The president of the NASUWT teaching union is set to attack the government's education reforms, claiming they are distracting from the task of teaching children.
Mick Lyons will tell NASUWT's annual conference in Bournemouth hat education is being used as a "political football".
In a speech, he will say: "Daily denigration of the work and commitment of teachers, false claims of plummeting educational standards, and attacks on jobs, salaries, conditions of service and pensions are leaving colleagues heartily sickened and demoralised."
More top news
The President has been removed from his post at the head of the ruling ZANU-PF party in a move that adds to pressure on him to stand down.
The deputy leader of far-right group Britain First has been arrested in London over a speech made at a rally in Belfast this summer.
A retired solicitor from Bristol has died after being swept overboard while competing in the Clipper Round the World yacht race.