Key Stage 4, or KS4, is the term used for the years of schooling between the ages of 14 and 16.

Key stage 4 includes IGCSE subjects. IGCSE stands for the International General Certificate of Secondary Education. It is a two-year programme leading to externally set, marked and certificated examinations from the University of Cambridge. Any student who takes an IGCSE subject will be gaining a qualification that is recognised globally.