A Key Stage is a stage of the state education system in the United Kingdom and Gibraltar setting the educational knowledge expected of students at various ages. The stages are as follows: * Key Stage 0: Nursery and reception years (3-5 years old). Now included as part of the Early Years Foundation Stage * Key Stage 1: Years 1 to 2 (5-7 years old) * Key Stage 2: Years 3 to 6 (7-11 years old) * Key Stage 3: Years 7 to 9 (11-14 years old) * Key Stage 4: Years 10 to 11 (14-16 years old). The exams at the end are typically of the GCSE level. * Key Stage 5 (more commonly referred to as "Sixth Form"): Years 12 to 13 (16-18 years old). The exams at the end are typically A-Levels, AS-Levels, NVQs or HNDs.