International Baccalaureate (IB) is an international educational foundation that runs educational programs such as the Primary Years Programme (PYP) and Middle Years Programme (MYP). The Diploma Programme (DP) and the Career-related Programme (CRP), though not part of IB, are administered through them. The International General Certificate of Secondary Education (IGCSE) is a separate curriculum offered by another institution in the UK that otherwise has no affiliation with either IB or Cambridge International Examinations. Regardless of whether you're studying an IB or Cambridge curriculum, both can be attained by taking a series of exams upon completion that award certificates when taken at higher levels. The IGCSE is a class X level certificate exam after which the student can opt for A and AS level exams. With IGCSE, students can also make a transition to IB Diploma Programme which they opt for as per their academic standard. The choice, therefore, is between Cambridge A, AS