Commenting on the passing of an urgent motion at NEU Annual Conference in Brighton, Daniel Kebede, general secretary of the National Education Union, said:
"Our nation's schools have been chronically underfunded for more than a decade. Today, 74 per cent of schools have less funding than in 2010. The consequences of this are clear for all to see - larger class sizes, burned out teachers leaving the profession, and buildings literally falling apart.
"Children with SEND have been failed for too long by a system buckling under the strain of a lack of resources. This cannot be resolved by cutting corners or small cost saving measures. Reforms to SEND provision need to be funded properly - including to pay for additional staff - if they are going to be successful.
"The NEU will resist any renewed push towards academisation. An unaccountable MAT model that has failed to deliver transparency, equity or value for money, must be opposed.
"We will not sit back and accept more cuts to our schools. Educators are being pushed to the brink and we will take a stand, including through a formal ballot if necessary, to secure the money our schools need."