The UK's largest teaching union has warned of strikes in the autumn until the Government commits to "inflation plus" pay hikes.
The National Education Union said it would consult its 450,000-strong membership over potential industrial action if ministers fail to act on pay, staffing and workload issues.
In a letter to the Education Secretary Nadhim Zahawi, NEU chiefs Dr Mary Bousted and Kevin Courtney said: "We can no longer stand by while you run both education and educators into the ground."