In Key Stage 4 students prepare to take examinations for the IGCSE (International General Certificate of Secondary Education). Students in this key stage in Great Britain are usually between 14 and 16 years old. Students who transfer to The International Preparatory School without the adequate preparation to do IGCSEs will be prepared for these examinations before proceeding on to higher level examinations such as AS (Advanced Subsidiary level) or A-levels (Advanced levels).