KS3

Key Stage 3 (Years 7, 8 and 9)
Found on http://www.kirklees-ednet.org.uk/kirklees/glossary.htm

KS3

Key stage 3Third stage of compulsory schooling for UK children (ages 12-13 years)
Found on http://www.tda.gov.uk/Recruit/Global/glossary.xhtml
No exact match found