Schools in Northern Ireland have been left in an "impossible position" by the recent education budget.
That is according to a letter to the secretary of state from the president of the Association of School and College Leaders (ASCL).
Graham Montgomery said schools were facing a "significant real terms cut".
The Northern Ireland Office said the budget, set by the secretary of state in the absence of executive ministers, prioritised health and education.
The basic funding for schools was reduced by about 0.5% in the Stormont budget.
However, they are getting some extra money to help with existing staff salary agreements and rising energy costs.
