Pupils at Worthing High School have an extra week's holiday because of delays in building work.
They were meant to start the new term tomorrow but will not now return until next Monday.
The late start is to enable the finishing touches to be made to the school's new technology block and art room.
Pupils and parents were told about the delay several weeks ago.
The work is part of a development programme which also includes the New Millennium Hall, which opened at Easter.
The new block will provide facilities for food technology, textiles, maths and technology classes.
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