out of five teachers in England usually work in the evening and one in 10 at the weekend. Full-time secondary teachers report they spend almost as much time on management, administration, marking and lesson planning (20.1 hours a week) as they do teaching (20.5 hours).
The findings are based on data from more than 40,000 primary and secondary teachers in England collected between 1992 and 2017. The lead author, Prof John Jerrim said: “This is the first study to attempt to track the working hours of teachers over such a long period of time.