More than 160 schools in Northern Ireland are waiting to find out if crucial building work will be carried out.
Work will only go ahead in “a small number” of those schools, according to the permanent secretary of the Department of Education, Derek Baker.
Mr Baker said that a “constrained budget” would limit the running of the school enhancement programme.
Hazelwood’s principal Kathleen O’Hare criticised what she called an “unwillingness of the civil servants to become political in making decisions”.
Hazelwood had applied for £3.9m to resolve accommodation issues, as its enrolment was due to rise to 1,010 pupils, while the school was originally built to hold 720.
Latest BlogsPupils in secondary schools with a more diverse racial mix are much more positive about people of different ethnicities, say researchers.
More than 60 NI schools lose funding to run breakfast clubs
Education bodies to work together to support state schools
Carl Frampton, World Champion Boxer Made Dreams Come True for Hundreds of Children in Integrated Schools
NASUWT responds to Management Side letter on industrial action in schools
Ahern said that the British-Irish Council could be a useful forum to discuss integrated education and societal desegregation.
Principals’ association calls for school funding review
Crossing Divides: The benefits of having friends who aren’t ‘just like us’
Oxford Centre for the Study of Intergroup Conflict