This latest poll comes amid a major overhaul by the Government of teachers' salaries, which will see pay linked to performance in the classroom.
Under the reforms, due to come into effect from this autumn, in the first five years of a teachers' career, increases to their salary will be tied to how successful they are at their job, rather than their length of service.
The move has been opposed by a number of teaching unions as this type of performance-related pay is already in place for more experienced teachers.
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The Foreign Secretary also said he would like to have a ‘crack’ at being PM.
The PM has accused the Labour heavyweight of ‘undermining’ negotiations and ‘insulting’ voters.
More than 200 notable figures have signalled support for the campaign.