A short course GCSE is equivalent to half a GCSE. A GCSE double award is equivalent to two GCSEs, an intermediate GNVQ equivalent to four GCSEs, an AS level to two GCSEs. A levels and international GCSEs are not included in the Key Stage 4 Achievement and Attainment Tables. Other qualifications can vary according to the subject. Complete information on the equivalence of all qualifications used in the Achievement and Attainment Tables is published by the Qualifications and Curriculum Authority in the National Database of Accredited Qualifications at
http://www.ndaq.org.uk/