Schools will be hit by escalated industrial action by teachers from today in a row over jobs, pay, pensions and workload amid "deep concerns" among staff over their profession.
Members of NASUWT will only produce one written report a year to parents, will not submit lesson plans to senior managers and will refuse to invigilate mock exams.
Teachers will be able to supervise activities outside school hours, such as sports clubs and drama, if they are happy to do so, but will refuse if it is imposed on them by a headteacher.
Union members will also only send and respond to work-related emails during school hours.
The National Union of Teachers (NUT) will undertake similar action from October 3.
More top news
A modified version of the herpes virus has proved a major success in phase III clinical trials.
The WWF reports that these new species were all found in 2014 - but that human development is already threatening many of them.
Research into long-term breeding patterns in flies showed that mothers whose ancestors displayed gay behaviour were more fertile.